MarkG123

I believe it has to do with the emission system that does not perform well from a cold start. Driving the car warms up the catalyst faster.

997v2cabrio

Could I cause damage to the emission system by idling?

Robocop305

Maybe, idling the car when cold builds carbon deposits?

utkinpol

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.

jwfrazier

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.

z3mcoupe

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?

cool flash

I currently have 88.000 km (approx. 55.000 miles) on the clock of my 2010 997.2 3.6L (non-S). Cars runs fine, very little oil consumption and tail pipes are clean.

Regards,
CF

wwilliams88

Not as high as yours, but at 67000 miles with no issues. Still plenty of life in that car.

Porsche605

I have 73,000 miles on my 997.2. No issues. Burns 1/4 of a quart every 1,500 miles.

slicky rick

2 issues i think that might be there on the 997.2 ; carbon buildup and cylinder scoring. No documented evidence any exist....good for 997.2 owners

usmm1234

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!

Robocop305

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!

slicky rick

These are hunches as they are common problems with dfi engines and flat 6's but like i said no documented evidence these happen on a 997.2.

mikeborden

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

Fahrer

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.