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Originally Posted by heiwaz
I haven't notices any power loss and the air filter is in good condition.
The IMS works perfectly, because I've changed it. I hear the noise before and after I changed the IMS bearing.
Where is located the air ventil?
Do you think it may be the chain tensioner?
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the vents I'm referring to are the crankcase breathertubes, there is one on the drivers side upper front of engine (underneath all the intake manifolds) and it crosses over to the AOS the other one has the AOS sitting on top of it.then there is a short one going just behind the throttle body. It is indeed a strange noise but with out hearing it live it's almost impossible to trace. Have the car put on a lift while its running and see if you can get a location of the noise. Chain tensioners? I suppose it's possible there isn't much of a fix for that with the engine in the car. See ifl you can get a better location. Sorry I'm running out of ideas.