Another IMS bearing thread

[Walter White]

Originally Posted by Jamesp

Here was the thought, sizing the oil hole to allow only a tiny bit of oil (very small hole) would be critical. Additionally the small hole would have a small effect on key strength. Key material could be upgraded if that were found to be a problem.

Your engine is out. Are you going to do it?

[Jake Raby]

The hex drive for the oil pump is floating. Also, how are you going to facilitate passing oil through the partition between the oil pump drive and the interior of the IMS tube?

This has already been done, and you will find other complications as you progress.

[Walter White]

On the later model IMS bearing, the larger sized bearing, is the bolt pressed into the inner race or is it a slip fit?

[Jake Raby]

Originally Posted by Walter White

On the later model IMS bearing, the larger sized bearing, is the bolt pressed into the inner race or is it a slip fit?

Buy one and find out! This stuff isn't supposed to be easy, or cheap.

[Jamesp]

Originally Posted by Walter White

Your engine is out. Are you going to do it?

I'm thinking this is round 2 if the grease continues to leave the bearing with the modifications I've already made to the IMS currently in my engine. I plan to replace the clutch and flywheel in about 15k miles and I already have a spanking new Nachi greased sealed bearing in place. I'll go with the modified key concept drawn below if the grease has left the bearing, and to answer Jake's question, a hole at the bottom of the hex drive hole in the IMS shaft will communicate oil pressure between the oil pump and the inside of the IMS tube. I'll top that off with an open (silicon) ceramic bearing open at both sides. and Jake, can you shoot me the patent number on this? I'd like to see what's been done so far in this area. The size of the hole is an interesting point, it would be nice to fill the IMS tube with a mist, not just dump oil in there. And Walter, why do you say the oil on the high pressure side of the pump is dirty?

[Walter White]

Originally Posted by Jamesp

Walter, why do you say the oil on the high pressure side of the pump is dirty?

Sorry, I didn't meant for it to sound so bad. What I mean is it is unfiltered and has not been through the cooler yet. I think it comes straight from the sump into the pump.

[Jamesp]

Originally Posted by Walter White

Sorry, I didn't meant for it to sound so bad. What I mean is it is unfiltered and has not been through the cooler yet. I think it comes straight from the sump into the pump.

I don't have a handle on the overall oil flow path yet, even if it was cooled before the trip into the IMS, it wont be cooled when it hits the bearing. More learning.

[Walter White]

You might be able to place a filter inside the tube. Maybe a series of fine mesh screen. They could also serve as an anti-slosh device.

[Jamesp]

Originally Posted by Walter White

You might be able to place a filter inside the tube. Maybe a series of fine mesh screen. They could also serve as an anti-slosh device.

I'll point out the obvious that splash oil comes out of the pan, so for anyone who is an open bearing splash oil advocate there you are, and, I'm in your camp.