Engine/Transmission (1994 - 1998) Vibration dampner rubbing

[Johnstra]

A while back I posted that after I tabbed my KDP I noticed a rubbing sound that wasn't there before. I believe my vibration dampner is rubbing very slightly against the timing case. I know there is a rubber 'bumper' on the back of the dampner, but should it actually be making contact with the timing case? Can the dampner be shimmed with washers to prevent this?

Thanks,

-john

 

[SRadke]

Could it be rubbing on the crank position sensor? If so it's in slots just loosen and slide back a little. That's way easy to do if it's the situation.



-Scott

 

[Johnstra]

No, I've checked and double-checked the CPS. I think it has a . 049" clearance, which is within spec. Now I don't know how much wobble the dampner might have in it, but there are no signs on the dampner surface the the CPS is rubbing.

-john

 

[SRadke]

I suppose it's possible you've got some sort of crud behind the dampner that would make it wobble but that would be easy to see at idle. You've got me

 

[Johnstra]

Anybody else have any thoughts on this? Is shimming the dampener an option or will that cause problems?

Thanks,

-john

 

[JFaughn]

I would take the damper off and look for the indicator marks on the damper, then go to the corasonding spot on cover , most liky is that it didn't go back together just the same, but I would not shim it , find the problum insted of covering it up , if you start changing things you may need to then change the CPS ajustment , and whats next.

 

[Johnstra]

The dampener doesn't have any indicator marks on it does it? I didn't think it mattered how it went on. Are you sure about it has a correct position?

Thanks,

-john

 

[Johnstra]

I found some threads that talk about vibration dampers wearing out. I haven't pulled mine off yet, but looking up at it from underneath I can see the rubber protruding about 1/8". Does that sound right or is mine starting to walk out?

-john

 

[SRadke]

Shimming bothers me in that it will throw off the belt alignment.

 

[Johnstra]

I agree with you Scott. I can get a new balancer from Cummins for $142. I talked to one of the techs at Rocky Mountain Cummins and he said the rubber should not be protruding at all. He said if mine is sticking out 1/8" it should be replaced. So I went ahead and ordered one.

-john

 

[TRCM]

I don't know about the diesels, but a gas engine, the damper has a secific way it goes on... it is keyed to ensure it is on correctly. Even on an internally balanced engine.

 

[hsmith]

I have replaced two, not because they were rubbing, but you could see the outer ring separating from the rubber.

 

[SRadke]

I don't know about the diesels, but a gas engine, the damper has a secific way it goes on... it is keyed to ensure it is on correctly. Even on an internally balanced engine.

No key on a 5. 9

 

[Johnstra]

Much Better!

I got the new harmonic balancer on today. The old one was definitely ready to be retired. The inner/outer sections hadn't slipped yet, but the rubber was definitely coming out.

-john