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Typically not enough oil. Bad spark plugs or the wrong grade of gasoline or a bad O2 sensor can also contribute.
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What would cause a loud knocking noise in engine upon starting?
Running too lean.
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.
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.
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.
Knocking in the bottom of the engine?
knocking noise
What cause the engine to have a knocking noise on 3.0 liter Toyota Avalon?
Crank Shaft.
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?
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 your engine has a knocking noise?
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.
What would cause a knocking noise when the engine is warm?
maybe the carberator i dont know im not a machanic or anything
What could cause a whistling noise while running air conditioning?
A bad compressor belt can cause a whistling noise while running the air conditioner. A bad engine can also cause this noise.
How do you fix a knocking noise in a 5.3 Chevy engine?
sell it
