I have a 98 chevy 2500 pickup. i can hear a knocking noise in the engine during accelleration.when i accellerate the knocking increses.when i get off the gas pedal.the knocking slows down,but still knocks during idle.
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Re: knocking noise in the engine.
Knocking Noise Is NOT a Good or Normal thing I will Not try and Diagnose it But I STRONGLY Suggest That You Stop By A Couple Service Shops For a EAR ON Check for this KNOCK and
I say A Couple Shops Meaning 3-4 So as to get The right Diagnosis
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Hi, I know a trick to adjusting your timing. you will need an assistant. if the truck has an automatic transmission, you can have someone put the vehicle in reverse or drive, keeping the brake pedal pressed down firmly, press the accellerator pedal, advance the timing by turning the distributor, until you get spark knock. Then turn it back just until the spark knock goes away. this may not be the factory spec, but it will give you optimum performance.
Is this during idle or while driving ? My older GM cars were prone to collapsed hydraulic valve lifters....usually from wear or lack of oil pressure to the lifters while idling.
If you hear this only while driving or accellerating.... it's likely a spark knock sound (Engine internal damage likely if you leave this situation unchecked) It may be a 'timing' problem. Get help soon !
A Turbo is standard on that model & if you're not used to one, it does make different sounds at different engine loads.
The Turbo makes a nice siren like sound at times when accellerating and especially when cold. If you only notice this on accelleration then try to not press the accellerator as much just to make note if the sound doesn't appear. I have noticed that if I let off of the gas & then press it the sound follows my action which confirms that it is that. Usually, the turbo will only make the noise on acceleration.
Of course any other noise should be investigated while the warranty is in good shape. good luck
have truck scanned for trouble code most auto stores such as auto zone/ advanced auto do it for free code gives u start point as to knock which is where code is coming from most knock noise is lower engine problems rod knock-wrist pin -main bearing going
it just may be too low of octane in your fuel. does the car require 89 or 93 octain gas? if it requires 93 octain gas and you are pumping 87 octain fuel in it to save money, you may pay for the savings later on. the pinging sound you hear when accellerating is the ignition of the fuel at the improper timing because of the lower octain. this will eventually damage the engine. since you say you hear this when you accellerate tells me that this may be the issue. hopefully this is what it is because it will be easy for you to resolve. hope this helps.