Another IMS bearing thread

[rp17]

Originally Posted by boxster

This issue is driving me crazy. Today I started the car and stayed trying to listed for any noises. I couldnt hear anything from inside the car. then I went near the rear wheels and also couldnt hear anything. then I crawled under the car, and could hear some light ticking sounds, (tick tick tick tick.....) but I have no idea where its coming from exactly, or if it has anything to do with the IMS bearing. the noise is hardly noticeable. but if you crawl under the car and try to block out the exhaust sound, you can hear it. Any ideas what it could be? does it have to be the bearing? or is it normal for a boxer engine perhaps?

I had a ticking noise at one point also. Had my bearing done not too long ago and my bearing was fine. That of course is without cracking it open. Turned good though. Usually thats a lifter if I'm not mistaken. Take with a grain of salt.

[san rensho]

My motor has a bit of a tick, which I think is probably an injector, they can be fairly loud, or possibly something in the valve train, but it goes away, or at least I can't hear it, as soon as I accelerate past idle. I'm not worried.

If you want trace the sound, you need a stethoscope. Put the probe right against the IMSB housing and on both tensioners and listen for anything abnormal.

[Jake Raby]

As my attempts to provide a better seal for the IMS bearing seem to be harder than I was hoping at this point,

You thought any of this would be easy?

[Walter White]

I have the ticking too. I am not too worried about it. I think it could be injectors, lifters, maybe exhaust leaks or loose spark plugs. Comes and goes. Sometimes left side, sometimes right. Sometime when cold, sometimes when hot.

[Walter White]

I hit the "Submit" button before I could post pictures.

[Walter White]

Dag nabbit! I did it again. If there is a way to delete these post please let me know.

[Nine8Six]

Lathes are for cutting and don't forget to change your oil often. And your bearing will be just fine!

[Walter White]

Even more bad ideas

[Jake Raby]

And just how are you going to machine or EDM that pathway through the flange?

[Nine8Six]

It's easy, you vise the part 45degree and you pour 2 drops of 98% H2SO4 in the cavity (sulfuric acid) and wait overnight

Joking aside, that flange will be need to become a quite advanced assembly on it's own if you go this path. I see a 3 pcs (min) flange assembly

[Jamesp]

From a machining perspective, eliminate the 45 leg and drill 2 holes, or if you're heart is set on the 45, drill it from the surface and plug the surface hole. In any event, it appears the path of this hole could be simplified.

[Jake Raby]

just a supplement to the oil feed the engineers already provide.

What oil feed is that?? You lost me.

One issue that leads to wear is longitudinal thrust loads and the ball bearing trying to control them while providing radial support as well. With bank #1 dragging the IMSB sideways and the IMS Tensioner paddle doing the same all these forces challenge both axis of the assembly.

[Nine8Six]

Having now seen all kind of tricks RE "the remedy of the IMSB", I take it that nobody really understand the "real" cause of failure of the IMSB? Would that be correct?

Lack of lubrification, high pressure, oil contaminations, driving style, luck/bad luck, karma, or all of these combined maybe?

I respect all those who have brilliant ideas like Walter but man, no prototyping, no testing, no data acquisitions methods, not even a simulation..... you guys have a lot of courage drilling these things

[Nine8Six]

irrelevant. .delete

[Jamesp]

So the oil pump is driven by the IMS shaft. How about a small oil passage through the hex key from the oil pump to the interier of the IMS shaft and an open bearing at the other end? Plenty of oil, and might be an easy mod. plus your stealing oil from the best place possible.

A small hole in the oil pump driven gear connecting with a passage through the center of the hex drive key, and another small hole through the IMS end fitting at the bottom of the hex drive hole would do the trick.

Couple that with a creamic bearing for overkill. Voila!

[Walter White]

Now that is something even I would be afraid to try. I am more comfortable with things that can be easily set back to original if things don't work out.
But I am certainly interested in the idea.

Could the oil from the pump be done without removing the IM shaft?
I have been intending to experiment to see if oil in the shaft would affect balance. I would think not, it would just distribute itself evenly inside the shaft I would assume.

[Jamesp]

Originally Posted by Walter White

Now that is something even I would be afraid to try.

I think you could warm up to it. Your posts on bearings shows you are comfortable with new ideas.

[Walter White]

Originally Posted by Jamesp

I think you could warm up to it. Your posts on bearings shows you are comfortable with new ideas.

Absolutely. I am anxious to hear more. I am not familiar with the shaft and pump arraignment so it is a little hard for me to understand the details.
I may be a hard sell because right now grease is my first choice. Grease is good. If hope I can make grease a viable lubricant for the IMSB.
When I saw how superior the Nachi seal is to any others, I realized that keeping grease in and oil out may not be impossible.

[Jake Raby]

The patent is part of another claim.

Hell, we have even been patenting the bad ideas, because if we don't someone will "invent them" 5 years later and claiming they are the best thing since sliced bread.

There are times when security means going absolutely over the top, which wastes money and drives the price of the final products up.

When going through these processes we have to think like the enemy and consider any possible other way to reach a similar goal. We have three more patents filed at the present and two more ready to file.

[Jake Raby]

I think we all hijacked it!