Ok so i got a question. When my car is fully warmed up there is a sporadic faint knocking sound at idle coming from the engine. The motor is a 90' m20. Does anyone have any thoughts as to what this is. Its late and i just got off work so im not really to keen on searching, any help would be greatly appreciated.
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Try to find out where in the engine knock is coming from, Here's a trick, use a piece of broomstick or a big screwdriver, and press the handle to your ear and the tip to the engine. This wil let you listen inside the engine a lot clearer.
Put the tip of the screwdriver/stick in different areas of the engine until you can here the noise "near"
You can also use a hose as a listening device
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