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Old 03-31-2015, 01:53 PM   #1
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IMS bearing cover identification

In the middle of a clutch job for a 98 and when I pulled the flywheel found an IMS bearing cover that did not appear factory as it had no markings at all. Whose IMS bearing cover is that? The previous owner had no paperwork so we are only guessing that the bearing has been addressed at sometime in the past.

Is it true that all factory IMS bearing covers had markings (Germany - for example)?

Thanks, Joe
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Old 03-31-2015, 02:09 PM   #2
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Originally Posted by Xcellr8 View Post
In the middle of a clutch job for a 98 and when I pulled the flywheel found an IMS bearing cover that did not appear factory as it had no markings at all. Whose IMS bearing cover is that? The previous owner had no paperwork so we are only guessing that the bearing has been addressed at sometime in the past.

Is it true that all factory IMS bearing covers had markings (Germany - for example)?

Thanks, Joe
Without seeing the actual cover, it is hard to tell. Porsche actual produced a replacement cover that had better seals to cure oil leaks that looked somewhat different than the factory flange cover.
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Old 04-01-2015, 08:55 AM   #3
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My original cover just has what looks like a 'K' on it - there is also some letters on the bolt heads but hard to read. The old bearings themselves have 'NSK' on them.
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Old 04-01-2015, 11:37 AM   #4
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Perhaps an oddball after-market IMSB . For example EPS ?
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Old 04-01-2015, 12:37 PM   #5
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Well that's strange. Now I am wondering why my cover looks different? Mine has no marking other than the 'K' thingy or should it look like the one on the right?
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Old 04-01-2015, 09:14 PM   #6
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Not odd, just an early dual row flange. I threw away about 400 of them yesterday.
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Old 04-02-2015, 04:49 PM   #7
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Do you have an O ring on the cover? They leak. You can use sealant when you install your bearing cover to minimize the chance of an oil leak. Apply the sealant to the bearing cover (not the block) inboard and over the O ring. When you install the cover the sealant will provide the seal the O-ring lacks. If you put the sealant on the block, the cover will just push it into the block. Make sure all surfaces are cleaned with acetone before applying the sealant and assembling. My 2cents
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Old 04-12-2015, 09:47 AM   #8
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Can you identify this flange?

Thanks everyone for helping. Attached is a photo for the OP. Its not as clear as I had hoped. However, there is no "K" present, so I'm still wondering whose cover, or I should say flange, is this? NJBray had good photos of the factory flanges I'm familiar with.

Can someone identify this flange?
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Old 04-12-2015, 10:05 AM   #9
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Overlook the numbers, they are not significant.

Look at the depth of the positioning of the center nut. deeply inset are single row bearings, those with a shallow inset are dual row.

Xcellr8, your pic is a dual row- no doubt.
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US Patent 8,992,089 &
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Old 04-13-2015, 01:50 PM   #10
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Quote:
Originally Posted by Jamesp View Post
Do you have an O ring on the cover? They leak. You can use sealant when you install your bearing cover to minimize the chance of an oil leak. Apply the sealant to the bearing cover (not the block) inboard and over the O ring. When you install the cover the sealant will provide the seal the O-ring lacks. If you put the sealant on the block, the cover will just push it into the block. Make sure all surfaces are cleaned with acetone before applying the sealant and assembling. My 2cents
Does anyone have a part number for the oring that came on those original flanges? I only seem to find replacement seals for the updated flange.
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