Cayman 718 GPF Failure

[Paul-718gts]

Hi Dave,
Hopefully the article planned for the March addition of the Porsche Post will be a catalyst to jump start the engagement needed for collaborative working between the Brand , dealerships and owners to concluded both a root course and fix to this issue.

And we can all then get on with enjoying our cars and not worrying about them.

 

[Martin991Gen2GTS]

Morning all,

FIRSTLY, my enormous thanks to Dave for his tireless efforts on this subject, his sage advice greatly appreciated.

I have a 991.2 GTS and have been presented with the same excuses by Porsche. Your GPF is full and it needs to be replaced (after 12,000 miles over 6 years) it's not been driven correctly etc etc. The issue is little different from the one 718 owners are having, the excuses from Porsche precisely the same as are the enormity of the bills that Porsche are expecting owners to pay. Having taken Dave's advice to obtain specific information regarding the GPF, the service dept advised that they need to take advice from their legal dept as to whether they can give out specific info from the VAL, which I'm sure we can all agree, is total nonsense.

So, for what it's worth, if you've got a 991.2 with GPF, you're not alone either...

Martin

 

[Paul-718gts]

Morning all,

FIRSTLY, my enormous thanks to Dave for his tireless efforts on this subject, his sage advice greatly appreciated.

I have a 991.2 GTS and have been presented with the same excuses by Porsche. Your GPF is full and it needs to be replaced (after 12,000 miles over 6 years) it's not been driven correctly etc etc. The issue is little different from the one 718 owners are having, the excuses from Porsche precisely the same as are the enormity of the bills that Porsche are expecting owners to pay. Having taken Dave's advice to obtain specific information regarding the GPF, the service dept advised that they need to take advice from their legal dept as to whether they can give out specific info from the VAL, which I'm sure we can all agree, is total nonsense.

So, for what it's worth, if you've got a 991.2 with GPF, you're not alone either...

Martin

Shocking

 

[Cyclemotor1958]

Hi Guys & Girls

Without prejudice

Thanks Martin for posting your 991.2, with a GPF fault, the dealer should give you the GPF information showing the fault in detail, they could show you the information on the diagnostic PWIS tester, and let you take a photograph.

Afterall why wouldn't they.

It's funny since we found the incorrect Emission data page 42, on our 718 GPF cars, Porsche have had to reverse their original decision to charge our owners and cover the cost themselves.

We even have clarification from one of our faulty cars from Porsche Reading that the fault code P242F was indeed a manufacturing defect.

We have struggled to get any dealer to check the AOS on any of our faulty cars, generally they are not allowed to use a manometer.

The AOS is a vital EMISSION device on these cars, yet it is not checked on service, and it's not checked even when the P242F oil ash load exceeded light comes on.

We know that 90% of ASH is burnt engine oil.

So why is the AOS not checked, and why will Porsche not give us the acceptable vacuum readings we all need, to confirm the part is serviceable.

Funny that several of our cars with new GPF filters fitted last year are now having extensive checks on the engine to establish the presence of engine oil in the combustion cylinders.

Should this not have been done before they condemned the GPF.

So when a car is returned after the GPF has been replaced, the dealers and Porsche still believe that the unusually high oil ash % is real.

It's impossible to accumulate this amount of oil ash level over these very low mileages covered.

I keep going on about a simple exhaust back pressure check, but nobody is listening.

Enclose below is photo of an exhaust back pressure gauge, and a manometer to check the AOS.

Kind Regards

Dave

 

[Cyclemotor1958]

Hi, its me again,
With have hit 35K views on this subject
Dave

 

[Cyclemotor1958]

Hi Guys&Girls

Without prejudice

Our dealers are now being asked to look for evidence of oil contamination on vehicles that have had new GPF filters fitted last year.

It's quite obvious now that the GPF filters were not the cause of this issue, the replacement filters are blocking up faster than the original one.

Still no back pressure checks being carried out, and no acknowledgement of the none existent differential pressure that would confirm a blocked GPF filter.

I feel we have come full circle, since my first post on page 5 of our Porsche Club Forum.

One way of allowing extra engine oil to get into the cylinders and exhaust is to not check the AOS vacuum readings.

Enclose some more information for you to read.

Regards
Dave

Signs Associated With Porsche Air-Oil Separator Failure

The air-oil separator failure in Porsche can lead to excessive oil consumption which can be hefty on the wallet. So, know the signs to fix the issue timely.

kruselucas.com

 

[911hillclimber]

Good article from the USA above imho.
I have had acute AOS issues on my old skool 987.2 but on both component changes I've cut open the old AOS to find nothing ripped or failed, but lots of oil in the tubes to the intake which gives the HUGE plume of white smoke every now and then on cold start.

This has all but been eliminated by reducing the oil level in the engine, obviously as indicated on the dash board (bring back dipsticks).

My engine now runs a hot oil level at tick-over mid way between Max and Min. This has fixed the issue though I do every 3 months or so remove the AOS pipe and wash through with solvents, some oil, but very little. I have run this way for 4 years, set to this level at an oil change and never needs oil top-up (now 85K miles old).

The graduations on the dash are the same as the dipstick Max/Min markings on an ordinary dipstick.

My 1973 911 runs the very same level position used on the road and hillclimbing with no ill effects.

Just a thought in this perplexing scenario.
Looking forward to March Post and the reactions after.

 

[Cyclemotor1958]

Hi 911Hillclimber

Brilliant post, you are right the oil levels are wrong, nothing wrong with dip sticks.

When you look at AOS vacuum testing by using a manometer attached to the oil cap, with engine running, you get an accurate vacuum readings.

Enclose information used when I worked at my local Porsche independent Garage.

This information was supplied to me personally from a brilliant Porsche contact in America, 8 years ago.

Our cars are running above 30 H20 (inches of water), which is a lot, and on a recent 2018 718, that had white smoke on start up, the vacuum readings put the tester in error mode.
It went off scale, it's scale limit was 55 H20.

We are trying to get Porsche to give us the AOS testing vacuum data on these cars, but no contact as yet.

Enclose photos of my information mentioned above.

Regards
Dave