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Do you realize that with number over 1000 in the Type 4 range that this engine has been 1000RPM's over the stock Rev limiter? That is alot of stress put on the rod bearings, vario cam modules, inlet tappets and chains..
My recommendations are to look for a car with 1, 2 , and 3's.. Forget the 4's and above..
I was on the phone with a Rennlister this morning, with regards to his engine failing. Broken timing chain... The engine is a write off.
I was on the phone with a Rennlister this morning, with regards to his engine failing. Broken timing chain... The engine is a write off.
As much as we value your experience and information, this doesn't really tell me anything other than you were on the phone and an engine failed because of a broken timing change. Since the discussion is over revs, are you saying that over revs caused this engine failure?
Missed shift.. Forced overRev.. The chain did not break immediately, it did break within 15 minutes of driving..
It was a missed upshift.. Fourth to fifth, but hit third...
In normal applications these engines will handle most upshift redline overLimits. We see the numbers in the Type 1 and Type 2 with brief Type 3's (low numbers).. When you start to see Type 4's and over you have missed shift situations. The stress on the rod bolts, chains, variocam and dual lift inlet tappets accumulates. If you want to minimize your risk, look for DME reports with Type 1, 2, and 3's..
Missed shift.. Forced overRev.. The chain did not break immediately, it did break within 15 minutes of driving..
It was a missed upshift.. Fourth to fifth, but hit third...
In normal applications these engines will handle most upshift redline overLimits. We see the numbers in the Type 1 and Type 2 with brief Type 3's (low numbers).. When you start to see Type 4's and over you have missed shift situations. The stress on the rod bolts, chains, variocam and dual lift inlet tappets accumulates. If you want to minimize your risk, look for DME reports with Type 1, 2, and 3's..
So the chain broke within 15 minutes of driving? you mean within 15 minutes of the overrev occuring?...if over revs happened many hours ago is it still an issue?
Yes, the chain broke 15 minutes or so after the overRev... Edit Forced OverRev=mis shifted 4th to 5th but hit 3rd..
Did you have a forced overRev hours ago?? It's a crap shoot. One of the first signs of concern is a CEL showing camshaft deviation.
Folks, my main focus with my replies it to toss caution into the wind with new purchases (used cars). Do your best in finding lower risk vehicles. Buying a low mile car does is not risk free when you have Type 4, 5 and 6 overRev events. There is greater risk to your wallet.
If you own the car already, and have a mis-shift event. It happens.. Take a oil sample and send it to Blackstone. If you post your results or email it to me, I will help you with it. The first sample is a baseline. The second sample will show a trend. I have two oil samples that I took with the new car that I bought. At the PPI you don't have to drop the oil out of the engine. You can pull the turbo sump tank plug to get a sample out of the engine.
Could someone comment on this DME report? This is a 2019 Carrera T. The sales person said I should not consider this car because of the DME report. Is he right? Thanks for help.
Last edited by merbesfield; 11-16-2022 at 12:17 PM.
You might want to post this in the 991 section, I have no experience or knowledge of the turbo engines in the 991.2 cars.
I will say it looks odd to me to see more range 6s than range 1s.
02-25-2013, 07:08 PM
