13 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
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YOUR RESEARCHWhat would you do?
Leading reported evidence
Replace ims
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
Unsuccessful attempts
1
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1
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Performed · outcome unconfirmed · Original poster
The IMS was replaced with an LN bearing professionally.
Leading evidence: 'Replace ims' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'pretty damn good motor' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Replace ims' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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1
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Suspected cause
If it�s got 117k miles - it�s probably a pretty damn good motor.
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13 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261026T122219Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I somewhat successfully rebuilt my original engine last spring. It had suffered a spun rod bearing and ejected thrust washers. I found a good crank and carrier, bought all new bearings and bolts and put it back together. It lasted until fall, when number six cylinder decided to d chunk, taking the piston and rod with it. I'm not 100% certain why it failed.
I have purchased a seemingly well cared for long block from an enthusiast who does not do his own work. It has 117K on it and has great service records. The IMS was replaced with an LN bearing professionally.
So... what would you do? Just install it as is? (My car has 70K miles on it). Or, would you take the crank and carrier with new lower end bearings and the new rod bearings from the trashed motor and put them in the long block? ( I wouldn't sleeve the motor. I'd retain the long block pistons and rings if the cylinders look good.)
I plan on keeping the car, cause dammit it I love it and its tremendous fun to drive and own even if 996 motors are made out of papier-m ch�.
Your thoughts???
Rock the motor as is. It would be nothing for it to go 150k miles which will be many years down the road for you. Just hit the main maintenance items while it is out.
Hmm, I would have maybe looked at the Porsche remanufactured engin option, assuming the core on your old engine would have been accepted by Porsche. But since you already bought another long block, I guess I would just install it and wait for a rebuild down the line. It may never come, an the long block could run to $200k and beyond, but in all liklihood, I may need a rebuild at some point sooner or later.
The PO sent me a comprehensive compression test that was taken right before they dropped the motor. It looked really good. My core was trashed. I will probably do the oil analysis. (The PO got a great deal on a 997 engine from a wreck and his shop installed it and worked out the electrical issues.)
If you have a lot of confidence the the long motor, use as-is, with some choice new bits like seals, gaskets and AOS etc.
Sometimes you get lucky with these motors, you might get another 50-70k miles out of that motor.
If it�s got 117k miles - it�s probably a pretty damn good motor. Let�s try not to treat these cars as if 100k miles for a 15 year old car is �end of life.�
Rock the motor as is and have fun.
Plug & play after making sure the peripherals are sound is what I'd do. If you want to resell in the near future, maybe sell the other motor & buy a new short block.
