Harmonic Balancer

[Russell Petry]

Hi, everyone!

I am doing quite a bit of work on my 77 NYB, including changing the water pump, changing the AC to a sanden compressor, and also adding EFI to it. Since I will have fairly clean access to it, should I change out the harmonic balancer while I am down there? It is the original one, so was thinking it would be easier to change it out then. Any thought on whether or not I should?

 

[Big_John]

Unless you have some sort of problem, I wouldn't.

On some, the rubber does get old and the outer ring can slip, but unless that's happened, why bother. You might have a hard time finding the correct "external balance" balancer to match the cast crank motor anyway.

 

[volksworld]

mine had an oil leak out the front seal so the rubber ring had softened up and was hanging out the back of the damper by 1/8 inch or so...so i replaced it...if everythings dry i think i'd leave it alone...440 source has one for a cast crank 440 (that i used) but i don't know if the 400 would use the same weight...when i checked it was off by 2 degrees but some here said that could have been the keyway in the crank and not necessarily the damper