What are the signs of a blown harmonic balancer seal?
oil leaking from the front of the engine. harmonic balancer
doesnt have a seal it does however have a rubber bushing in it this
is to take out the virations caused by engine running,hence the
name harmonic balancer . you may however have a bad front
crankshaft seal that is bad this will leak oil at bottom front of
engine so if you are talking bout rubber in harmonic balancer, you
will get ruff vibrations from engine when running, also can throw
the timing out
you will have a MAJOR oil leak.....