tthellott T

Mates, does this concern you in terms of reliability or just me? "plastic" could be a composite material, but durability under high-temp/stress with all kinds of lubricant conditions on a newly developed engine sounds quite a risk to me... or any idea if similar plastic technology has been used on other high performance Porsche/none-Porsche engine sump?

, https://newsroom.porsche.com/en/pres...rformance.html

worf928

991.2s have a ‘plastic’ oil pan. They’re not crumbling left and right. Call back in 15 years.

Dan87951

Not surprised one bit. Porsches cheapness knows no bounds. We all know plastic overtime does not last over repeated heat cycles. Just look at all the past models that have used plastic components on important subsystems and it has been a complete disaster. My guess is that within a year of the warranty expiring this plastic dry sump will break and owners will have to pay the "Porsche Tax" to get it back on the road. Porsches engineers have gotten really good at making their cars last up until the warranty. After that... God help you. Just remember you don't become the most profitable car company (Porsche) in the world by building quality cars.

Todd B

It's all being driven by MPG. They are looking for any place to save weight. I would think somebody in the aftermarket world could CNC a replacement out of aluminum or similar material. It's not just Porsche, my oil pan/drain plug in my F150 are plastic.

groundhog

Its been on the 9A2 engine since inception - never been a problem and that includes on heavily tracked cars

Dan87951

Bwhahahahhhahahahahahahaahhahahahaahahahahahhahahaha!

groundhog

Yep it's a fact - 😀 Owned a 991.2 S, 991.2 S-X51 and 991.2 GTS. Crashed two on track, the plastic base was and is a non-issue. Although my driving clearly was LOL

I think you you just won the red nose and long pointy shoe award!

Dan87951

I love how people make baseless claims and also don't know anything about engineering. Look at Porsche's track record on using plastic and you tell me if it was durable enough. These cars are built to last up until the warranty, after that good luck. You don't become the most profitable car company in the world by making quality cars! That's a fact!

dmk2

Plastics have, and will remain, the weak link in most cars going forward.

Hydrocarbons have a finite half-life. The material science just doesn't hold up over time.

These cars ARE built for profitability, not longevity. Longevity died with the air-cooled cars.

Those of us that have owned one of Porsche's cars for more than a decade can tell you that it is the plastics that fail first. My beloved 2007 Cayman S that I have owned since 2006 has required three AOSs, one door latch, and one window regulator. All were plastic pieces that broke.

I too have wondered if the plastic oil pan on my 991.2 GTS will need a metal replacement. The oil plug itself doesn't give a reassuring feeling.

groundhog

Lol - campaigned one car for two full years with zero problems. When I say campaigned I mean Tarmac rally and track - bent rims, control arms, fenders - never had a problem with the sump. That's a fact it's durable period.

groundhog

.

What sort of driving are you doing that will cause it to fail - are you hitting an apex regularly at 120kmh plus?!!!!

How will a big chunk of plastic fail other than if you wallop it against something solid????? And if for some reason the thick chunk of plastic feels a bit fragile in 15 years buy a replacement. Job done.

This really isn't a big worry 😀

dmk2

Not worried at all. Kindly see my above explanation.

Dan87951

Porsche is using plastic for one reason and one reason only. Cost! Plastic is super f'ing cheap and the more plastic they use the more it increases their bottom line and gives upper management fat bonuses.

The guy claiming to just replace it "when it feels a big fragile" is laughable at best. By the time you figure out the pump is broken the collateral damage that it caused will require you to buy a new engine. If you are ok with Porsche continuing to cheaplify their cars to the point of planned obsoletion then you are Porsche's type of customer.

dmk2

Agreed.

spdracerut

Well, used for two reasons: cost and mass reduction. All the OEMs transitioned to plastic intake manifolds a decade ago. Audi started using plastic engine subframes a few years ago. Ford has plastic oil pans on their F150s. I would agree that the plastic won't hold up as well over a long period of time, but long enough for the average consumer. So, ~10 years, give or take depending on operating conditions. As a frame of reference, coolant radiators with plastic headers. They tend to crack after ~10-15 years, 200k miles, give or take.