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Matt, Mechanical Engineer
Category: Audi
Satisfied Customers: 22734
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Audi a4turbo 2001 My car makes a knocking noise from the top

Customer Question

Audi a4turbo 2001 My car makes a knocking noise from the top back end of the head only when it hot if you increase the revs slightly it quietens down
Submitted: 2 years ago.
Category: Audi
Expert:  Shantal-Mod replied 2 years ago.
I'm Shantal and I'm a moderator for this topic.
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Customer: replied 2 years ago.
Still need a answer please
Expert:  Matt replied 2 years ago.
hello this could be a failing variable cam actuator, this would be at the belt drive end of the engine if this was the caseI'd suggest using a long screwdriver like a stethascope to try and pinpoint the noise of the location on the enigne trying thicker oil is a good idea but if it is the VVT actuator then it will need replacing - I would also expect to get a fualt code regarding cam timing issues?
Expert:  Matt replied 2 years ago.


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