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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHLNEngineering Replacement IMS Bearing
Leading reported evidence
Lubricate by splash as well as submersion lubrication (depending
Performed · outcome unconfirmed
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Read evidence and context
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Performed · outcome unconfirmed · Original poster
Coupled with the lack of grease seals, the new bearing is lubricated by splash as well as submersion lubrication (depending on operating conditions)......."
Leading evidence: 'Lubricate by splash as well as submersion lubrication (depending' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Lubricate bearing' (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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Performed · outcome unconfirmed · Original poster
Quick question for those of you who've used the replacement bearing.
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Suggestion
It might look like there's no room, but oil will pass around that shield and lubricate the bearing.
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Suggestion
Those black rings are definitely seals and not cages, the question now becomes whether this is a "running change" by LN/FSI to avoid larger metallic particles elsewhere in the engine from entering into the IMS bearing and destroy it?
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Suggestion · Original poster
"With our IMS Retrofit� and IMS Upgrade, we chose to use a ceramic hybrid bearing which requires less lubrication and is designed specifically for poor lubrication environments.
Lubricate by splash as well as submersion lubrication (depending
No successful repair reported for this finding.
0
Reported fixes
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Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed · Original poster
Coupled with the lack of grease seals, the new bearing is lubricated by splash as well as submersion lubrication (depending on operating conditions)......."
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
Those black rings are definitely seals and not cages, the question now becomes whether this is a "running change" by LN/FSI to avoid larger metallic particles elsewhere in the engine from entering into the IMS bearing and destroy 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 · Original poster
"With our IMS Retrofit� and IMS Upgrade, we chose to use a ceramic hybrid bearing which requires less lubrication and is designed specifically for poor lubrication environments.
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18 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Quick question for those of you who've used the replacement bearing. I believe at least one person has done the work recently............
On the LN website, i states that the new bearing has better lubrication due in part to the lack of a seal on the bearing. I received my bearing today and in looking at it, it is "sealed" back and front??
Tried to call them but they are obviously not working today.
Has anyone exprienced the same thing with their bearing? if so did you ask LN about the "no seal" statement on their site?
Many thanks
Les.
The seal on the OEM bearing was supposed to be hermetic - permeant - but heat , normal wear and thinner oil corrupts those, and the heavier lube - which is a grease gets flushed away - your new LN bearing is closed but not sealed in the manner in the OEM was. So it closed to prevent big things from getting to the bearing - but oil and lubricants can still work in the race. I don't have one - but that was my understanding
Where did you find this info machbx? Here's what the LN site has to say about their new bearing..........
"With our IMS Retrofit� and IMS Upgrade, we chose to use a ceramic hybrid bearing which requires less lubrication and is designed specifically for poor lubrication environments. Coupled with the lack of grease seals, the new bearing is lubricated by splash as well as submersion lubrication (depending on operating conditions)......."
I sent an email off to them to try to remove my confusion but wanted to see if anyone has any first had experience of handling this new bearing. I expect to hear back from them Monday. I'll let the list know of their reply.
The bearing is shielded but not sealed. It might look like there's no room, but oil will pass around that shield and lubricate the bearing.
So far so good on my LNE bearing; about 20k miles now.
This is one of the pix I took at a local shop last week, the one on the right is the larger OEM single row bearing from a later 996/997, the on the left is a brand new out of the box LN dual row bearing.
The black seal on the OEM bearing is clearly evident, there is no seal on the LN bearing, there is a metal "cage" but not a full face seal like the OEM bearing.
FWIW, I also took pix and felt an OEM dual row bearing, it looks exactly the same as the LN bearing in terms of the metal "cage".
OP, do you have the single or dual row bearing? Does it look like the LN bearing on the left of my pix in terms of the metal "cage" or does it have full face seal similar to the single row bearing on the right?
Forgot I had a side-by-side OEM vs. LN dual-row bearing pix.
On the left is the OEM, on the right is a brand new LN bearing.
What I forgot to ask, and not sure if the shop would have remembered, is if the OEM bearing had a full face seal on both sides of the bearing........., maybe Jake or others who have done it recently can pop in and clarify.
Now you see, I didn't know the M97 had a larger diameter than the M96 bearing. Thanks for that info.
I'm taking a real keen interest in the M97 bearings...seeing as I have one in my 2002 996.
For what it's worth...my M97 has 80K miles on it and it's not leaking or shedding iron. It's a daily driver (when I'm not riding the M/C) so It will have 100K miles soon.
Given that selling a high mileage 996 is as good as impossible - I hope to be providing mileage updates for years to come.
Here's a couple of pics.......the mark on the back side of the bearing is grease. If you compare the different LN bearings you'll see that this one's cage looks quite different from the others, and in fact to me looked like a seal, hence the initial question.
Those black rings are definitely seals and not cages, the question now becomes whether this is a "running change" by LN/FSI to avoid larger metallic particles elsewhere in the engine from entering into the IMS bearing and destroy it?
I can partially see the logic to isolate the root cause when an engine "expires" unexpectedly in the future after the LN bearing had been installed, i.e. whether the LN/FSI bearing failed on its own (particles within the bearing cavity) or when other metallic components in the engine failed (no damges in the bearing cavity).
But this is only my speculation, only LNE/FSI can provide a conclusive response.
Ok, some more info......in looking at the bearing more closely, the black ring on the "back" is clearly made of some kind of soft material such as would be expected on a seal. The black ring on the front.......two things....1) it rotates when the stud is rotated....2) it is defininelty made of a metal or metallic substance and there is definitely a very small gap between the edge of the thing and the innerds, allowing you to see the edges of the ***** when you rotate the stud.
So, I think the front ring must be the cage, albeit quite different from the cages pictured on LN's website.
I'm going to send the pics to LN and ask for their confirmation.
I sent pics to LN and they responded a short while ago. The bearing I have is indeed a single-sided-seal bearing.
So, if you purchase a single row replacement bearing from LN, it should look like the one in my pics.
Thanks to all for your input/comments.
This is a source reference. Confirm exact model applicability in the original material.
