changed my ims bearing. was like new

[geraintthomas]

Nice to hear.

I'm not going to touch mine I don't think. I've heard some people having a failed IMS bearing AFTER they've changed it, and it's written off the engine. Some people have had the original bearing and are over 200,000 miles.

So people have had them fail before and after changing them, and some people have had no problems on original and new bearings. But like you, I'll check mine when it comes to changing the clutch.

Good one though

[Gelbster]

The causes and modes of failure of the M96 IMSB are many and even now , not completely understood.
The responses to the risk of IMSB failure vary from preemptive upgrades that will easily outlast the engine to prayer.
It all depends if you want to rely on Engineering or hope. You are correct , many of the 'hope' guys have been lucky.
As for the "I replaced my IMSB and then the engine failed" cases - there are 14 pages of Instructions mostly single spaced with revisions and updates- that the average DIY guy seldom finds or follows to the letter. If these specific Instructions are ignored ,yes the new IMSB may fail,possibly with collateral damage. And then there are the essential ,expensive Special Tools that may not have been used ?
IMHO the main advantage of a pre-emptive IMSB replacement is that it is more likely you pass the pre-qualification test. Which is another problem - many IMSB replacements do not mention following the pre-qualification checks. So those guys are in the 'hope' category also.
So your cars with original and perfect IMSB's are gems !

[boxster]

Originally Posted by Gelbster

The causes and modes of failure of the M96 IMSB are many and even now , not completely understood.
The responses to the risk of IMSB failure vary from preemptive upgrades that will easily outlast the engine to prayer.
It all depends if you want to rely on Engineering or hope. You are correct , many of the 'hope' guys have been lucky.
As for the "I replaced my IMSB and then the engine failed" cases - there are 14 pages of Instructions mostly single spaced with revisions and updates- that the average DIY guy seldom finds or follows to the letter. If these specific Instructions are ignored ,yes the new IMSB may fail,possibly with collateral damage. And then there are the essential ,expensive Special Tools that may not have been used ?
IMHO the main advantage of a pre-emptive IMSB replacement is that it is more likely you pass the pre-qualification test. Which is another problem - many IMSB replacements do not mention following the pre-qualification checks. So those guys are in the 'hope' category also.
So your cars with original and perfect IMSB's are gems !

I hope I didn't make a mistake in changing the bearing after all!! Hehe, well, my mechanic followed instructions carefully, used the necessary tools, (that I bought), and followed torque settings etc. I'm hoping for the best. If the new bearing does fail, I guess it will be my fault for wanting to change it in the first place!!