Engine Knock Goes Away At Higher Rpm
Audi EPC light on and transmission is locked in park. A vacuum leak on a fuel injected engine will cause high idle. Setup for hydraulic flat tappet cams. :cheers Show Full. Using a mechanics stethoscope I pinpointed the problem as the idler pulley. 5 manual trans. To check your clearances, you can insert a thickness gauge between the valve stem and the rocker arm or lifter. What is Engine Knocking? Knocking in your engine, also described as pinging, can mean one of several problems. Speeds of 65+ in 5th, less than that and it was substantially less noticeable. Deep Discounts on Hotels, Flights and Rental Cars. I only have 150 miles on the car, but I've started to notice a tick that only occurs at 1800-1900 rpm. this sounds like a tappet ,but morphs into a knock at times,loudest at idle,goes away just above idle. Any thoughts on what this might be?. Lifter Tick or Rod Knock? If your engine ticks along with engine RPM and the ticking sounds slower, say once every engine revolution it could indicate that you’ve got rod knock. Car has only 62,000 miles. They sense knock and make adjustments internally (timing) automatically. It doesn't matter whether it's icy cold, or fully warmed up. The engine makes such a pleasant sound as the diesel purge is working its way through the pump and the injectors and “softening out” all those harsh sounds. 5 volts, I think, ill double check that range. If I accelerate quickly from 50-60 there's no rattling noisebut that's also because I get out of the RPM range too quickly. The ticks were not high pitch. I almost forgot about the knockits really loud at timeskinda like it will be loud for a while and when i let off the gas it will go away for about 2 or 3 seconds and then while come back again. The problem with cam gear, which leads to the loss of pressure of engine oil. Start the engine and check to ensure that you're getting adequate oil pressure and listen for lifter tapping. It depends to big extent on luck but one thing can help spring life and that is avoiding high rpm on cold springs i. Engines designed with timing gears, or those equipped with a timing chain and sprockets, can produce different noise. Either its always been doing it and i've only noticed it now that the heat isn't always on and the radio has been lower in volume, but its one of those things that im always noticing. While driving it does the same - it comes and goes. If I let it warm up for 3 to 5 minutes, it is not as noticeable and for the most part goes away. The purpose of the stick (you can use a large screwdriver too) is to help pinpoint the location of the noise. This time I ran the rpms up to show how the ticking noise tends to go away at higher RPMs. 0L 488 CID ten cylinder engine is a V-type, lightweight, single cam, overhead valve engine with hydraulic roller tappets. A few weeks later, my opinion was asked. Programmable exercise Operates engine to prevent oil seal drying and damage between power outages by running the generator for 5 minutes every other week. If I accelerate quickly from 50-60 there's no rattling noisebut that's also because I get out of the RPM range too quickly. Engines designed with timing gears, or those equipped with a timing chain and sprockets, can produce different noise. engine noise knocking sound at 2600-3000rpm when cold !!? so there is some clearance that will not go away and you will hear noise -- just like solid lifter. Ideas? July 24, 2016 : Followup from the Pelican Staff: Could be a valve tap or oil pressure issue. I've replaced the oil with Mobil 1 high mileage 20/50 synthetic, with no help. I try to coast as much as possible. Do not use the top half of the rev range until the engine reaches operating temperature. cause and fix / repair - Duration: 2:06. I'm not saying that the engine is knocking, I'm saying if its caused by the ecu why can't it be told to fuck off and stop trying to be so efficient that your causing knock retard. The car has perfectly normal power at low rpm's (4. The 2013 Yamaha R1 superbike essentially remains bog similar to the 2012 version, which in turn was very similar to the 2011 model except cosmetic changes, with no mechanical changes or additional features to speak of. This gateman is the IMRC valve. Using a stethoscope, the greatest "tapping" is at the #5 cylinder intake and exhaust. Why is my rpms running high when I start to accelerate slow? My 2005 Nissan Sentra runs great except when I start to accelerate to get speed, my rpms rev up and you can hear it. I believe