Question about 2001 Audi A4
To be honest without hearing it myself its difficult to diagnose ,this could be a one of them catch 22 things where you repair the obvious and it ends up something so obscure ,all i can suggest is the manifold gasket for a sucking noise if the pipes ok or the one thing that comes to mind is the valves ,they could be not seating right for whatever reason ,broken cam belt in the past with a previous owner?? cracked valve seat?? ,broken cam shaft retaining caps ?? hole in a piston crown?' sorry but without seeing it myself iam at a loss and i honestly do not think anyone can know the answer without seeing it .These engines do suffer from valve /head problems if given a good hammering trying to have a go at a jag or porsche on the motorway .
Posted on Sep 03, 2010
This is the normal sound of the air admission in the turbine - it's sucked with a very high force so it makes a lot of noise. If the noise is very loud with the air filter inserted then the air pipes from the airbox to the turbo have a leak - check them and replace and refit if necessary.
Posted on Sep 02, 2010
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Posted on Jan 02, 2017
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