[blk05coupe]

The belt has come off three times now any ideas what to look for. The alignment looks good and everything seems tight I can’t figure out how it walks thru the main belt without knocking it off.

 

[69MyWay]

Have you ever had the front balancer pulley changed or pulled off?

 

[Whiterock1]

Sounds like the idler pulley isn't putting enough tension on it. They should be adjustable, so I'd look there first and tighten it up--not a lot at first, but maybe take a 1/8" out of the slack. It should be spring loaded. :thumbsup:

 

[blk05coupe]

the balancer was removed with the heads and cam were put on, it has a little wobble but it always has and this issue just started i 'll check it out.

the idler pulley is hard mounted with no adjustment it's just spring loaded, it might be worn out but the car only has 17K on it.

thanks

 

[69MyWay]

I bet your main crank pulley is loose.

 

[blk05coupe]

I bet your main crank pulley is loose.

holy ****:surprised .....i hope not do they have a history of this.

 

[69MyWay]

holy ****:surprised .....i hope not do they have a history of this.

Yep - especially if have had it removed for the engine mods. There is a tedeous process to reinstall with specific torque and it must use a new bolt. The EARLY 05 models were spinning pulleys off left and right for some reason causing belts to jump.