Just wondering if there is any high mileage 997's out there, how many miles
and what major problems you have had. Mine has 59700 still running like new.
Only problems were HVAC peeling and clutch switch malfunction. Hoping to get
150,000 to 200,000 miles out of the engine. Am I dreaming?

 

Hope not! I have the same dream as you.

 

Very interested in this as well.
Thanks for sharing your experience

 

If not abused a 997 engine should be good for 200k miles.

 

Taking into account what Iīve seen ever since 1997 when the M96 came out, yes, I believe your are dreaming.
The 996 used to blow their engines like hot cakes, the 997 bloc although the same, seems to last a bit longer, anyway, they still blow in a rate that is totally unacceptable in my view.

 

I'm very interested in what you are referring to. Can you refer me to the issues aside from the IMS problem prevalent in the early 2005's. I've not heard of any others except for cars that put on a supercharger but probably had a bad tune.

 

Thanks, but by abused do you mean over revs or driven hard?

 

I mean abused. Missed shifts, driven hard cold, driven hard short distances without proper temp cycling. Have no doubt that many abuse their cars, as I describe, on a daily basis.

Jseven is correct that some M96/M97 engines have self destroyed but they are a minority. The issues are known and correctable (at a cost). 997s mid 06 and newer have more robust RMS and IMF components. There are many cars with over 100k miles and running strong.

Should an engine need repairs it will cost a lot less than trading for a new car anyway.

 

To add to what I said... The majority of engine non-OEM mods reduce engine longevity, includind ECU tweaks. I take cover now as many on this forum will now start targeting me.

 

Thanks adias, my mind is at rest, do you think IPD plenum is a mod that
affects engine durability? It just changes airflow, seems harmless to me.

 

I dont think no one should say anything, i think it is kind of true to a certain extent.....

 

I do not know.

 

I donīt want to scare you, but these M96 engines are not trust worthy. Soot was another issue on 05 engines.
http://forums.rennlist.com/rennforum...w-engines.html

There are people who are running their cars without even knowing they had a replacement engine (second hand cars)
http://forums.rennlist.com/rennforums/997-forum/414033-replacement-engine.html

You can get any kind of problems with this engine... loose bolt and you get a new engine too
http://forums.rennlist.com/rennforum...ew-engine.html

One minute search on any online for sale cars and bang, there you go, many 997 with new engine
http://suchen.mobile.de/fahrzeuge/sh...n&pageNumber=1

 

I agree with you 100% and it's often not discussed on this forum. People need to be aware that getting more (max) out of an engine can shorten it's life or at least incur heavy maintenance costs.

As for the plenum question, it's debatable. Some argue that it's gains if any actually come from smoothing out air turbulence causing some cylinders to run leaner than other cylinders. If this is true (and I have no proof that it is) then that would certainly affect engine wear.

Personally, I like mods that are OE. That is why the only mods I consider doing are X51. Doesn't void warranty and I like that it's all OE. What's good enough for Porsche is good enough for me.

 

Thanks for all the info, I'll cross my fingers!