which ims bearing upgrade

[thstone]

Originally Posted by Smallblock454

OK, now i think we need a list what can fail in the engine compartment.

Here is a short list. These are NOT what-if's. These are real world failures that can and do occur.

Now you know.

Of course, I am not doing this to scare anyone. I'm just saying that there is a lot of other things that can cause engine failure that have nothing to do with the IMS bearing. I'm the guy who has never replaced an IMS bearing in the three M96 powered cars that I have owned and all have gone over 145,000 miles.

M96 Failure List
1. Cylinder D-chunk
2. Cracked cylinder
3. Loose cylinder sleeve
4. Porous engine case
5. Spun rod bearing
6. Rod bolt failure
7. IMS bearing failure
8. IMS gears not fixed to intermediate shaft (press fit failure)
9. Timing chain failure
10. Timing chain tensioner (paddle) failure
11. Valve lifter failure
12. Valve lifter carrier failure
13. Crankshaft failure
14. Cracked head
15. Head gasket failure
16. Oil starvation (high g cornering)
17. Variocam servo failure
18. Blocked oil pickup (excess engine sealant, aka spaghetti)
19. Oil pump drive shaft failure (hex shaft)
20. AOS failure resulting in oil hydraulic lock in cylinders

[Gelbster]

Mr Stone gets us back to the facts.
And the useful extension of these sad facts is to list the solutions/preventative measures.
The dismissive assertions to drive it like the Dr.Ing. P intended ,don't magically solve many of these issues.
The good news is that there are remedies for most of these issues. But to address them is a economically non-viable. I know only because(illogically) I have done most of the remedies. So has Mr.Stone. It is painful.

[boxster]

Originally Posted by thstone

Here is a short list. These are NOT what-if's. These are real world failures that can and do occur.

Now you know.

Of course, I am not doing this to scare anyone. I'm just saying that there is a lot of other things that can cause engine failure that have nothing to do with the IMS bearing. I'm the guy who has never replaced an IMS bearing in the three M96 powered cars that I have owned and all have gone over 145,000 miles.

M96 Failure List
1. Cylinder D-chunk
2. Cracked cylinder
3. Loose cylinder sleeve
4. Porous engine case
5. Spun rod bearing
6. Rod bolt failure
7. IMS bearing failure
8. IMS gears not fixed to intermediate shaft (press fit failure)
9. Timing chain failure
10. Timing chain tensioner (paddle) failure
11. Valve lifter failure
12. Valve lifter carrier failure
13. Crankshaft failure
14. Cracked head
15. Head gasket failure
16. Oil starvation (high g cornering)
17. Variocam servo failure
18. Blocked oil pickup (excess engine sealant, aka spaghetti)
19. Oil pump drive shaft failure (hex shaft)
20. AOS failure resulting in oil hydraulic lock in cylinders

There's also the solenoid, which I have had to replace just after I bought the car,because it was idling rough. That was a BIG expense!!