Correct timing marks
SOURCE: audi a3 tdi 140 turbo sounds like its whistling
Turbo vehicles often sound like they are whistling when the turbo spools up because it is sucking in air at a high rate and it makes a bit of a whistling sound. Generally not a problem unless it is a different whistling that you are referring to.
SOURCE: audi 2.5 tdi timing marks
timing marks are on the cam and crank gears behind the timing cover
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