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After talking with Charles and a few others over on Rennlist, they've more or less convinced me that my Cayman's engine was starting to develop problems about 18 months ago. All signs lead to bore scoring. If nothing else, some of you may find this discussion interesting:
That makes a lot of sense, and I am sure they are on target with that assessment. I also had bore scoring combined with bearing failure, I never took the time to figure out the relationship between the two, like the chicken-egg relationship, I just replaced the motor.
After talking with Charles and a few others over on Rennlist, they've more or less convinced me that my Cayman's engine was starting to develop problems about 18 months ago. All signs lead to bore scoring. If nothing else, some of you may find this discussion interesting:
So it sounds like an inadequate oiling issue then? I know it wasn't the IMS, but I wonder if this was the D chunk issue that plagued earlier Porsche engines?
Don't mean to rub salt in your wounds, but stuff like this really makes me stay away from Porsches, and really any Euro car (outside of warranty). If I had a dime for every time I heard engine issues are totally overblown, just look at the statistics! And then I see this with people I know, not just some pissed off random person who decided to vent on the internet. What makes it worse is that if/when something does go wrong, it just costs so damn much to address alot of the time.
So it sounds like an inadequate oiling issue then?
What i've read about the M96/97 is that oiling under heavy lateral load is very hard to address, even with baffles and aftermarket pumps. I've heard the only real way to address the oiling on the M96/97 for sustained long-term track use is going full dry sump.
What i've read about the M96/97 is that oiling under heavy lateral load is very hard to address, even with baffles and aftermarket pumps. I've heard the only real way to address the oiling on the M96/97 for sustained long-term track use is going full dry sump.
Well to be fair, alot of other cars have oil issues during high g sweeping turns, off the top of my head I believe the vettes since c5 had that issue, Zs, and even the S2000s. But in the case of the vette, in their Z51 and above trim/models, they offered a dry sump. But yes, disappointing that it was such an issue, made worse by it not being the only issue.
One of the key issues is the motor design, which causes the oil to foam due to crank whip, something that you can't address with baffles and a deeper sump pick up. The short of is what this guy says:
What i've read about the M96/97 is that oiling under heavy lateral load is very hard to address, even with baffles and aftermarket pumps. I've heard the only real way to address the oiling on the M96/97 for sustained long-term track use is going full dry sump.
List car for sale at a price I'd be happy with, as well as with an option for the car without aftermarket goodies (I have all the OEM parts). Would list prices for the parts as well. Some are easy to remove, others (like the coilovers) would be a bit of a bitch. And if I get no bites on the car in 3-6 months, then I'll look at replacing the engine with another used (unmodified) M97 and just sell the car, for hopefully less of an overall loss. 3rd option, putting a built engine in it, is tempting....very tempting, if I want/plan to keep the car forever. However, right now I'm of the mind that I might want to own another sports car. Also it would take me some time to plan for such an expense.
I think option 1 is the way to go. Get what you can out of the roller, and then decide later your next move. I'd honestly be surprised if you would come out ahead having a replacement motor installed. Yes, it would sell for more, but I doubt you'd recoup the full cost of putting the motor in. A built motor is just going further down the rabbit hole.
Someone made a good point in the Rennlist thread. The 9A1's oiling system is probably an order of magnitude better than the M96/97. I tracked my Cayman a handful of times, but only on street tires for this reason.
12-14-2020, 08:56 AM
