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That is a common problem on the 991.1 Gt3rs ,
I had a failure on the track under warranty it was fixed but they would not extend to 10 year warranty like the GT3.
I wonder if PAG replaced more durable valve spring for your warranty work?
May I ask ? Did PAG tell you what was possible causes for valve spring failure and how to avoid it in the future? Thx!
Not to go all off topic, but what's the plan when our gt3 .1 engines are out of warranty? If there is a failure, is there a fix? 40k repair bill kills my " I want to keep this car forever" vibe. I have 22k miles 2015 original engine.
I too wonder this as I can't afford a $30-$40K repair bill out of warranty. This makes me lean towards enjoying my 2014 (currently has 13k miles) for another year, then selling it so the next owner has 2 more years left on the warranty. Wouldn't be a bad time to pick up a 718 Boxster Spyder and not have the little fear in the back of my head.
Not to go all off topic, but what's the plan when our gt3 .1 engines are out of warranty? If there is a failure, is there a fix? 40k repair bill kills my " I want to keep this car forever" vibe. I have 22k miles 2015 original engine.
Dundon nearly had a fix released to market and then the warranty was announced, so it was temporarily shelved. Would be awesome to refresh a 10yr motor and get some added displacement in the process.
There are way too many these cars in existence, the market will drive a solution one way or another. Try not to worry about it.
Absolute worst case scenario is paying full price and having a fresh heart (a corrected heart) in a 10+ year old car. I’m not completely opposed to that. Wouldn’t be shocked if PAG goodwills a portion if you’re impacted by the FF issue.
not really any legal footing here. But I do think they should stand behind their product. Just like anyone else out there. Local dealership isn't having any part of it. I will put together an email to Porsche and see what happens. I don't expect anything and moving forward with the rebuild.
We ended up pulling both heads. Just to check all the valves. Here's the update.
We are doing a complete Valve job, new springs,( old springs are weak ) seals and keepers. Head gaskets, all seals, spark plugs, exhaust gaskets ,carbon cleaning of intake , heads and pistons.
Valve springs are all over the place in coil bind pressures. New one was 20 psi more at coil bind than the old ones
The low seat pressures will cause the valves to bounce at high rpms. Not good and will break valves
The springs are timed out.
there is still NO signs of why this would have happened. So we are scratching our heads.
porsche USA responded to my email and only said take it to the local dealer. I'm not going to post the full response here until
after I talk to them. But they are not taking responsibility. Which is understandable being out of warranty.
We ended up pulling both heads. Just to check all the valves. Here's the update.
We are doing a complete Valve job, new springs,( old springs are weak ) seals and keepers. Head gaskets, all seals, spark plugs, exhaust gaskets ,carbon cleaning of intake , heads and pistons.
Valve springs are all over the place in coil bind pressures. New one was 20 psi more at coil bind than the old ones
The low seat pressures will cause the valves to bounce at high rpms. Not good and will break valves
The springs are timed out.
there is still NO signs of why this would have happened. So we are scratching our heads.
porsche USA responded to my email and only said take it to the local dealer. I'm not going to post the full response here until
after I talk to them. But they are not taking responsibility. Which is understandable being out of warranty.
Why u are at it are you going to split the case and replace rod bearings
We ended up pulling both heads. Just to check all the valves. Here's the update.
We are doing a complete Valve job, new springs,( old springs are weak ) seals and keepers. Head gaskets, all seals, spark plugs, exhaust gaskets ,carbon cleaning of intake , heads and pistons.
Valve springs are all over the place in coil bind pressures. New one was 20 psi more at coil bind than the old ones
The low seat pressures will cause the valves to bounce at high rpms. Not good and will break valves
The springs are timed out.
there is still NO signs of why this would have happened. So we are scratching our heads.
porsche USA responded to my email and only said take it to the local dealer. I'm not going to post the full response here until
after I talk to them. But they are not taking responsibility. Which is understandable being out of warranty.
Crazy, sorry you are having to deal with this, especially not having more answers. Will be interested to hear more.
Do you have the spec re pressure at the seat? I can't imagine its super high given the cam profile light valves and desire to save the rocker would guess maybe 100#? usually when I find broken springs its a bad batch or some weird harmonic/resonance from a changed profile or other hard parts.
I always wondered if part of the issue with the 2014 engine was too high of a spring constant which could put too much force on the finger follower and cam. Porsche seemed to blame it on metal inclusions which would be a supplier issue not an engine design problem. Of course too weak of a spring would be bad at 9000rpm so they are trying to balance valve float against forces on the cam. I was curious if they reduced the spring constant for the 2016/RS engines. I would like to see the 2014 valve springs compared to the 2016's however all the 2014's are gone. It's interesting that you say the new springs have more resistance than your existing ones though.
Porsche may have put in some goodwill towards the engine repair at a dealership where they can see the engine and parts (perhaps send parts back to Germany for analysis) but I don't see that happening with an independent repair shop.
08-14-2020 | 02:39 AM
