captainbaker

Well that escalated quickly hahahah.

My best friend is the senior tech at a large Pcar dealer here in Socal. I had many discussions with him pre purchase. From his experience, he has had a handful of 05's with IMS failures over the years. 06 and newer.....'not worth mentioning'.

He said to expect the water pump to fail and possibly one of the cables in the starter loop. Water pump was replaced by the PO and I just did the starter.

996AE

Thus my humor

Kind a like a oil thread

997.1 2006+ IMS is a non issue

If you think it is buy a honda

911-997

lets not spread the rumors over here if there is no proof. I have asked all P-car shops in my area and they never seen .2 with bore scored cylinders but they have seen few in .1

HODY905

Doug H, thanks for your input and I will be guided by your comments. To all others thanks for chiming in.
Let's end this thread here. I have received the information I was seeking.

Doug H

Really, please show me where he said 4 dozen failures in 997.2s DUE to bore scoring on here. Link please. I am curious about this.

I have seen him throw around various statements about working on .2s, but he never really identifies why he is working them other than to say about 1/3 of what goes through the shop is ELECTIVE or upgrade work on healthy engines.

He lost me when he professed to know why they are bore scoring, declare it preventable, but then refuse to explain or offer as a potential remedial measure. Perhaps too busy fixing 996s (apparently backed up for 13 months) to discuss his ideas or address/implement how to prevent the failure before catastrophic failure occurs . . .


Again, he may build a great motor, which I have no knowledge of one way or the other and I never heard of him back when I was having others all over the country build many 911 track cars, high performance motors and race cars from late 80s until I stopped racing around 06/07 and my father who raced 911s for many years before that . . ., but his logical and analytical skills seem to be lacking. He, however, certainly showed up at the right place at the right time offering a necessary service for an engine that has turned out to be a disaster IMO.

SoCal C2S

You lit this fire....others will now burn it to the ground (or the forum equivalent). Soon there will be oil type that is best, and end up with the bantering which is better, the 997.1 or the .2 that will also include someone trying to squeeze in the 991 and also the 993.

You see we all love the 911 but every once in a while we forget to actually go out and drive the car! Don't worry, the discussion will end soon...

just to be resurrected in about 3 years with a new 911 owner to be asking the same thing.

But I do love this forum and the many man-years of experience!

Hella-Buggin'

+1 Pretty much!

braymond52

A few years back I bought my '05 997.1 with 20k miles on it. At that time I went ahead and had the IMS bearing replaced with an aftermarket unit.

As you can see from the comments, there's a wide spectrum of opinions on the IMS bearing issue. So, who's opinion do you believe? I made the decision to get it replaced and not carry around the nagging worry of what 'might' happen. Now, I just drive the Hell out of the car with no worries.

rickdogg82

https://rennlist.com/forums/997-foru...lp-please.html

Post #9

911-997

ha!
So I can become a vendor and claims whatever I want here and you would believe that?

I suggest you do more research that just reading that post. Go to local shops and ask about it.

rickdogg82

Calm down. It's just a link.

Doug H

He is not real specific or clear in saying all 4 dozen were failures or even failure due to scoring.

He also makes comments in that thread that seem a bit inconsistent with what he said in the below about which is better and in 2010 he had one DFI which was elective, then only 5 - 6 a year for the early years would seem to run up to 2012 or 2013, but he is clear that 1/3 of all DFIs he worked on are elective and I am sure we have failures related to money shifts and various mechanisms other than bore scoring.

Anyway, here is the quote, but he does make it clear his business is "booming" from the M96/97 work. I would like to know what the preventative measure he has to keep the scoring from happening as I would be inclined to purchase a 08 X51 aero kit that I want if I could implement a measure to prevent bore scoring.


https://rennlist.com/forums/997-foru...overage-4.html

"I agree that these engines are much better than the M96. Instead of 29 documented modes of failure (24 of which I had identified before the engines were at their 6th year in service) we only have 7 documented modes of failure for the 9a1.

We still have a constant flow of 9a1 engines coming through Flat 6 from this era, but about 1/3 of those are elective builds, where owners want a hand built engine thats application specific, and they have not had a failure. I'd say that within the next year the 9a1 based builds will supersede our M96/ M97 based built in terms of volume through the facility.

In the early days of our 9a1 program we only built 5-6 engines per year, and way back in 2010 we only found one guy crazy enough to send us his 997 with 11 miles on the odometer to have the engine pulled apart and built into my 4.2.... We like crazy people."

raspritz

I have never heard of an '07 or later 997.1 with an IMS failure. There was a big thread here about this, back around 2012 or 2013, and nobody could document any at that time. While I'm sure it happens, the rate doesn't seem to be higher than for any other car.

lowpue

I have been reading this thread with much interest because I am putting a 997.1S engine in my 996. I currently also have a 09 997 4S that I bought because the IMS issue was designed out so I was a little nervous about the .1 engine. My Teck has convinced me it is a bigger bearing and that he has only seen one failure in his career on 997.1 big bearing. he also said the big bearing is quite costly to replace because engine has to come apart. He will take out the seal though to ensure oil gets in the bearing. Hope it works :-)

sandwedge

Here. One -06 and two -07's. Posts 110, 171 and 217 respectively:

https://rennlist.com/forums/997-foru...ml#post8924078

https://rennlist.com/forums/997-foru...ml#post9067592

https://rennlist.com/forums/997-foru...ml#post9677220