Cayman 718 GPF Failure

[Paul-718gts]

Hi All
Backing up Dave's last post how can my situation make any sense, based on feedback from Porsche after my GPF is now apparently full and needs to be replaced ?

Car was purchased back in March and the presale VAL showed the following compared to the current VAL test after approx 1400 miles with no lights indicating that a regeneration was needed so I can only assume any soot build up was being managed by my driving style or the car.

K211 and K221 soot % reading between ) 0 % and 5.49% on both occasions
K231 Oil/Ash Load % reading 77.65% pre-sale and now 100% after 5 months and 1400 miles..

So in summary in 1400 miles the ash level has increased by 23% - there is no way in 1400 miles the ash level could be increased by burnt soot that has been trapped in so few miles ?

This can only leave wrong or excessive oil being burnt - well the car was fully serviced on purchasing we can only assume Porsche used the correct oil.. they have no way of checking if the incorrect oil was ever used pre my ownership..

This can only point at something allowing more oil through or the sensors not providing the correct readings.. or both ?

The mystery continues

 

[Scrounger]

Thanks for the info Dave and Paul. I seem to recall someone posted that one of the issues was the implementation of the GPF as a knee jerk reaction on the earlier cars without proper testing of the system. I can’t see Porsche throwing something on the car without proper testing however could it be the case?

Is there enough evidence to start a case in court with Porsche or at least send them a notification of intent?

Dan

 

[Motorhead]

I can recall the same Dan, although most likely it was just speculation, and you’d expect a company like Porsche not to release a car without sufficient development work being done and leaving early customers to be guinea pigs, but who knows … especially if the development team were under severe time restraints?

It seems to me that the whole issue depends primarily upon accurate determination of the ash load using data from the differential pressure sensor, and from what Dave is saying, if in most/all [?] cases it appears to be giving erroneous information then the simplest initial course of action would be to replace it and re-run the test before changing the GPF? However, getting Porsche to recognise the problem by looking critically at the obvious anomalies in the data - as highlighted by Dave - seems to be the biggest challenge. They appear to be in denial of the facts and persist in hiding behind the accusation that driving style is the cause of the problem.

Paul, correct me if I’m wrong but my impression is that the car was serviced by the Porsche dealer before your purchase, presumably with the correct low ash oil. In that case your 1,400 miles was driven solely with this oil, and still the ash level increased by 23%. Assuming you weren’t driving continuously like your gran, I agree that’s highly unlikely unless the AOS has failed or there’s a sensor error. Even if the incorrect oil was used at some time prior to your purchase, that’s irrelevant.

Have you challenged your dealer’s service manager to explain fully the suspicious results from the test? If he/she is unable to do this to your satisfaction I would ask with whom you can make contact at Porsche GB with sufficient technical competence to explain the results. If nothing else it would give Dave a shoe-in name for making his case!

The saga continues!

Jeff

 

[glenn duval]

Porsche throwing stuff on the car without proper testing.
Active gearbox mounts been a good example.

 

[Cyclemotor1958]

Hi Guys
If you type in Google.
Porsche is making a model range fit for coming emission standards.
You can read the whole article
Dave

 

[Scrounger]

So in short, they had 3 months to add a GPF!

Dan.

 

[911hillclimber]

This is quite a story and as just said, complex parts on these new models that seem to fail (engine mounts). I have an old 987.2 and had lots of issues. Just poor design and seems minimal testing before production starts.
As to costs:
Someone said labour is 4 hours, so at £100+ (?) about £500 to pay.
The part from Eurocarparts is £2800 + vat and special order, so I presume a Porsche part so about £3200

Thus, how can the £7500 cost quoted much earlier be justified?

Have I missed something (big) out?

 

[Motorhead]

Have a look at David’s post #220 for a detailed cost breakdown Graham, presumably based upon a Porsche dealer’s prices for replacing the GPF. Eyewatering!

Jeff

 

[Scrounger]

If out of warranty I’d be looking at an indie to replace.

Dan

 

[Paul-718gts]

Excellent work David, it would be great if Porsche technical would engage with us to explain what is going on here, this problem is not going away and i believe more and more cars are going to have this issue and Porsche's only answer is to change the GPF at a cost of £7500 with no explanation of the real cause and owners have no assurances that it won 't happen again. I honestly cannot believe an expensive component like this is not covered under the extended warranty, this most definitely is not a wear and tear part.
Appreciate the time and effort you have put into this David, the search for the truth continues.
Regards
Mark

Hi Mark,
Reading back through your original post for the 4th time it’s clear very clear to me that in regards to customer care and process of dealing with this issue I am on exactly the same journey as you had with the same time lines to events.
I still haven’t reached a resolution and I am coming up to 6 weeks from when the fault first occurred.
Would you be up for a call between us ?
Thanks Paul

 

[Wrightrubber]

Hi Paul

Absolutely, no problem. 07790135759.
Regards, Mark

 

[Paul-718gts]

Hi Paul

Absolutely, no problem. 07790135759.
Regards, Mark

Thanks Mark any times to avoid

 

[Wrightrubber]

Thanks Mark any times to avoid

Hi Paul, no, can call anytime.

 

[Wrightrubber]

This was the cost to replace GPF £5673.11 plus £532.21 Labour = £6205.32 plus VAT Total = £7446.38

 

[911hillclimber]

Wonder who the Eurocarparts source of supply is?

What a mess this all is unless you buy / lease new, sell / return within warrantee / conditions and have another or something else.