it was the hydraulic lifters that got gunked up and the MMO freed it up or cleared away the passages or something. when the engine is cool, there is no knocking, but once it gets warmed up it starts aknockin'. Subaru Knock Monitoring FAQ Last Updated: 6/30/2011 Brief Background Thanks to the power of the AccessPORT and AccessTUNER software, it’s now easier than ever to gain unparalleled insight into the current status of your engine’s tune and running condition at any given time. rev from idle to maybe 2. I am the second owner of my 2005 Ford F-150 XLT 5. With professional-grade features, easy starts and dependable power, the 7000 Series offers everything on your wish list — and then some. In the VCM Editor>Edit>Engine>Spark Advance>Main Spark vs. A lifter makes more of a loud "ticking" noise, as does some forms of exhaust leaks. The compression ratio was fairly high at 9. At 2500 rpm this is likely to be completed very near TDC or just a few degrees thereafter, at which time you have MDP. but distinct and then goes away. I guess my next step is to get a diagnostic. I have a 2010 edge limited. in too high of a gear. 2012 v6 at DCSB engine knocking @ 1500 rpm. This happens while stopped and on the freeway while riding. The noise is only noticeable when the engine is warmed up and at low rpm. The changes for the second generation Coyote (2015-2017) were widely focused on airflow and high rpm operation. The ticking sound goes away around 60-70MPH but can sometimes still happen. To program the unit cut the loops as shown in Figure 1. It only knocks when it is cold or has not warm up. On the V8 engine, you should try to adjust the cam retard as close to 0 as possible. The point being is that it would matter little if the engine was out of a VW bug or a Ferrari. The noise is there at idle and seemed to get worse initially when the rpms raise but at higher rpms it seems to go away. You will piss off you neighbors with how loud it sounds. The noise goes away when the engine warms up. Im hoping since the oil hasnt been changed in there in like three years since its been sitting that maybe just needs some good fresh oil in the drive. Poor oil pressure means that the entire engine is starving for oil, and it's a problem that needs to be addressed as soon as possible. The engine was making this noise before the 12,000 mile service. Never saw any damage done. If the vibration goes away or stays constant while the vehicle is not in gear, it may be an issue with the wheels or drive shafts going to them. Above listed are some of the reasons for the engine knocking. Six available high-powered engines means that every 2020 Mustang comes with performance in its DNA. Repair Procedure. No excessive blowby out the oil filler cap when running. The higher the octane number, the better able the fuel is to resist. Jeep wrangler 2. Anybody got an issue number writeup on FCA's? Interesting. Valve and tappet noise usually begins as a clicking sound, or chatter, at half engine speed and may then disappear at high speeds. once you get above idling rpms, the knocking goes away completely and the engine runs very smooth. When I first brought it to the dealer they said it was a normal sound. i also had the same problem. If you stop after being out and start it up with temp at about 1/2 of normal it ticks then as well. Really loud when cold, reduces some when engine warms but still there. if a rod, sound would still be there. Knock/Rattle at high RPM shifts/acceleration. If I rev the engine it will not knock. My ear says it's spark knock. I especially notice it if climbing a moderate hill where I have to really press the gas. It started a few weeks ago and has been getting worse. A vacuum leak on a fuel injected engine will cause high idle. I had a knock in a SBC in my Nomad that would go away quickly after the engine started. My guage tells me "Oil Pressure Low" when driving on around turns at speed (On/Off-Ramp on the Highway). Thinking this could be a harmonic or vibration issue at low RPM, I checked and found motor mounts and all bracket attachments to the engine to be fine. It is used to detect engine knock or detonation (there is a piezoelectric element inside the sensor). Many of the modern high compression engines or engine that use forced induction require premium fuel at 91 octane or higher. A tapping at the top of the engine could be a problem in the valve train someplace. 