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Q: What causes a knocking sound when you just start the car?
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Why does your engine make a knocking sound when you accelerate?

When you accelerate. you are putting presure on the main engine barrens. if they are going bad. You will hear this knocking sound. I don't know how many miles you have on this engine. But that's what it sounds like. But that's not all that can make this sound. You will have to tell more about it and when it started. Did it just start all at once? or did it start and then get louder?


What causes a knocking sound in your car?

many many things, Loose lug nuts which lets wheel make knocking noise. Engine will make a knocking noise if it is really low on oil. Some timing belts make a knocking, slapping noise just before they break.These are just a few examples . Have someone ride in car with you as you duplcate the noise and see if they can determine which part of the vehicle it is coming from.


Why do you hear a knocking sound by the tire in your car after crashing?

Because it just does. That's why.


What is the knocking sound on a 350 chevy it sounds like a rod but then it stops rods dont just stop knocking do they?

Some causes will:A leaky lifter will pressure up and quit, and can sound like a rod knock when the clearance is bad enoughA collapsed piston skirt will quiet down when the engine warms upA rod can knock under load or start up and quite down when oil pressure is applied. Its only going to get worse though.


What is a knocking sound on a four wheeler?

that knocking sound could be the connecting rod knocking because of the bearing being warn out do to low oil pressure or no oil all together. also it could just be the valves. some people hear the valves ticking and think its knocking. i have had many friends think that. valves ticking is a simple fix. just look up how the valves are suppose to be adjusted then take off the valve covers and with a feeler gauge measure how big the gap is.


What would cause a knocking sound on a 99 Isuzu rodeo v6?

If it's knocking it's probably a rod going out - if it's ticking it could just be the valves - Rodeos are notorious for value noise...


What is the knocking sound on a 350 Chevy it sounds like a rod but then it stops rods don't just stop knocking do they?

Sounds like your lifters are bad and might need ajusted or changed, it could be your cam not looping.


Your car had a faint knocking noise which got louder when accelorating then it just wouldn't start until you added oil stabaliser but it still had a knocking sound?

Sounds like you might have blown the motor, thrown rod, spun bearing, etc. Drive it by a local shop, for something like that, it should be a free second opinion of whether or not its repairable.


Why 5 speed manual transmission has knocking sound when gear engaged Knocking accelerates with vehicle When you rev the engine while clutched no sound When you clutch and coast no sound?

it sounds like a bad throw out bearing or clutch plate. not a major deal it just starts to get louder but eventually you going to have to replace it when you do your next clutch job. chris


What would cause a knocking sound in the rear of the vehicle?

you re rear axle i just replaced mine it probably the front pinion bearing


What is the red line on a 1988 Chevy s10 2.5L engine?

5500 RPM or 5 RPM below the banging knocking sound you just had .


What could cause a knocking come clicking sound under the dashboard without the engine started and just the electrics on?

if you have an electrical fuel pump can sometimes do that