Wobbly harmonic balancer

[joes68340s]

I recently purchased a 71 D100 that was converted from 6 to small block. I have noticed that at idle the balancer has a wobble. I checked for crank walk it seems good. When rotating the engine you can see it as it closes the gap with the timing marker almost touches then back to an 1/8 in gap. I have never seen this before. Could this be the balancer slip on the rubber ring.

 

[AJ/FormS]

I vote replace it before it comes off there! Cuz if it does, it's gonna do a lot of damage.
Altho, I have seen lots with minor wobbles, like 3/64 or perhaps as much as 5/64. These were on lo-po, low-rpm, engines and ran that way, for all the time I had them. My slanty still wobbles a tad

 

[Daves69]

My neighbors Lexus was sounding like he had a squealing belt for a while. He couldn't figure it out. The squeal quit when the balancer came apart.

 

[joes68340s]

I think it has slipped as the lower pulley doesn’t wobble on the solid part of the balancer.

 

[jack68gts]

If you're able to keep it wobbling, esp at higher rpm's,,,you might be able to get the wobble to stop on it own,

 

[Mopar-Man]

^^^^ whoops!

 

[jack68gts]

^^^^ whoops!

Good news was that it didnt ruin the balancer bolt

 

[rustycowll69]

Good news was that it didnt ruin the balancer bolt

where did it go, when it broke? That thing could do some damage, when it flung off!

 

[RustyRatRod]

Yeah, probably need to start doin some checkin.

 

[jack68gts]

It smoothed out those pesky sharp fins on the radiator, and played hell on the fan blade, but otherwise not bad,,,it only vibrated for a cpl seconds

 

[rustycowll69]

It smoothed out those pesky sharp fins on the radiator, and played hell on the fan blade, but otherwise not bad,,,it only vibrated for a cpl seconds

I dunno, but me thinks it could have been
much worse. You may have been "lucky", hahaha.