It looks like every newb starts with this question, is this DME good enough to buy? So here is a car I'm close to pulling the trigger on.
2008 997tt cab ~9000 miles, no condition issues, roughly $102k (orig ask was 117 then 105), single owner lease return to local dealer. high tech person with multiple nice cars. new tires, PCCB brakes 95%, new battery, (been sitting in dealership showroom for 4 months...hmm.) Porsche CPO and offering a Fidelity platinum 7 yr 70k mi additive extended which I plan to get.
DME:
Range 1 8649 237.6h
R 2 1546 219.0 h
R3 452 219.0h
R4 107 219.0
R5 17 211.9
R6 8 211.9
op hours 244.4
Type DME control unit _997TUS00

So clearly two events about 30 hours or ~1000 mi ago spending less than a quarter second above range 3, but it did register 8 ignitions at 6. but could these be errors? No flashing or obvious aftermarket mods that I see.
Will do a PPI to see what they think, but how about all of you? Do I need to force the dealer to do a compression check for me? will they? will they let my PPI guy do it?
Other thoughts? I will probably resell just before the 7yr transferrable warranty expires. Will use car as a DD and track once in a while.

Thanks,
Schnell

 

I would not, I don't think it can be cpo'ed with ranges above 4 or 5. The guy sure beat the crap out of that car, or he had a software and that's why you see those ranges.... I by no mean an expert but I'm sure someone more knowledgeable will chime in to correct me if wrong.

Good luck! I think you could find better deals out there on a cleaner car.

 

If dealer CPO'd the car with those readings they had to get "permission" from PCNA to do so - I'd ask about that. I'd also be worried that the mis-shift(s) occurred so recently. I bought a CPO 08 TT with readings in those ranges but not many and nothing in range 6 but they happened very early in the life of the car (about 5,000 miles) - I have almost 21,000 on the car now and it runs strong, never any issues. But if you think you're going to worry about the DME reading after purchase, I'd pass and find another. Good luck.

 

Can someone explain what DME means and what the R numbers are for, thanks

 

This topic is re-visited so often that I'm sure a search would get you more info than you ever wanted to know about it.

 

usually presence of any data in R4+ will result in deny of any engine related warranty claims. I would not do that, even if dealer promises 'no future issues' as it is not a dealer who decides later on a warranty coverage.

 

Pass - there are cars with clean reports to be had. Without opening the motor up you and the dealer have no idea what state the internals are in. His first priority is to sell the car; after that, maybe there are issues; maybe not. If the motor grenades, it's doubtful Porsche North America is going to feel much responsibility to replace it free of charge with that history and they make the call - not the dealer. Keep looking.......

 

Perhaps the data on the DME readout is the reason that this car has not sold in four months. I would pass on it without thinking twice.

 

Thanks for all the great advice. I'm going to pass on this one. Spoke to my friend who races camaros in NASA and he said there is no way to reliably test for all the possible damage due to overrevs. He said the cylinder head is going too fast away from the crankshaft when the crank pulls it back that the rod is stressed over engineered limits. Micro cracks form in the hot metal and slowly over time (over many heat cool cycles) expand until full failure, who knows when. Also if the cylinder head and valve come in contact, the valve will suffer over stress, again cracks or out of alignment. I would guess you can probably find this with pressure testing. Too much to live with for my peace of mind.

 

I agree with the pass . The over revs are bad enough but I also urge you not to overlap CPO with an aftermarket warranty plan . It's an either/or but not both .
CPO is actually the best but with those high level overrev DME scan it's shocking that it would even be CPO'd .