5i engine often has a knocking sound under 2000 rpm when I try to accelerate, it sounds like I got a diesel engine under the hood!!! Also, in an indoor garage, i found when the engine revs over 2000 rpm under light load, there is a pretty loud vacuuming sound from the engine. It is like a tick tick sound. Discussion in '2nd Gen. But there’s no one under your car and no one is knocking on your engine. Ford has revised the design of the camphazers late 05 if i recall correctly to prevent that from happening. The noise can occur at all engine speeds, mostly occurring in the 2500-RPM range. Some 2016-2017 Mustang GT350 equipped with the 5. The car has perfectly normal power at low rpm's (4. During a cold start you don't hear it untill the engine warms up, at which point if you do a power-brake at low RPM's and hold the throttle you can hear it clearly Since the knock seems to go away and not just get drowned out by the engine's higher RPM's, I'm hoping it's just a sensor. The upgraded Datsun Go addresses many of the concerns raised on the economy hatchback’s original debut. Spent a week driving the jeep like I stole it. We haven't done seafoam or sparkplugs, did anyone have luck getting rid of noise with new sparkplugs? If nit, I fear it is something with the CVT, and I'm sure it's not cheap. Today I noticed that when rpms hit about 2000 rpm engine starts making this funny noise (starts and stops before actual engine revving noise) and goes away at 2600 rpm. If the noise goes away, then it may be the engine or clutch assembly that is causing the problem. A sudden loss of engine oil may cause engine failure, increasing the risk of a crash. Audi EPC light on and transmission is locked in park. The V-1650 liquid-cooled engine was the U. The intake valves are open for a longer period of time to produce more power. Humming noises are usually an indication of a bad bearing. The cause is often excessive valve clearance or a defective hydraulic valve lifter. Engines designed with timing gears, or those equipped with a timing chain and sprockets, can produce different noise. 0 mercruiser knocking/clacking sound high RPM Over full is not good, but shouldn't cause that noise. Like the title says, my Manual transmission makes noise when in gear with clutch disengaged, only at high tire rpm for gear. Look at their higher RPM requirements. The mechanic seems to think there is an air leak somewhere in that area. I have the same kind of knocking noise but I know what the problem is i know how to fix it aswell. It can be a sign of a few things. This might be offset some by running higher octane gasoline. Noise goes away while driving or at high rpms and there are no engine codes or check engine lights. 200cc RUNNERS, 64cc COMBUSTION CHAMBERS. A lifter is what opens and closes intake and exhaust valves. Still, strong demand suggests that Datsun is on the. Your fuel needs to be stored in a suitable container and treated with fuel stabilizer to be sure it doesn’t go stale. I'm both extremely excited to know that it's probably not my wiring that's causing the problem, but I'm not sure what is. A/X/Z Plan pricing, including A/X/Z Plan option pricing, is exclusively for eligible Ford Motor Company employees, friends and family members of eligible employees, and Ford Motor Company eligible partners. com FREE DELIVERY possible on eligible purchases. engine noise knocking sound at 2600-3000rpm when cold !!? so there is some clearance that will not go away and you will hear noise -- just like solid lifter. I should probably check engine mounts and stuff. when i first start the truck and its cold i hear a different rattle, but that goes away within seconds. Given that the sound goes away upon acceleration, it sounds like it may be something that is loose since the vibration from higher RPM’s makes it go away, however I would recommend having an certified expert, like one from YourMechanic, come to your home to diagnose the sound firsthand and help you make the necessary repairs. Add an oil-flushing solvent into your engine. Other than the knock, the engine starts and runs perfectly. This is a discussion on Valvetrain Noise at 2,000 RPM within the Mustang GT350 Problems and Issues forums, part of the Mustang GT350 Forum category; Yes the dipstick is hard to get to and I found on mine if I make sure the oil reading side is facing down when. If the vibration increases with the RPMs of the engine, the issue is likely in the engine or transmission. This engine is designed to run on unleaded fuel with a minimum octane rating of 87. com To inquire about a short block, or other parts, please use our Engine Inquiry Form. Jump to Latest Follow 1 - 4 of 