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When your engine has a knocking noise, it could mean that a rod has been thrown. It could also mean you are low on oil.

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โˆ™ 2014-08-21 08:53:55
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Q: What does it mean when your engine has a knocking noise?
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There is a knocking noise in the motor of my 1992 town and country. Could this be the transmission going?

NO. A knocking noise in the engine is a problem in the engine.

What does it mean when there is a knocking noise from the engine when you let off the gas?

A bad connecting rod bearing can do this

Can a bad harmonic balancer make a knocking noise?

A bad harmonic balancer can cause a knocking noise. The harmonic balancer doesn't actually produce the noise, but it can cause the noise in the engine.

What does it mean when you hear a knocking noise underneath and in the back of your engine you think its piston or?

It can mean that the engine has a bad main bearing. Can also mean one of the pistons are bad.

You hear a knocking noise that follows engine idle and acceleration what could it mean rocker arm?


What does it mean when the transmission light comes on and the engine makes a knocking noise?

Your transmission fluid might be low.

How do you fix a knocking noise in a 5.3 Chevy engine?

sell it

Knocking noise when accelerating?

The knocking noise is commonly called spark knock. The knock can be called by the engine timing not being set correctly, or using gas that has too low of an octane for the engine.

Knocking noise while accelerating?

A knocking noise can occur from worn engine mounts. When the rubber insert on the engine mounts are old and brittle the chassis is not protected from the weight of the engine. Creating loud vibrations that get louder as the vehicle goes faster.

What would cause a loud knocking noise coming from the engine at 70 mph and make the truck shake very badly?

Having a bad rod bearing could cause a truck to make a loud knocking noise and shake when driving at high speeds. The engine having a coolant leak or an engine timing problem could also cause the knocking noise.

What causes a knocking noise under the hood of your car?

it could be your valves or your engine

Noise coming from engine in Oldsmobile cutlass?

Noise coming from engine in Oldsmobile Cutlass could be as a result of an oil leak in the rear of your engine. This makes the gears to wear off leading to severe knocking noise.

What would cause a knocking sound when not stepping on the gas?

can you elaborate? engine noise? stationary/moving? ticking, tapping or a definite knocking?

What cause the engine to have a knocking noise on 3.0 liter Toyota Avalon?

Crank Shaft.

Engine knocking in a 1992 Crown Victoria?

depends on what kind of knocking you mean. lots of engines can have what we call "piston slap" when the engine is cold and goes away in a few minutes when the engine warms up. If the noise stays and is worse when revved up you have a more serious problem.Hope this helps

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.

Can the timing chain on a 92 olds cutlass ciera cause knocking noise at idle-- the noise disappears when rpm is increased with the serpentene belt off there is no knocking noise with engine running?

Sorry, disregard this question, I didn't word it properly.

How do you fix a knocking noise coming from engine?

Cant you just ask the people at the car place?

What would cause a loud knocking noise in engine upon starting?

Running too lean.

What is the knocking noise in engine 3.8 liter Pontiac grand prix?

Replace the Harmonic balancer

Why would the engine of a 1997 Chevy Cavalier make a loud knocking noise even after being told that there is nothing wrong with it?

it's probably a rod knocking

When starting my engine I hear a knocking noise and when I start driving it kinda fades I own a 2001 Chevy Malibu?

if its a low knocking noise it is normal on the 3.1 engine!! if it is loud check to make sure the valves are getting oil!! I have a 2000 Malibu v6 and it is the same way.

If car is making a knocking noise?

possibly distributor. tow to mechanic . if you drive , you could damage your engine.

I have a Knocking noise in my montero sport 2000 engine but goes away when hot?

Look into piston slap

What is the knocking noise vehicle is making?

Depends on where the noise is originating from, a suspension component, engine (top or bottom?), steering knocking when turning, going over bumps, etc. You need to provide more details before I can point you in the right direction.