Swedish Paul
Member
- Messages
- 1,811
That’s interesting to hear, because my next car will be a 911 or cayman. I have considered that post 2009 is a better bet. I am researching between the 4.0 or the 3.0 turbo. I’d be interested to know what you think.Afraid I disagree. Having been close to the M96/M97 engines for a while the issues are real and not purely down to abuse during warm up. There are examples of careful owners from new having bore score at 7000 miles replaced by Porsche under warranty only to have the second engine go at 30k ish miles of careful warm up. The issue is real and down to a design flaw. Hartech are the experts with the issue and I have 2 mates with new Hartech engines (one a 996 C4S who’s IMS let go and the other a 997 Carrera 3.6 with bore score). For many years I put it down to internet hype but now believe it’s a real issue in a significant proportion of that generation of engine. Bore score is the harder one to avoid as an upgraded IMS is relatively affordable. There are engines running great with 100k miles plus but that doesn’t mean you can ignore the risk. A full Hartech rebuild for borescoring can be done for around 10-12k the upper end results in a bullet proof block. In saying all of that, for me the 996/7, and 987 represents good value if bought at the right price / condition with a war chest to cover the potential rebuild cost as they are relatively cheap to run otherwise. I also believe the the smaller boxster/cayman 3.2, 3.4 and 2.7 are less commonly known for bore scoring than the 3.6 and 3.8 lumps. Autos are also higher risk apparently due to lugging the engine under high load at low revs for eco reasons in the gearbox programming.
BTW I have a 997.2 GTS manual which is a completely different engine (9A1 I believe) does not seem to suffer these issues and has no IMS as such