Hi All, Got a 2005 M3 in today at my shop, Customer told us he overreved and the dealer would not warrenty it and he needed a new engine, found out that its got two codes p0012 and p0014 both camshalft postion sensor on a over advance and one is over retarted, so the chain skipped a tooth, now i do have a few questions about setting this back to tdc... Do i need a alginment tool for the cams, Where are the marks on the engine/cam sprokets? How do i go about doin this also.. Thanks for your help...

you are a tech and you're asking us? I don't mean to be a dick, but if I found out my mechanic was getting his answers on car forums I'b be worried.

Yes I am a tech I am a Porsche Tech...I need to know if i have to buy the camshaft alignment tool? And where the marks are to line up tdc...

Since you will be dealing with a VANOS system - variable valve timing, I'd suggest you pony up and pay for a manual. Asking for this level of help on a web forum shows real optimisim or ignorance of what you're asking for.. one or the other, but in any case - this isn't a job you can do without the manual.

It also is highly unlikely (to downright impossible) that the cams are out of sync with each other or "jumped a tooth" - the chain between the two cams is very short, double-row and no way it can jump a tooth.

The normal results of an over-rev are bent valves, damaged pistons and sometimes lower end damage.

The best fix is an engine from a wreck.. by the time you discover all the very expensive parts that need replacing, and the labor involved, you'll find it's a false economy to try to fix this engine. A long-block from a wreck will probably set you back around $5k - cheap IMHO compared to fixing the over-rev'd engine.

Wow...if I found my mechanic asking questions like this on a forum I would freak.

I am not in any way challenging your abilities. But I, as a customer, would always take my car to the appropriate mechanic. I for one, wouldn't take a Porsche to a BMW mechanic or the other way around.

The advice I would offer is instead of trying to make a buck off your customer, recommend a good, experienced BMW mechanic. Would you trust a BMW mechanic to work on a Variocam car? I don't think so.

Your Both right i'll have to talk to the customer tommorow and see what he wants to do...