4 Posts. very balanced and has good power. once it warms up and is at proper idle speed the knock goes away. Try that and check back in. If I rev the engine it will not knock. I am the second owner of my 2005 Ford F-150 XLT 5. , and many of the terms can make the event seem rather innocuous. A "knocking" sound is the most typical engine noise indicating a mechanical problem that can be fixed if diagnosed correctly and early. A sudden loss of engine oil may cause engine failure, increasing the risk of a crash. I thought main bearings. When the car is parked for a long period of time, oil drains out of the high-pressure chambers and allows air to get in. My engine squealed at idle and low rpms and then it would go away and then sometimes it would come back. Say the idle speed of an engine is 1000 rpm (revolutions per minute). eng i Declaration of Conformity ‑ For Recreational Craft Propulsion Engines with the Requirements of Directive 94/25/EC as amended by Directive 2003/44/EC. once it warms up and is at proper idle speed the knock goes away. going up hills). Not wanting to run it with the whine I'd run it at lower rpm's; after it got hot from working the whine would go away. Well just when I'm ready to turn 200K, I'm hearing this knock or tap. That's right, I only had about 1/2 a quart in the engine when I first heard the noise. Help me identify what's causing this engine to knock. That is from gear slack in the nose drive. No visible smoke from the tail pipe. Your fuel needs to be stored in a suitable container and treated with fuel stabilizer to be sure it doesn’t go stale. Engine knocking noise - suggestions please Just be careful because it could throw the rod at anytime especially during high RPMs so you might want to take it easy. Some 2016-2017 Mustang GT350 equipped with the 5. However, I have not noticed a change in performance in any way. A) Your start-up noise went away. My engine squealed at idle and low rpms and then it would go away and then sometimes it would come back. So whenever I accelerate the second my foot touches the gas I get a buzz almost like audio static or an electrical crackle that's different and louder than the engine up to maybe 4000 rpm. A heavier knocking sound that gets louder as engine RPMs pick up can mean a rod knock or main bearing knock. Welcome to The Globe and Mail's comment community. This plate can be removed to increase power, but only if there are no noise restrictions where you fly. SITUATION Customer complains the engine exhibits a high-pitched squeal from the engine accessory drive belt. Engine Tapping I my case, (F-150, 153k miles ), I thought for sure it was an exhaust leak because it would tap loud on cold day startups and then go away after the engine warmed. Got her running today and it's definitely making a knocking noise at idle and it sounds worse at high RPM. Whining noise from my f150 Lately i've started to notice that my f150 has been making a "whining" noise. by Scott Mead, Contributor. Those numbers, however, are only for the SE trim level with the available 2. If it remains, then oil pressure is the likely culprit. by Kyle McFadden. Not losing any antifreeze or oil. agreed to build the Merlin engine for both the American and the British Governments, and adapted it for American mass. But since it goes away under stress my money is on lower half something failed and she about to go boom, stay as far away from high rpm's as you can, and baby the hell out of it, no. At high RPMS (I'll take notice when exactly at another time) prior to shifting up, I hear what sounds like a somewhat-loud rattle. It seems to come from the bottom of the engine and towards the back. Since the oil is more viscous at colder temps, and the car is running at higher rpms, your are simply. What it sounds like is like a hollow tap / knock, as if you were tapping a hammer on a piston. Hello All, My Saturn sl1 1999, with 130k miles has developed a intermittent rattle at idle. Subaru Knock Monitoring FAQ Last Updated: 6/30/2011 Brief Background Thanks to the power of the AccessPORT and AccessTUNER software, it’s now easier than ever to gain unparalleled insight into the current status of your engine’s tune and running condition at any given time. Rev the motor and if the noise goes away at a specific rpm, then it's the tensioner Run some cleaner through the motor to clean up the valves. Mini Cooper S R56 – engine woes – BR Racing Blog – SERVICE Alert. it disappears as soon as you bring the rpm up to 1000 and you do not hear it upon acceleration at any