Engine failure

[Tom]

There are 7 failures now

On RL? Makes the GT4RS even more intriguing, although if they really start selling for over $200k, I'd rather let Porsche swap out one of these motors and extend my warranty....

[808c2s]

There are 7 failures now

On RL? Makes the GT4RS even more intriguing, although if they really start selling for over $200k, I'd rather let Porsche swap out one of these motors and extend my warranty....

Yup, on RL. They’re keeping a list of affected members. At $200k for GT4 RS, yeah, I rather take my chance with a GT4 pricing

[Bill in Bama]

Another one bit the dust. Report on RL of another 4.0 oil pump failure, dealer already tending to it. These are becoming somewhat disburbing since Porsche has made no public announcement, TSB, etc. I realize there are big issues I'm not aware of and things I'm not privilidged to, but unless they KNOW that all the bad pumps will fail within the warranty period this is bad news for owners and certainly not good for future sales. Its beginning to look like the IMS situation where nothing was done/admitted by Porsche and while I realize the actual number of failures due to IMS is small it has received tons of bad publicity and the forums are stuffed with info, both good and bad, and rumors, innuendo, etc. I have to assume my new engine is solid, and I have a six year warranty on my entire car now, but there are conceivably a few cars approaching the 50k mile mark by enthusiastic drivers with original oil pumps that are suspect. What am I missing?

[Chulander]

I'm glad that Porsche has come through to offer some compensation for all the trouble. I'm watching this unfold on RL, and I'd be lying if it didn't give me a bit of concern for my own car.

But not sure I can do anything proactively about it other than keep an eye on the oil pressure?

That, and have my AAA card at the ready.

[Bill in Bama]

Actually, watching your oil pressure won't help. By the time it's dropped to zero the engine is already done.

[J2+]

Morning All, I have a 2023 GT3 Touring with "over the threshold" for oil consumption ( greater than quart/738 miles ). It took about 15K miles to get to this point ( no tracking but running to redline on the street through the first three gears much of the time ). The issue is the failure of the Sumebore cylinder coating when it is applied at the factory and not at the precise temperature required. Porsche AG sent out a bulletin at the end of last year saying all their engines will exhibit plasma transfer wire arc oxidation ( the result of the application failure of the Sumebore coating ). The Sumebore coating is porous and that ensures the oil is protecting the pistons and rings during combustion when applied to standard. When it is not applied to standard, cylinder pitting can occur leading to excessive oil consumption. Porsche AG's decision in my case is to replace the engine cases and all engine internals except the crank shaft and titanium con rods under warranty. That work should be completed this week. I have been without the vehicle for 2 months as all the initial exploration, authorization to fix the engine, parts arrival and engine reinstall takes place. My dealer, Porsche Southpoint, Durham, NC has been terrific in this adventure ( we did several oil consumption tests along the path of increasing consumption before arriving at 600 miles/quart most recently, triggering the engine rebuild ). I speculate there are numerous 992 GT3s manifesting this engine issue that will never be discovered due to limited use and/or lack of focus on oil consumption. When we started ordering replacement parts there was a cue of 15 992 GT3 engine cases at that point. I am not an engineer but have learned this through aggressive pursuit of what I thought was excessive oil consumption even recognizing NA engines will use more oil in general. I currently own a 991.2 Turbo S also and owned a 991.2 GTS that I traded in on the GT3 Touring. Neither of those vehicles use/used any oil between annual changes. Relatedly, see Rennlist similar reporting on this issue.

Here's the follow up All, After $56K of warranty engine rebuild, I now have the "new engine" run in. Thus far ( 1300 miles on the rebuilt engine ) there is no measurable oil consumption. The engine runs noticeably smoother than before the rebuild. I ran the engine in using Andy Preuninger's protocol. The engine was rebuilt by Daniel Wendel the shop foreman at Porsche Southpoint in Durham, NC who is a "very special talent". Hope this post helps others who may find their 992 GT3 engines in similar shape as mine was.

[blueline]

@J2+

Good info - always helps to hear from personal experience. Thanks for posting that.

[Throttlesteer]

Sounds like a totally separate issue altogether. Did anyone ever nail down whether then connecting rod issues were limited to 2020-21 4.0L motors, or is it still a problem with the current model year? I remember a few 981s having a similar issue, to be honest.