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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHIMS Bearing Replacement - Should I rebuild motor?
Leading reported evidence
Install inside of it
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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0
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1
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Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed
The wear marks inside the IMS and the shaving around the outer race let me think that the bearing outer race has turned within the IMS instead of being press fitted inside of it.
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Suggestion · Original poster
The bearing is completely toast, and with the amount of metal shavings that came off it, I�m wondering if I�m looking at a full engine rebuild or if cleaning all the shavings would be sufficient to not have to worry about it.
Leading evidence: 'Install inside of it' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean shavings would be sufficient' (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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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Performed · outcome unconfirmed
I'll bet the OP wishes he or the previous owner had replaced the IMSB earlier in it's life...
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Suggestion · Original poster
The bearing is completely toast, and with the amount of metal shavings that came off it, I�m wondering if I�m looking at a full engine rebuild or if cleaning all the shavings would be sufficient to not have to worry about it.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
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Suggestion
It needs a full tear down to clean out all the metal out of the oil gallerys and to inspect the bearings to determine what all is needed.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Suggestion
The Porsche Engineers original recommended oil filter change was every other oil change or every 2 Years so 24k to 30k miles on 996/997 m96/7 engines ( they extended the service interval around 2005 ) with OEM cartridge filter so i wouldn't worry about a clogged filter unless something is going wrong with the engine....
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Clean shavings would be sufficient
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
The bearing is completely toast, and with the amount of metal shavings that came off it, I�m wondering if I�m looking at a full engine rebuild or if cleaning all the shavings would be sufficient to not have to worry about it.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
The wear marks inside the IMS and the shaving around the outer race let me think that the bearing outer race has turned within the IMS instead of being press fitted inside of it.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
The Porsche Engineers original recommended oil filter change was every other oil change or every 2 Years so 24k to 30k miles on 996/997 m96/7 engines ( they extended the service interval around 2005 ) with OEM cartridge filter so i wouldn't worry about a clogged filter unless something is going wrong with the engine....
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
16 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T201111Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hey everyone,
I�m in the middle of swapping out my IMS bearing and could use some opinions on what I�m seeing.
The bearing is completely toast, and with the amount of metal shavings that came off it, I�m wondering if I�m looking at a full engine rebuild or if cleaning all the shavings would be sufficient to not have to worry about it. Dropping some pictures below. Has anyone dealt with something like this before? Any input would be really appreciated!
Well, since no one has replied and its been a few days now, my 2�...
Could go on a diatribe about your pics and your question, but really no need for me to do that. A lot more qualified m96 experts already have published exactly what you ask.If you search here for it you'll find tons of info on your exact situation.
But no need to really look any farther, bottom line has already been posted by the best of us.
LN & Jake FSI, have a pre imsb inspection, from your pics, you failed instantly. No LN/FSI imsb kit would be installed. A full rebuild is the only realistic solution.
Its that simple, you're to late to save this engine and any thinking you might be able to save it is going to end up with a spun bearing much sooner than later.
So most in your situation don't believe the outcome predicted from the pre imsb qualification test. Some do and opt for a rebuild before any more damage is done, hoping to save the crank and other reciprocating parts that probably are already blitzed.
Some go ahead with a new cheapy imsb install and try to clean out as best as possible. Unfortunately without tearing down engine fully no way to clean it out. And from the looks of your pics, hardened metal debris has been circulating thru your engine for a while now, the damage is already done,,, do you have rod knock/bearing noise now..? A spun rod/crank bearing is coming soon to this engine if its run.
Unfortunately many have no choice but to run it like it is, as the expense of a good fix probably will cost as much as the car did Some flip car like it is, with or without disclosure.
Sorry this happened to you. Look thru the forum for solutions to your situation, there are many, they 're all expensive...
jmho
It needs a full tear down to clean out all the metal out of the oil gallerys and to inspect the bearings to determine what all is needed. Sorry you have to go through this. Good luck with it.
Mark
How was the engine running prior to your IMSB work? Smoke, noises, the usual stuff.
You will never, ever, get all of the bearing debris out of the engine without completely tearing it down. The question then becomes, how much do you want spend. You could replace the bearing as cheaply as possible and keep driving until symptoms get really bad, or you could do a full teardown now. Not much in between -- for honest folks.
The wear marks inside the IMS and the shaving around the outer race let me think that the bearing outer race has turned within the IMS instead of being press fitted inside of it.
Does the bearing rotate at all or is it solid?
Disassemble and rebuild or sell it like it is to someone who is feeling lucky.
As others have said the amount of damage done to bearing shell, big ends, oil pumps lifter bores and cilinder walls can only be assessed by looking at all the parts.
For those who swear the IMSB issue has been "fear mongered" here is just one of many case in points...
I'll bet the OP wishes he or the previous owner had replaced the IMSB earlier in it's life...
Op sorry to see this...
Hey PT3, got quick question for ya...
How much hardened metallic flakes/debris from the imsb races flaking off does it take to trigger a cold start filter bypass that floods/dumps into the main oil gallery all that metallic debris stored in the bottom of the oil filter canister, dumping it all directly into the engines bearings at 5 bar +....???
The oil filter by-pass is not JUST for clogged oil filters .... It can and does open sometimes on cold starts when conditions are right.....This is intentional and Engineers know this and it only take 8-12 psi differential pressure to open the by-pass ...
The problem is that on the OEM filter housing for 996/7 the by-pass valve is in the very bottom of the filter housing where heavy ferrous metals will collect/rest , then when the valve opens any heavy metals will go straight into all lubricated parts....Other oil filter designs has the by-pass at the top so are not a concern.
That's why I have eliminated the by-pass on all my m96/7 engines and have posted numerous times about it....I'm quite happy with how fast my oil pressure comes up on cold start in just 1-2 seconds even with 10w-60 oil on sub-freezing temps... and it never ever get anywhere near clogged up filter...
What's the longest you've gone without changing the oil filter? I have the LN billet canister with the bypass eliminated and I wonder about the filter often.
The Porsche Engineers original recommended oil filter change was every other oil change or every 2 Years so 24k to 30k miles on 996/997 m96/7 engines ( they extended the service interval around 2005 ) with OEM cartridge filter so i wouldn't worry about a clogged filter unless something is going wrong with the engine....
Is that bearing original? All of that material is ferrous? I agree with another poster that it looks like it may not have been in there tightly. What does the cover look like?
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