What caused this?

[VintageMusclecar]

Please, don't use a hammer to pound a harmonic damper in place.

I've seen a damper split right down the snout while being pounded in place with a 5 lb mallet and a 2X4 block of wood.

If you plan on doing engine work with any frequency at all, a balancer puller/installation tool is well worth the investment.



Before someone thinks about installing a damper with a hammer & a block of wood, they should take into consideration how much damage a fragged damper could do if it decided to let go at 7K+ rpm.

Eric