TinyPP

if a publicly viewable spreadsheet is started I would recommend adding the following:

• Year of Manufacture
• Original engine serial #
• Replacement(s) engine serial #
• Mileage
• Track/No Track use
• US vs International
• Cam & FF catastrophic failure (Y/N)
• Other

My thinking is that with enough data we maybe able to extract "unknown to us" but "known to porsche" the probability of failures based on the various FF suppliers where metallurgy based INCLUSION anomalies may exist.

TPG

in one year 413 engines.

​​​​​​​Like I posted above. My engine was replaced 1/22 G61355

BryanCO

What's the probability of rod bearing failure in an BMW S65? From what I've read over the years (admittedly, I don't own a .1 and don't follow the issue extremely closely), the .1 issue is similar in the sense that its a design (material selection, tolerances, etc.) as opposed to a part defect (batch issue effecting a set of parts). Therefore all engines are at risk of failure and, hence would be expected to fail with the timing based on use conditions.

TinyPP

I agree with your comments. Plentiful Data however is essential to an educated guess and deriving at a probability of failure. As an example, if someone's engine serial number happens to fall within a range of documented engine serial number failures, then one can postulate that the same FF's came from the same supplier and then decide to either ride at 9000 rpm's until the engine fails, sell the car or perform a Thelma & Louise.

rickster997

@Mthrice it looks like you've had a G6 for several years. Do you track it? If so, how many events in the last 2 years?
@Jickel180 seems like you have 3 years. Do you track it? events?

Jickel180

Yep, I daily drive and track this car. I've racked up 20k street miles and 1700 track miles on the G6 alone. Only issue I've had with the G6 was a failed bank 2 cam position sensor at the track which ended my day early. Easy swap once the part arrived.

GT3_991.1

My car had 28k kilometers on original 2014 engine before G6 replacement last winter

Dub911

I've owned three E92 M3's and personally I believe that the rod bearing issue is greatly exaggerated. I've been around many of these cars and spoken to several BMW techs about the problem and have yet to encounter anyone who has experienced it first hand. On the other hand, I think that the 991.1 issue is underrated and for most of the GT3s of this era its just a matter of when, not if.

GT3_991.1

I agree with you on GT3 part - I think every 3.8 engine that was not replaced with G is affected and entire case is underrated.

I do not agree on BMW though. I owned S54's, S65's and S85 (just one thank God!). I love M3's, but rod bearing issue is real. It all depends on use, and milage - and fair to say in S65 I replaced them in the nick of time. They were so worn, main bearings had to be checked (and yes changed too). Car had 100k miles - a lot of them heavy track use. 10w60 and always warmed before hard driving.
I noticed cars from warm climate do not suffer as much as those, that are going through cold starts in low temperatures. I experienced S85 bearing fail. Just change them every 100k kilometers.

Mthrice

9k miles and 8 track days. No problems at all, and .2’s don’t pull on me either.

rsbenfield

G60392 - replaced April 3, 2020. 7K miles, multiple track days, no issues.

sbonomo

Hmmm, my engine was replaced in Dec 2016 - due to the local privacy laws i don't know exactly how many miles (i bought this used) it had. That would put mine squarely in the F-series right? Thank goodness i still have 2-years left on the warranty.

rickster997

Update. Got my car back today! Really missed driving and still miss driving at WOT! Already signed up for PBOC at Sebring in September. Need to break it in before then.

rickster997

Final update. Put it up on the lift to make sure the right engine was in there. It was. I'm good to go.

leozip

Just bought a 2014 991.1 GT3 with 18k miles, apparently oem engine still. warranty on motor good until 07/24. I will try to have my tech check on the engine to make sure its the oem or revised version. So lets see what happens.