Re: V8 Balancer Differences

Posted by PackardV8 On 2007/3/15 20:38:28

The drilled balance holes can vary form balancer to balancer. The AC pulley is CI for 55 and cast Al. for 56. My Exec has cast Al. AC pulley.
Eric, is the bad balancer a loose fit on the crank???? If so then that would cause the problem. It should be a light to medium press fit and require assembly by DRAWING it into place with a long bolt (3/4-20 ???). i believe the manual details the installation.

Note: Field service technicians will often 'polish' or hone out the bore of the balancers to make them easy and fast to install. This might be what happened to your pulley that sheared the key. Some mechanics will drive them on with a hammer which is not an all bad practice depending on how tight the fit is.
LOOSEN the timing chain cover bolts to allow the seal to centralize (also covered in manual).