997.2 Engine Reliability
Pro
Joined: Jul 2009
Posts: 609
Likes: 61
From: Charlotte /Wilmington NC
Does any know why Porsche does not want their engines idling? The owners manual says "When starting the engine, be ready to drive
immediately.
Drive vehicle at moderate speeds and avoid
engine speeds above 4,200 rpm during the
first 5 minutes.
Do not let the engine idle to warm up."
immediately.
Drive vehicle at moderate speeds and avoid
engine speeds above 4,200 rpm during the
first 5 minutes.
Do not let the engine idle to warm up."
Rennlist Member
Joined: Jul 2009
Posts: 6,087
Likes: 51
From: MA
with m96/m97 you need to let it idle at least 20 sec or so for chain tensioner to fill up with oil, especialy if you get chain rattle at startup. new dfi engines have a different design but I would think they still got same chain inside, so may be same issue applies. as of complete warmup - no modern car needs that anymore.
Track Day
Joined: Oct 2006
Posts: 15
Likes: 7
964
Sorry to revive an old post. I'm really glad to hear of few problems with the DI engines, as I am in the market.
As for the 964, they had a hell of a lot better engine than what was put in the non-turbo boxster's and 911's from 1999-2008.
As for the 964, they had a hell of a lot better engine than what was put in the non-turbo boxster's and 911's from 1999-2008.
Rennlist Member
Joined: Mar 2014
Posts: 832
Likes: 183
From: Long Beach, CA
My 2009 3.6 DI engine just turned 86k miles and when its cold it takes about a 1/2 second longer to start compared to when its warm . Probably more the nature of starting a cold engine, but it never misses a beat and starts every time.
I've not performed a borascope on it, so I've not idea whether it has carbon build up or not - I plan to get it done in a few months just for peace of mind. I do know someone who works in the Porsche factory in Germany who assured me after he found out it was the 997.2 the engines will 'run forever' but he failed to mention how many rebuilds it would need in that time
Any other high mileage .2 motors out there?
I've not performed a borascope on it, so I've not idea whether it has carbon build up or not - I plan to get it done in a few months just for peace of mind. I do know someone who works in the Porsche factory in Germany who assured me after he found out it was the 997.2 the engines will 'run forever' but he failed to mention how many rebuilds it would need in that time
Any other high mileage .2 motors out there?
Racer
Joined: Sep 2013
Posts: 264
Likes: 7
From: Stuttgart, Germany
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Instructor
Joined: May 2013
Posts: 125
Likes: 4
From: Coastal SC
I've owned my 964 for 16 years. It has 37,000 miles on it. All of which my foot was hard in it. I go from 0 to 7 mph above the speed limit as fast as I can, every time I drive the car. It drips oil but uses none. In 16 years the only repair other then a couple relays was an AC compressor. That's it. Bullet Proof!
Rennlist Member
Joined: May 2013
Posts: 2,224
Likes: 544
From: Miami
Where can I find reported issues with the 997.2 to support the above statement? I haven't heard anything negative regarding the 997.2 motor. Mine has 35k miles and it has being perfect! Knock on wood!
Instructor
Joined: Nov 2013
Posts: 168
Likes: 0
From: Memphis TN
I haven't read anything about carbon buildup on the .2/dfi engines. Bore scoring, yes.
There's a thread on the 996 part of this board where Jake Raby posted a pic of a DFI engine that had less than 12,000 miles on it with scored bores. And the only way he and the owner knew about it was when they tore down the engine to make it bigger. They did note a lower than expected number on the dyno than normal for that engine, but it didn't have any other symptoms.
There have been a couple of posts on the 911uk board of .2 engines with scored bores. Not common, but you can't rule them out either.
So, .2 engines aren't immune as far as I'm concerned. Doesn't seem to be as prevalent though.
Mike
There's a thread on the 996 part of this board where Jake Raby posted a pic of a DFI engine that had less than 12,000 miles on it with scored bores. And the only way he and the owner knew about it was when they tore down the engine to make it bigger. They did note a lower than expected number on the dyno than normal for that engine, but it didn't have any other symptoms.
There have been a couple of posts on the 911uk board of .2 engines with scored bores. Not common, but you can't rule them out either.
So, .2 engines aren't immune as far as I'm concerned. Doesn't seem to be as prevalent though.
Mike
Three Wheelin'
Joined: Jul 2007
Posts: 1,649
Likes: 96
From: NJ
I would be more concerned with the life of the cam chains. My understanding is that the use of an IMS was to reduce the strain and wear on the cam chains. Apparently stronger chains are available now but time will tell with these longer chains.
DFI is relatively new for Porsche. VW/Audi has had some issues with carbon build up and now BMW seems to have he same issue. The solution seems to be two sets of injectors ( both port and direct) which is being introduce by VW/Audi and Toyota.
DFI is relatively new for Porsche. VW/Audi has had some issues with carbon build up and now BMW seems to have he same issue. The solution seems to be two sets of injectors ( both port and direct) which is being introduce by VW/Audi and Toyota.