rpm. The noise did not happen gradually, it started when I started it up one night. If you're questioning what is normal engine noise, I may have the answer. The first step is to identify where the engine noise is being generated. If your engine belts squeak only when damp, you probably only need to have the belts adjusted. the motor knocks at high rpms, it wont knock at an idle, when it revs out it knocks. Get it to about 2,500 RPM. Maybe because of the noise of the motor, wind, etc. upon entering my vin it stated your car has been affected. I couldn't get Nissan to ever admit any problem. [Symptom:] The engine idles and runs very smoothly until the engine is pushed to RPMs exceeding about 3,100 to 3,200 RPM. Is that similar to what you're hearing? The initial noise on start up is more than likely the lifters. Its when the slap does'nt go away when warm is when your in. Restrictions apply. Fairly reproducible. Allow the engine to idle for fifteen minutes. Ive been having a strange engine sound randomly at higher cruising speeds 60-65 mph (keep in mind I have a 3. A/X/Z Plan pricing, including A/X/Z Plan option pricing, is exclusively for eligible Ford Motor Company employees, friends and family members of eligible employees, and Ford Motor Company eligible partners. eng i Declaration of Conformity ‑ For Recreational Craft Propulsion Engines with the Requirements of Directive 94/25/EC as amended by Directive 2003/44/EC. While not all of our engine dealers offer money back guarantees, we prefer to let customers know about the engines that do come with warranties. 0L 488 CID ten cylinder engine is a V-type, lightweight, single cam, overhead valve engine with hydraulic roller tappets. If you have bad fuel, that could account also for the O2 code present. If I increase the RPM beyond 5000, the noise will go away temporarily, but come back after a few more minutes of driving. Above 2500 rpm I can't hear it either, maybe because the engine is making exhaust noise plus the thrashing about from the vvel. Subaru FA20 engine tuning. The engine is meant to function smoothly, transitioning from one point of the four-stroke cycle to another. Amazing how fresh fluid will sometimes eliminate valve train noise. It sounds like Im getting some knock at high rpms, just before or right as my truck shifts from 1st to 2nd. Noise also occurs just after letting foot off the gas. There is no noise if you rev the engine when it is in park. Is that similar to what you're hearing? The initial noise on start up is more than likely the lifters. Goes away when the clutch is pulled in. It is 100% repeatable when I hit the 2500 RPM mark. ) If the noise(s) you have been concerned about go away during a purge, then you can breathe easy. The noise occurs again, when I shut the engine down. So if your Vortec engine is having issues and you’re not a mechanic, go through this procedure: Find an HONEST mechanic who is accredited by the BBB, who has a fair hourly shop rate, and who has been in business for some time. The engine may shake so badly at idle that it causes vibrations that can be felt in the steering wheel and throughout the vehicle. version of the famous British Rolls-Royce "Merlin" engine which powered the "Spitfire" and "Hurricane" fighters during the Battle of Britain in 1940. The noise Arne following the rpm from the engine. Whatever the setup, advance increases with engine RPM and decreases as the engine goes under a load. It sounds like it's coming from the engine compartment, left side, maybe around the brake booster. by Kyle McFadden. The noise also only appears when it is warmed (engine running for about 3 - 5 minutes after cold start). A loud screeching sound could come from different sources. The noise would go away when i shifted the truck into. If I run RPM's to about 2500, knock goes away. Knock becomes less apparent as RPM increases and completly goes away after 2000 RPM ( I've never encountered this with an engine rod bearing going bad). At higher speeds its not noticeable, but its all I can hear up to maybe 20 mph. It meets EPA Final Tier 4 (FT4) emission standards. As the hill flattens, the noise goes away without RPM or throttle change. There are many items that can make a 'ticking' noise that is tied to the RPM of the vehicle. i would start saving up for a rebuild down the road. 7L) with 32,000 miles. Higher rpms faster tick or knock or whatever the heck we call it. When I get to about 3000 rpms it seems to go away. As Murphy’s Law might dictate, the noise didn’t go away and, in fact, became