Broke my sc crank pulley

[Black01Vert]

No idea how or why this happened..

Just done with the termi swap on my mach and when I started the car up, everything was fine till 1 min later, I noticed the sc belt was not moving. The harmonic balancer spins just fine but not the sc pulley.

Looks like it broke around the 14mm Allen bolt and I can easily spin it with my hand.

Anybody have this happen to them? The car was idling, didn't even rev it.

 

[Black01Vert]

Stock belt, stock idlers, and stock eaton pulley

 

[DannyBoy08]

Did one of the stock idler bearings seize up? I would check each to see how they spin. I would imagine something drastic had to happen to allow a bolt to shear.

 

[Black01Vert]

Did one of the stock idler bearings seize up? I would check each to see how they spin. I would imagine something drastic had to happen to allow a bolt to shear.

Don't think so, I was turning the belt with my hand and everything seemed fine, I'll check them though..

What I did notice at first was that the belt was off one tooth inward on the crank pulley, and the eaton pulley got a little hot to the touch after running for 2 min.. Pulley not aligned?

 

[Black93Fox]

I wouldn't think a eaton would get that hot so quick. Sounds like something else may have been a issue. How much tension was on the belt?

 

[MalcolmV8]

You mentioned a fresh motor swap/build. Did the Eaton have oil in it?

 

[Black01Vert]

You mentioned a fresh motor swap/build. Did the Eaton have oil in it?

Did not check,Eaton came off a running car so I didn't even think of that

 

[stagedz]

Did not check,Eaton came off a running car so I didn't even think of that

Hope this isn't the case...however if you need a "new" eaton I have a Steg Stage III crinkle painted black I'll sell ya

 

[aarons04cobra]

you didn't check the oil in the blower before you installed and started it???? sounds like you are going to be buying a new s/c soon. sorry man

 

[Tractionless1]

Did not check,Eaton came off a running car so I didn't even think of that

Hope it's not the case but nonetheless NEVER trust anyone but yourself! Double check EVERYTHING, even parts that come back from a machine shop.

 

[mhinchley]

Oil was immediately my first thought too. Most drain the oil before shipping.

Also could possibly be caused from hitting the snout with a hammer or dropping it, so that it pushes the snout shaft further into the case, which would also cause an alignment issue. But I have burnt up a rib or two off a belt, by just not getting it (the belt) installed just right. Just did it a couple days ago in fact.