- General Information

NOTE: Some engine noise is characteristic to the design. Compare the sounds in other engines in order to make sure that you are not trying to correct a normal condition.

1. There are four steps to diagnosing engine noise, they include:
^ The type of noise
^ Under which operating conditions it exists
^ At what rate, and at what location in the engine
^ Compare the sounds in other engines in order to ensure that you are not trying to correct a normal condition.
2. Remember, engine noise is generally synchronized to either engine speed (caused by the crankshaft, connecting rods or pistons) or one-half engine speed (valve train noise). Try to determine the rate at which the noise is occurring.