worse. When customers are complaining of a cold engine ticking noise, most BMW dealers are suggesting that it is normal fuel injector noise. We have found that there is a significant reduction in the noise levels in the cabin and outside the aircraft. It goes with engine RPM as well. My engine is making a ticking noise, and its not the valves because it's too inconsistent and it sounds like the cam chain (a friend of mine had the same thing so I know what it sounds like, but that was on a 250, and it was actually broken). Missing material causes higher rpm and diminished efficiency, potentially damaging the engine at worst, and slowing the boat and using more fuel at best. We haven't done seafoam or sparkplugs, did anyone have luck getting rid of noise with new sparkplugs? If nit, I fear it is something with the CVT, and I'm sure it's not cheap. 0L diagnosing piston slap, rod knock or a valvetrain noise noise but goes away as the engine warms. never know. High test gas eliminates it. So yeah 98 would be a good test. I have a 2003 Chevy Cavalier with the 2. I have an '02 Trailblazer LTZ with 53000 miles and has the same issue. It is, also, an excellent demonstration that. If the noise is gone, of course the problem is a belt driven accessory. not sure what it is. Also, clean your throttle body, as it causes all sorts of idling/stalling problems. Ford will notify owners, and dealers will replace the engine oil cooler tube assembly, free of charge. The rattle goes away with ANY rpm increase at all, so far I have changed the Motor mount as these are known for failing(and mine was way past gone) this solved the noise for about 2 days(and made a huge difference as far as my car shaking), but now its back. CUMMINS ISX CM570 excessive noise in the front gear I have some problems with ISX engines, the noise is very high I could not find the problem, we have removed all the gears and we adjusted, also the oil pump, but the noise will not go away Possibly he was thinking for Air Compressor Noise I would like to solve the problem because it is much noise, especially when the engine runs 1500 rpm I. Whistling type noise from engine bay When I come back from a short trip to run an erand or sometimes when I come home from work I hear a ringing coming from the front of the engine. A vacuum leak on a fuel injected engine will cause high idle. 7 hemi when I'm on the highway cruising and when I need to pass someone the engine pings between 1000 and 2000 rpms,when I press the gas more the pinging go's away. Always warm up the engine by driving gently until its at full operating temperature. you can run the engine briefly after removing the pump to see if its the cause of the noise,but usually the wear on the pushrod or pivot on. I only have 150 miles on the car, but I've started to notice a tick that only occurs at 1800-1900 rpm. Engine is knocking at 2500 RPM in my 4cyl 2000 Tacoma. A knock will normally be a muted, heavy "thud" if it is in the bottom end(crank/rods) of the engine, and a little higher pitched if it is in the upper end(piston). The noise occurs again, when I shut the engine down. when engine is hot the knocking sound from engine backs of a little bit doesn't go away and if you try. This is the maximum speed at which the engine can safely operate. If I let it warm up for 3 to 5 minutes, it is not as noticeable and for the most part goes away. The higher I rev the less I hear it. A) Your start-up noise went away. put a water pump on it and i bet it goes away. Subaru Knock Monitoring FAQ Last Updated: 6/30/2011 Brief Background Thanks to the power of the AccessPORT and AccessTUNER software, it’s now easier than ever to gain unparalleled insight into the current status of your engine’s tune and running condition at any given time. The underside of the mo wer deck will collect a build-up. The noise comes from deep in the bowels of your motor. Any idea what I'm looking at here? Haven't really been able to conclude anything and not sure where to go here. It will not go away as the engine gets warmer. Noise goes away while driving or at high rpms and there are no engine codes or check engine lights. Engine speed should be kept under 3,000 RPM until the noise goes away. And it only does it under heavy load, not every time I'm in that RPM range. If your engine is idling at 600 rpm (and therefore that is the crankshaft rpm), the sound will occur 10 times per second. Clear away heavy build-up of grease, oil and dirt, especially in the engine and under the seat platform areas; minute dust particles are abrasive to close-tolerance engine and hydraulic assemblies. 