UK 991 GT3. Engine 3 now fitted...
Discussion
I had the valve train problem on my UK 2014 991 GT3 and have just got my car back with a 2015 MY engine fitted. Porsche UK and GMBH identified the issue and authorised the new engine without hesitation. No talk of non disclosure and surprisingly zero talk of running it in. I have, of course, opted to run it in but it was totally left up to me if I felt like doing that or I could just go straight to the track. It was a non issue when collected and a conversation I had to initiate that yielded no answer.
I had to wait a few weeks for the engine to arrive and I was given a new S class 350 while I waited. When the engine arrived my OPC had it fitted and ready for collection in just a few days. It is left up to the customer to inform DVLA and no engine replacement certificate is issued as was with engine 2.
Engine 2 had done 4k miles when one day it just went into limp mode at about 8k rpm and the "reduced performance but OK to drive on" light came on. I turned it on and off and it was fine for half an hour but then back into limp mode.
I'm only 250 miles in on engine 3 but it does feel different, in a good way.
I had to wait a few weeks for the engine to arrive and I was given a new S class 350 while I waited. When the engine arrived my OPC had it fitted and ready for collection in just a few days. It is left up to the customer to inform DVLA and no engine replacement certificate is issued as was with engine 2.
Engine 2 had done 4k miles when one day it just went into limp mode at about 8k rpm and the "reduced performance but OK to drive on" light came on. I turned it on and off and it was fine for half an hour but then back into limp mode.
I'm only 250 miles in on engine 3 but it does feel different, in a good way.
Further info,,,
I opted to change the oil and filter at the local OPC on engine 2 at 1250 miles.
It was always warmed up and down properly.
It did use oil and did smoke on start up 3 times out of 20.
Probably added 3 litres of Mobil 1 post oil change.
Circa 400 of the 4000 miles were on track.
I opted to change the oil and filter at the local OPC on engine 2 at 1250 miles.
It was always warmed up and down properly.
It did use oil and did smoke on start up 3 times out of 20.
Probably added 3 litres of Mobil 1 post oil change.
Circa 400 of the 4000 miles were on track.
Edited by 5517 on Sunday 19th July 00:01
arcticGT said:
I'm sure Porsche will get them right eventually. It'll be interesting to see how well the GT4 stands up to hard use.
detuned 991 C2S angine from 400 to 385, there should not be any issues. The power kit GTS version has 430ps.& yes no doubt they will fix it - lower revs?
5517 - Thank you for posting this information and thank you for the updates 
This is vital information and the more posters that follow your lead the better!
I don't buy into Porsche's claims that only 12 cars have been affected as that does not (statistically) make sense with the RSR Nurburg cars being 4 of the ones replaced!
This is vital information and the more posters that follow your lead the better!
I don't buy into Porsche's claims that only 12 cars have been affected as that does not (statistically) make sense with the RSR Nurburg cars being 4 of the ones replaced!
V8KSN said:
I don't buy into Porsche's claims that only 12 cars have been affected as that does not (statistically) make sense with the RSR Nurburg cars being 4 of the ones replaced!
I agree, more disclosures will come out in due course. Real pity.http://rennlist.com/forums/991-gt3/883672-some-gt3...
V8KSN said:
5517 - Thank you for posting this information and thank you for the updates
This is vital information and the more posters that follow your lead the better!
I don't buy into Porsche's claims that only 12 cars have been affected as that does not (statistically) make sense with the RSR Nurburg cars being 4 of the ones replaced!
Presumably Porsche believe (or are claiming) that the issue affects a particular build 'week' which might explain if the Nurburgring cars were all produced together - does anyone know whether this is the case?This is vital information and the more posters that follow your lead the better!
I don't buy into Porsche's claims that only 12 cars have been affected as that does not (statistically) make sense with the RSR Nurburg cars being 4 of the ones replaced!
Otherwise it is very worrying.
Patent said:
IMI A said:
wouldn't want one of these when they're out of warranty great car or not
If Porsche release a 991.2 GT3 with revisd engine and manual gear box (didn't the great aporacle say this would never happen?) one can see the current iteration becoming unloved very quickly...IMI A said:
yep and as per 997.1 and 996 Porsche will be unhelpful to people out of warranty. Not an issue today but in a few years.....It took a class action for them to admit there was a problem with 996 and 997 in the USA and over here they were in denial.
With the demise of the Mezger engine you would have thought the one thing Porsche had to get right would be the replacement.Patent said:
IMI A said:
yep and as per 997.1 and 996 Porsche will be unhelpful to people out of warranty. Not an issue today but in a few years.....It took a class action for them to admit there was a problem with 996 and 997 in the USA and over here they were in denial.
With the demise of the Mezger engine you would have thought the one thing Porsche had to get right would be the replacement.sidicks said:
Presumably Porsche believe (or are claiming) that the issue affects a particular build 'week' which might explain if the Nurburgring cars were all produced together - does anyone know whether this is the case?
Otherwise it is very worrying.
Sidicks , I think one of the RL posters with an issue : their engine replacement was one of the very last cars (I may have this wrong as I was speed reading the whole thing very quickly) which is slightly odd as you'd think this may have happened when they were rushing out the 700 odd units. Just thought you'd want to know as it would have made me feel better . I have to say , if this was a major issue there would be tons of cases by now ; as although lots of cars are garage queens - lots are not and have seen some proper use / mileage - my advice is relax and enjoy Otherwise it is very worrying.
Off at a slight tangent - it is amazing the different approach of the "posters" on PH and RL - and this doesn't apply to everyone on here by a long way , but it struck me immediately how calm , technical and composed the RL thread was - really not trying to cause offence on PH , I am just saying it struck me as different
Edited by RSVP911 on Sunday 19th July 16:35
sidicks said:
Presumably Porsche believe (or are claiming) that the issue affects a particular build 'week' which might explain if the Nurburgring cars were all produced together - does anyone know whether this is the case?
Otherwise it is very worrying.
It's possible but seems pretty unlikely. The common denominator seems to be track time and reasonable mileage. There are a few cases over on Rennlist that have these factors. No sign of any trouble from any low mileage garage queens it seems. Anyhow all covered by warranty for now. Will be interesting to see how it develops. Otherwise it is very worrying.
IMI A said:
Patent said:
IMI A said:
yep and as per 997.1 and 996 Porsche will be unhelpful to people out of warranty. Not an issue today but in a few years.....It took a class action for them to admit there was a problem with 996 and 997 in the USA and over here they were in denial.
With the demise of the Mezger engine you would have thought the one thing Porsche had to get right would be the replacement.Out of interest - 991GT3 - v - Carrera S engine
A lot of similarity all round - fundamentally it is the same engine now but:
Induction is different
Cams are different
Pistons are different
Lube system is modified to have more baffles and scavenge ability
Block bore is modified to suit displacement
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