the engine rattle when I start

[Daniel R]

Originally Posted by BYprodriver

Maybe a chain tensioner?? I would fix this problem A.S.A.P. take it to the most qualified mechanic/shop you can find, it will be cheap compared to waiting. I would stay away from whoever said it could be "a bent conrod"

The guys that suggested bent conrod are in fact the best guys in town for Porsche! Why they would have suggested such a thing I have no idea, I am not thoroughly informed when it comes to these things so I will take your word for it that it is a ridiculous suggestion.

What does replacing chain tensioners entail? Just a rough guide to labour hours, I can search the part prices online.

Thanks.

[autodoctor911]

my 99 with 140k miles made the same noise on startup for 1-2 seconds. but I switched from that awful mobil one 0w40 to lubrimoly 10w60 gt1 full synthetic. I think it came out for bmw m cars. anyways noise is gone. I will do an analysis as soon as I get to the track.