Onami

I keep seeing relatively low mile (40K miles) 993 Turbos that have had a top end rebuild. Is this a hit and miss thing or is there something more behind this? I don't see nearly as many NA 993's with the same condition, can anyone explain why this is the case?

Quadcammer

You've had 993s before and therefore know the valve guides are a crap shoot. Some go earlier than others. Maybe the car was tracked, maybe it wasn't...get a decent ppi and go from there.

I see less turbos with top end work personally.

Onami

Thanks. It just appears that there are more lower mile TT's with top ends than NA cars, but maybe that is just a small sampling and not indicative of a problem????

ca993twin

A missed shift can lead to a top-end job, but also a missed diagnosis. I think the 993TTs are VERY robust.

Quadcammer

records of the top end would offer some explanation of what happened (i.e. were valves replaced)

AC/911's

I had a 68k & 120k , both had compression above 135 on original top ends.

Turbodan

I believe it is most likely from missed shifts.

Onami

Thanks guys. I appreciate the responses.

Texas993

Which is why I don't let anyone drive my car. There are many expensive mistakes on these cars.