Maxi_z

Is there any info about the possible cause of the reported failures of some GT4 RS engines ?

Would it be usually related to some loss of oil pressure or failure of an oil pump or is it usually related to some mechanical failure as a conrod ?

In case it would be some part of the oiling system it would be interesting to know if the parts failed are different to the ones fitted in similar engines as for example 991.2 GT3 RS and also to know

if there are an updated parts with updated reference numbers from Porsche

In that case someone especially if out of warranty could buy from his pocket an eventual updated oil pump for example

stressless

Porsche typically is not going to allow the dealership to tear the engine down and determine the cause(s). They will require the dealership to send the old engine back in the same crate that the new one came in. Mine made a noise like a conrod would but not sure that would trigger an oil pressure warning. Knowing Porsche as they are now they are going to be tight lipped about this if there truly is a systemic problem. It will be awhile until we know all the facts - just saying.

0-Day

I've said it in other threads related to the other 4.0 engine, but just a reminder....

Catastrophic engine failures represent a major auto safety issue. If you are a USA resident, report all engine failures and how it created an unsafe situation for you to NHTSA here:
Report a Vehicle Safety Problem, Equipment Issue | NHTSA

People reporting these issues to NHTSA, the regulator, is the only way that Porsche will relent and 1) tell us what the problem is, 2) extend warranty on engines, and 3) maybe do a recall.

And just to be clear - If you are reporting to NHTSA, you need to make clear what the safety issue was in your complaint.
NHTSA does NOT care that your engine blew up. NHTSA is NOT a consumer protection agency. They are a public safety agency.
NHTSA DOES care that your car lost all power while you were driving and caused an unsafe situation on the road and/or in traffic.
NHTSA DOES care that your engine blew up and started a fire.
NHTSA DOES care that your engine blew up and dumped all its oil or coolant on the highway, endangering other traffic.

0-Day

And on a related note from last week...

Ford Recalls 91K EcoBoost Models over Potential Engine Failure (caranddriver.com)

"...Thousands of Ford EcoBoost engines are at risk of failure, which has caused the automaker to issue a recall. The issue involves 90,736 models, including some Lincolns, equipped with the turbocharged 2.7-liter V-6 and twin-turbo 3.0-liter V-6 that may have faulty engine intake valves.

Ford filed documents on August 23, 2024, with the National Highway Traffic Safety Administration (NHTSA). The affected vehicles are 2021–2022 models. The list of Fords includes the Bronco, the F-150, the Explorer, and the Edge. The list of Lincolns is limited to the Aviator and Nautilus. The F-150 has by far the biggest population that's potentially affected, with 47,719 involved in the recall. The Bronco and Explorer are next with 15,835 and 14,262 models, respectively. Meanwhile, Ford is recalling 2366 Edges, 7199 Lincoln Aviators, and 3355 Lincoln Nautilus models..."

stressless

Understood but my engine was still running as was all systems with no fluid loss. The warning just told me to get off the road and shut the engine off. Thanks for that information. Perhaps others to respond to NHTSA.

sunnyr

Wonder if the cars with issue had the new C40 GT oil or was still on the older C40?

stressless

Mine was the older oil as it was last changed by the dealer at the 1 year service in October of 2023 at 2100 miles. The oil pressure issue was in late August 2024 at 2300 miles.

GrantG

Unfortunately, changing an oil pump on one's own dime won't be an easy solution. Those are inside the bottom-end of the engine and require a major rebuild to exchange (unlike a water pump or other ancillary part).

GT6only

My car was manufactured in Dec 2023(should with the old C40), and got and oil service with the new C40 GT. I think they are the same oil actually.

GrantG

Somebody did a chemical analysis and the old C40 X3 is similar to the new C40 GT (but not identical)

Asiandude66

Took a look at the M1 website last night and noticed that the X3 C40 is no longer available to view on their website. the X4 C40 is there and available to view.
I am not sure what the difference is and if X4 came after X3 or replaced it...

9972RS

Do we think the wrong oil was used on the 4RS with blown engines?

stressless

Not sure and will probably never know unless Porsche opens up. Just got a call that my replacement engine is due in on Monday, September 16th. Will keep all posted. In the meantime what about you others waiting for engines? I have been very vocal with all involved including the dealerships, PCNA and PAG.

dmk2

Disappointing to hear about this. Hopefully Porsche will get you back on the road soon with some compensation and real reassurances that they will stand behind their product to give you peace of mind. Hopefully we don't see too many of these. Is QC suffering or are these isolated exceptions?

GrantG

The C40 X4 did come after C40 X3 and is designed for the engines Other than the 9,000 rpm models. The C40 X3 oil (previously used by all the sports cars) was replaced by 2 oils, the C40 X4 for the cars Without the 9,000 rpm limit and the C40 GT for the cars With the 9,000 rpm limit (which is now dyed Green, so Porsche can more easily evaluate whether the right oil was used for the car in question).