02-06-2013, 01:20 PM
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#1
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,605
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LN's site still lists both style bearings (single and dual row), and I have not heard of any plans to discontinue the single row style.
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
Last edited by JFP in PA; 02-06-2013 at 02:30 PM.
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02-06-2013, 02:25 PM
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#2
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Registered User
Join Date: Dec 2012
Location: Jackson Hole, Wyoming
Posts: 800
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Another IMSB related question. I was going to have a "Preferred Installer" in Pasadena CA put an LN ceramic IMSB in my 2003 Boxster S that I recently bought, for peace of mind. Then, low and behold, today I discovered the service booklet with the owner's manual, which says the engine was replaced in October of 2006 (not IMSB related). My question is, what should I do? I know that after 2005, the engine cases need to be split to install the IMSB. Is my only reasonable recourse to get the engine number and see which bearing it needs? I don't want the installer to pull the transmission and clutch, only to find out that I don't have the single row bearing. I don't need a clutch, it was just recently replaced, and the dealer said the IMSB looked fine, whatever that means. Suggestions?
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02-06-2013, 02:38 PM
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#3
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,605
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Quote:
Originally Posted by Joe B
Another IMSB related question. I was going to have a "Preferred Installer" in Pasadena CA put an LN ceramic IMSB in my 2003 Boxster S that I recently bought, for peace of mind. Then, low and behold, today I discovered the service booklet with the owner's manual, which says the engine was replaced in October of 2006 (not IMSB related). My question is, what should I do? I know that after 2005, the engine cases need to be split to install the IMSB. Is my only reasonable recourse to get the engine number and see which bearing it needs? I don't want the installer to pull the transmission and clutch, only to find out that I don't have the single row bearing. I don't need a clutch, it was just recently replaced, and the dealer said the IMSB looked fine, whatever that means. Suggestions?
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If the engine was replaced in October of 2006, it has the non-serviceable oversized IMS bearing that would require a full engine tear down to replace. But you still have some options: Add a Guardian warning system, which would alert you should the bearing (or other major component) start to go south. Switch to a high ZDDP full synthetic oil, add the LN spin on filter and magnetic drain plug. If at any time in the future the trans has to come out, like a clutch job, have the rear seal removed from the OEM IMS bearing so it gets splash lubrication. Any, or all, of these would help in the long term.
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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02-06-2013, 02:44 PM
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#4
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Registered User
Join Date: Dec 2012
Location: Jackson Hole, Wyoming
Posts: 800
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JFP in PA, the installer says he thinks they would have put a 2003 engine in a 2003 Boxster, even in 2006. I wonder if maybe he just wants to work on the engine. Sounds like I need to get the engine number and try to see if Porsche can tell me if it is a 2006 engine, or an older one that would have the single row bearing. Can you tell me where the engine number is?
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02-07-2013, 05:10 AM
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#5
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Registered User
Join Date: Aug 2005
Location: Sanford NC
Posts: 2,574
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The installer doesn't know Porsches like he says he does.
See Jake's post of yesterday where he says the only way the car got a second-gen IMS engine was if someone somewhere someone had squirreled away a engine for several years as all the engines even for several years prior to when yours was done were third generation IMS setups.
And they didn't tend to sit around as they were used as replacements pretty quickly. No one wants an inventory of $10k+ engines sitting around. And I recall that even the US Porsche distributor usually had about 10 several years ago so they were moving them out at a pretty good clip.
Jake knows, he is inside these engines more than anyone around. He has seen all the surprises.
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02-07-2013, 05:18 AM
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#6
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Registered User
Join Date: Dec 2012
Location: Jackson Hole, Wyoming
Posts: 800
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Thanks guys. I'll check the serial number, but it sounds like an M97 engine is probably in there.
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02-07-2013, 02:16 PM
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#7
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Registered User
Join Date: Dec 2012
Location: Jackson Hole, Wyoming
Posts: 800
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OK. I got the serial number off the engine. It's M96/24AT67465645. So my (last?) questions are: there is really no way to know by the serial number if that is a single row bearing or not, correct? Or were all M96 engines single or double row, and all M97 engines non-removable (without splitting the cases) IMSB? I just hate to have the tranny, clutch and flywheel removed to know (I don't need a clutch). Or is that the only way to be sure? As I mentioned the engine was replaced in October of 2006. Thanks all for your help and patience  !
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