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hollany

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  1. OK Thanks. It is a tiptronic and there's no play that I can see. I should add that it sounds like it's coming from the center of the engine. Possibly the intermediate shaft chain area but the chain and tensioner look ok.
  2. Thanks for replying. RMF, could you explain your answer a little more? I'm not sure what you are saying. JFP in PA the camshaft deviation was around 3.5 degrees at idle which I thought was ok. I thought it might change when I revved the engine but I'd heard that 6 degrees was the top end of tolerance. Regarding the steel liners, its quite a common repair over here in the UK and I've never heard of a problem. (There's a first tme for everything though.) Thank you again for your time and the welcome. Kev
  3. Guy's I need help. I have recently replaced the pistons and sleeved cylinders 4-6 on a 3.8 Carrera S for a customer of mine. The car came into my workshop with the usual symptoms of bore score, a heavy knocking sound which gets worse as the car warms up and the left hand tail pipe much darker than the right. The car was making a terrible noise but I've done a few of these before without any problems and I was sure this one would be the same. Sure enough cyl 5 & 6 were very bad so I sent that side of the block off to my machine shop and they put steel liners in all 3 cylinders. I replaced the pistons and rings (Genuine Parts) and rebuilt the engine. All looked good and before I gave it back to the customer I gave the car a run home. The car drives really well but with one small problem. If I blip the throttle quickly there is a heavy knock. It knocks once as I press the throttle, not on over run but everytime I blip the **** thing. The thing is I'm not sure if the noise was there before I stripped the engine. It was making so much noise I doubt I would have noticed it anyway. I have listened to it with a stethoscope and it sounds like its coming from the intermediate shaft but I have never heard this noise before and I was wondering if any of you had. I have removed the tensioner and it seems fine. In a moment of self doubt I convinced myself that it was an assembly issue so I removed and stripped the engine again. I can't see anything wrong but I don't want to stick it back together before I've heard from you guys. Hope you can help. Kev
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