997.2 Engine Reliability
03-27-2015, 10:15 PM
#331
Rennlist Member
No, not quite!
Back in 2009 when the 997.2 was first introduced Porsche stated:
And, they keep stating the exactly same thing about the 981/991:
The question is that from MY11 onwards all the 997.2 S PDK came with a 3rd central radiator from factory independently of the country or climate... WHY?
BTW, anyone knows how the power steering fluid is cooled on the 997.2 ?
03-27-2015, 11:39 PM
#332
Rennlist Member
The freon from the air conditioning system gets sent to the intake manifold via the CO2 converter. If the car has a third radiator, the freon bypasses the converter and goes directly to the steering rack to cool the steering fluid. Does your car have pdk or is it a manual? That changes things.
03-28-2015, 04:28 AM
#333
Rennlist Member
03-28-2015, 08:18 AM
#334
Racer
Join Date: May 2010
Posts: 287
Likes: 0
Received 0 Likes
on
0 Posts
Ummm... the 991 must represent a BIG step forward then, because I can't see none of those potential issues you're talking about in here:
Wait a minute... I remember now, contrary to what happens in the 997.2 the power steering of the 991 doesn't need any cooling whatsoever as it is electrically assisted and not hydraulically.
One less issue to be worried about, at least, on heavy duty applications.
Wait a minute... I remember now, contrary to what happens in the 997.2 the power steering of the 991 doesn't need any cooling whatsoever as it is electrically assisted and not hydraulically.
One less issue to be worried about, at least, on heavy duty applications.
03-28-2015, 03:35 PM
#335
Nordschleife Master
Another indication of how technically clueless you are, regarding heat generating sources and other issues. Go out and drive a Camry!
03-28-2015, 04:33 PM
#336
Rennlist Member
Lol. Watching CaymanPower post is kind of like watching the Kardashians. You know it's bad and you can't understand why they're so ________ (fill in the blank), but you watch it because its like an accident that you can't look away from.
03-29-2015, 08:00 AM
#337
Racer
Join Date: May 2010
Posts: 287
Likes: 0
Received 0 Likes
on
0 Posts
03-29-2015, 11:12 AM
#338
RL Community Team
Rennlist Member
Rennlist Member
Then it dawned on me: I think he is a teenager. No adult would hang around a place where they are not liked/appreciated/insulted. It is like the crank-call syndrome.
Peace
Bruce in Philly
03-29-2015, 06:03 PM
#340
Or simply burned once, insecure to jump into the pond again, and really only comfortable with a Prius at the end of the day. Cayman, anything that works will eventually break. If you need a Porsche then buy a 991 with the latest and greatest of all the things you have pointed out the 997 lacks (must lack since the 991 got them). Just putting in my 2 cents.
03-29-2015, 07:41 PM
#341
Racer
Join Date: May 2010
Posts: 287
Likes: 0
Received 0 Likes
on
0 Posts
Or simply burned once, insecure to jump into the pond again, and really only comfortable with a Prius at the end of the day. Cayman, anything that works will eventually break. If you need a Porsche then buy a 991 with the latest and greatest of all the things you have pointed out the 997 lacks (must lack since the 991 got them). Just putting in my 2 cents.
The 991's engine is arguably the best water cooled Porsche boxer engine yet, namely as far as reliability goes.
Unfortunately, I don't like the 991's concept as a whole. If I could choose I would rather have a 997.2 with the 991's engine in it.
03-29-2015, 07:51 PM
#342
RL Community Team
Rennlist Member
Rennlist Member
03-29-2015, 09:29 PM
#343
Rennlist Member
Porsches aren't water cooled. They're air-cooled. The coolant is for the tires.
03-30-2015, 01:26 AM
#344
Instructor
Join Date: Feb 2015
Location: UAE
Posts: 178
Likes: 0
Received 0 Likes
on
0 Posts
^^^ that's news to me. I just put some more cooling air in my tyres. Should I be using coolant instead? 
I'm worried my engine will blow now...
I may top up the oil filler with coolant too, just to be sure.
I'm worried my engine will blow now...
I may top up the oil filler with coolant too, just to be sure.
03-30-2015, 07:14 AM
#345
Racer
Join Date: May 2010
Posts: 287
Likes: 0
Received 0 Likes
on
0 Posts
The 991's engine has a much better coolant thermal management system and an uprated DFI system with better injectors, capable of higher fuel injection pressures and much better fuel atomization.
The engine's redline is now at 7800 rpm!
All things considered, the 991's engine is more free revving, has better performance, better gas mileage, lower oil consumption rates and better reliability when compared to the engine of the equivalent 997.2's model.
It's a no brainer, really!
The engine's redline is now at 7800 rpm!
All things considered, the 991's engine is more free revving, has better performance, better gas mileage, lower oil consumption rates and better reliability when compared to the engine of the equivalent 997.2's model.
It's a no brainer, really!