OM617 Crank Pulley Wobble

[ashedd]

Ok so I noticed a metallic "clang" from the front of my SD at idle, goes away at anything above. I looked at the crank pulley because I had a similar noise a few years ago and it turned out to be loose crank pulley bolts.. I notice the pulley is wobbling a bit.

So today I try to tighten down the obvious, as I thought, loose bolts. I only found 2 that moved when I tried to tighten them. I still have the wobble and the noise it getting worse. I took a vid but lost it somehow.

I am thinking that my balancer/damper got damaged when I lost several pulley bolts a few years ago. It perhaps took this long to reach it's failure point.

So crank pulley wobble = bad balancer?

[kerry]

Probably.

[ashedd]

That's what I feared. Do you think a used one from the yard is worth a try?

[tangofox007]

Is the balancer (crankshaft) bolt loose?

[ashedd]

Originally Posted by tangofox007

Is the balancer (crankshaft) bolt loose?

I dunno but that doesn't seem likely.. isn't the torque on that pretty high? I was busy with several other things today.. I will put the SD on jack stands now that my maintenance spot is open. What size is that crank bolt head?

[tangofox007]

27 mm.

It''s a little tough for the balancing disc to wobble unless the crankshaft bolt is loose. (Which is not to say that the disc is wobbling.)

[ashedd]

I will have to take another look with it running since now I have seen some drawings of all the different sections. From what I recall only the pulley wobbles. The last time it got to the point where is sounded like it was knocking. I found most of the bolts sheared off or backed out. Only one was actually semi holding the pulley one. This time it's more of a metallic tap. I only assume its the pulley area because that is where I hear it, the wobble and past issues.

27mm Thanks

[kerry]

Wasn't there an account a number of years ago of a balancer shearing at some kind of rubber joint?

[tangofox007]

Originally Posted by kerry

Wasn't there an account a number of years ago of a balancer shearing at some kind of rubber joint?

That would have to be the vibration damper, which should not affect the pulley.

[ashedd]

I found the video hidden in the sim card. I am converting to mp4 now, I hope the quality is good enough for mp4. Gimme a min

[ashedd]

It went from 172 MB's to 10 MB's
It will work for now... in the mean time I will try to upload the original, the estimate was like an hour.

http://www.youtube.com/watch?v=wshFGCThdao

[ashedd]

I think the MP4 is ok. You can hear it for sure. Looks like the whole thing is wobbling.

[tangofox007]

Originally Posted by ashedd

Looks like the whole thing is wobbling.

Yes, it does. If the pulley bolts are in fact tight, I think you need to remove the pulley and vibration damper so that you can get a good look at the balancing disc.

[kerry]

I could hear the sound but couldn't see much of a wobble. Are you sure it's coming from that location? Have you put a stethoscope on it? Could it be the vacuum pump?

[ashedd]

I will listen with a tool.. I don't have a stethoscope. Again I am only assuming the pulley cause it is clearing wobbling. I have compared it to my TD and that thing is rock solid.