LN bearing life
02-18-2016, 11:05 AM
#61
Rennlist Member
So I just replaced my original slipping clutch and original IMS which looked good as new with an LN classic single row on my 2002 Porsche 996 C2 with 90000 miles. LN mentions the ceramic is 3-5 times stronger than steel bearings but gives a 4year/50000 miles interval so my question is if my original IMS lasted 90000 miles and still good, then shouldn't the LN bearing last at least 90000 miles? Or are they trying to push parts every 4 years for profit.
Wayne recommends 30k miles for his kit that uses the OES bearing.
Some choose not to replace their bearings. Some find their original bearing is fine and likewise, some find that their original bearing was just about to fail.
Many modern engines have timing belts that need to be replaced every 4 yr, 50,000 miles, but most choose not to change it.
We all have choices.
02-18-2016, 11:57 PM
#62
Instructor
Timing belt interval
Like Jake stated, the original bearing should have had a service interval. It didn't. We have to come up with what we believe is a very conservative service life considering the huge range of mileages we have seen failures.
Wayne recommends 30k miles for his kit that uses the OES bearing.
Some choose not to replace their bearings. Some find their original bearing is fine and likewise, some find that their original bearing was just about to fail.
Many modern engines have timing belts that need to be replaced every 4 yr, 50,000 miles, but most choose not to change it.
We all have choices.
Wayne recommends 30k miles for his kit that uses the OES bearing.
Some choose not to replace their bearings. Some find their original bearing is fine and likewise, some find that their original bearing was just about to fail.
Many modern engines have timing belts that need to be replaced every 4 yr, 50,000 miles, but most choose not to change it.
We all have choices.
02-19-2016, 12:02 AM
#63
Former Vendor
Actually I refused to replace my original timing belt on my 1986 Porsche 928 @ 45k miles interval until my water pump started leaking around 100k miles and did the belt, pump and tensioners. What Puzzles me is if the ceramic is so robust with no seals, then does it really matter if it's submerged in oil for 4 years and not driven.
02-19-2016, 10:14 AM
#64
Rennlist Member
Actually I refused to replace my original timing belt on my 1986 Porsche 928 @ 45k miles interval until my water pump started leaking around 100k miles and did the belt, pump and tensioners. What Puzzles me is if the ceramic is so robust with no seals, then does it really matter if it's submerged in oil for 4 years and not driven.
It would sound like you are questioning the use of a ceramic hybrid bearing. Do some searches and you'll see why we chose this type of bearing for all the IMS Retrofit kits. Our bearings are not out of a catalog or sitting on a shelf somewhere either - they are custom made for us.
02-19-2016, 02:14 PM
#65
Instructor
Long drain interval
[QUOTE=Charles Navarro;13031482]Long drain intervals with owners who think they don't have to change their oil every six months regardless of mileage is the exact reason we go with time or mileage recommendations. Remember, cars that are barely driven or subjected to crazy long drain intervals seem to fail more often.
It would sound like you are questioning the use of a ceramic hybrid bearing. Do some searches and you'll see why we chose this type of bearing for all the IMS Retrofit kits. Our bearings are not out of a catalog or sitting on a shelf somewhere either - they are custom made for us.[/QUOTE
I know for sure ceramics are more chemical resistance but my original IMS bearing lasted 13 years and 90k miles in good condition. I live in southern Califirnia. I did 12K miles DIY oil change mobile synthetic 0w-40 and sometimes it took 2 years. Sometimes car sat in the garage for months connected to a battery maintainer during my overseas trips. My original IMS has the following stamped on it: England NSK 6204DUI7 782. I'm hoping to get at least 90k miles on the LN classic. The only reason I did the upgrade is because of the clutch and in case I decide to sell the car to a picky buyrr. As I mentioned before, we have a better chance of getting cancer than an IMS failure. Thank you for all your replies.
It would sound like you are questioning the use of a ceramic hybrid bearing. Do some searches and you'll see why we chose this type of bearing for all the IMS Retrofit kits. Our bearings are not out of a catalog or sitting on a shelf somewhere either - they are custom made for us.[/QUOTE
I know for sure ceramics are more chemical resistance but my original IMS bearing lasted 13 years and 90k miles in good condition. I live in southern Califirnia. I did 12K miles DIY oil change mobile synthetic 0w-40 and sometimes it took 2 years. Sometimes car sat in the garage for months connected to a battery maintainer during my overseas trips. My original IMS has the following stamped on it: England NSK 6204DUI7 782. I'm hoping to get at least 90k miles on the LN classic. The only reason I did the upgrade is because of the clutch and in case I decide to sell the car to a picky buyrr. As I mentioned before, we have a better chance of getting cancer than an IMS failure. Thank you for all your replies.
Last edited by NIACAL4NIA; 02-24-2016 at 07:33 PM.
02-19-2016, 02:29 PM
#66
Race Director
Technically true, but since the odds of developing some form of cancer during your lifetime (assuming you are an American male) is 43.31%*, I don't think that's as amazing a comparison as you think it is. 
Numbers accurate as of 10/2014
Numbers accurate as of 10/2014
02-27-2016, 12:28 AM
#67
Racer
Join Date: Aug 2011
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In a conversation with Jake R ( i was thinking about getting some work done by them but I had already had the LN bearing upgrade fitted a few k miles ago) that I should just go ahead and drive it for 50k miles on the bearing then think again about having it replaced or "the solution" fitted.
03-04-2016, 12:27 PM
#68
Track Day
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50k miles sounds pretty poor to me. I feel it should last the remaining life of the engine. Timing belts are made of rubber, and they last 60k miles, timing chains last for life. Recommending that the ceramic bearing is replaced every few years, smacks of a lack of confidence in what they've made, my opinion only of course. I'll fit something else when my clutch needs replacing.
03-04-2016, 12:47 PM
#70
50k miles sounds pretty poor to me. I feel it should last the remaining life of the engine. Timing belts are made of rubber, and they last 60k miles, timing chains last for life. Recommending that the ceramic bearing is replaced every few years, smacks of a lack of confidence in what they've made, my opinion only of course. I'll fit something else when my clutch needs replacing.
03-04-2016, 02:41 PM
#71
Pro
If the original dual row had a failure rate of 1% I would guess the LN Pro Dual Row upgrade with ceramic bearings and seals removed to allow splash lubrication of bearing would have a failure rate of .01%. Nothing scientific just my wild *** guess.