5k RPM (every time i would stop and. 2L engine may exhibit a rattle or rapping type sound during cold operation at light loads and speeds from Idle- 3000 RPM. Engine (I5) making "ticking" noise at low RPM. Frankly, the system should react so quickly knocks are eliminated. See your Ford or Lincoln Dealer for complete details and qualifications. Random — The vibration/noise comes and goes with no obvious connection to engine rpm, vehicle speed or driving conditions. If your engine belts squeak only when damp, you probably only need to have the belts adjusted. Needle Valve - Adjustment on a carburetor used to set proper fuel/air mixture. Oil pressure did rise slightly when I brought the RPMs up, not a ton though, maybe an extra 10 psi. it doesn't matter if the engine is cold or warm. If the noise goes away, it's a chirp. If some are worn out or broke it may make funny noises. My first question was answered 93 octane. If I let off the accelerator the noise goes away. High pitch noise at 3000 rpms. Problems and defects are expensive. Engine ID codes for the T/A 6. It goes by several names — knock, pinging, detonation, etc. but the cam phazers i have heard are not normal its a distinctive knocking noise that will go away if the engine is revved to 1200 RPM or higher. I can hear the noise while idling in drive, idling in reverse, idling in neutral, idling in park and traveling under low throttle and/or power in any gear(it is especially loud when the. Having a bad rod bearing could cause a truck to make a loud knocking noise and shake when driving at high speeds. it got this semi high pitched rattling sound. A prop shop can build up diameter and blade area to original specs. Speeds of 65+ in 5th, less than that and it was substantially less noticeable. Engine knocking noise - suggestions please Just be careful because it could throw the rod at anytime especially during high RPMs so you might want to take it easy. when the engine is cool, there is no knocking, but once it gets warmed up it starts aknockin'. The last few weeks I've had a high pitch whinning noise from the engine. Try fuel from different pumps and stick to the one the suits your car the best. Try a fuel stabilizer or just go down and drain all gas and go unleaded normal octane. The engine has 224,000 miles on it. Please notice that the engine is supposed to be running and the law has no provisions for parked vehicles. See your Ford or Lincoln Dealer for complete details and qualifications. Re: 1989 YJ Wrangler- high pitched whine It might be a bearing in your alternator,water pump, or some other device thats driven by a fan belt, or maybe the bearings in the distributor- i've seen that before too. The DISA valve is a component situated in many BMW intake manifolds, and is vital to the smooth operation of the engine. This time I ran the rpms up to show how the ticking noise tends to go away at higher RPMs. the knocking takes away a bit of power to. Engine Knock please help 2003 TrailBlazer for the upper part of the engine. I had a knock in my flathead that could only be heard when I first started engine and when I got above 30 mph. The time between the knocks is roughly half a second at idle, slightly faster with higher rpms. BAKER Drivetrain offers custom Harley-Davidson transmissions and parts. The intake valves are open for a longer period of time to produce more power. The easiest way to determine if you have an exhaust leak instead of a major engine issue is to gently rev the engine while in park. Strange!!!. The day i was riding it home from the dealer i noticed a light rapping nosie as 3K RPM was approached. Engine noises could mean anything from tight belts to dying motors. Re: Knocking or Hard Rattle In Outboard Its hard to explain its more like a soft knock or rythmic tic that goes along with the rpms. What it sounds like is like a hollow tap / knock, as if you were tapping a hammer on a piston. But once it warms up a bit the noise goes away. With engine idling, lifters with excessive leak down rate may be spotted by pressing down on each rocker arm above the push rod with equal pressure. Some engine ticks may only occur when the engine is under load, so if you don't hear the ticking noise when the car is idling in park or neutral, find a safe spot in the driveway or the street with nothing in front of you and try giving it some gas in drive with your foot firmly on the brake. You could feel it "tickle you" through the seat, if you know what I mean.