1969 American Motors AMX
I purchased a brand new motor and had it installed in my AMX w/ a 650 demon carb. This motor has as approximately 20-30 miles on it after engine was installed. Engine had some blue smoke coming primarily out of passenger side exhaust at first. The smoke was light to non-existant when car was started, and got progressively worse the longer the car was running - after driving for 3-5 minutes, the smoke would envelop the whole road. Smoke also got worse as a few more miles were put on the engine. Engine started fine and idled fine - no problems when stopped at a light for a few minutes. Oil pressure fluctuated between maybe 35 psi to 90 psi while driving (to the best of my memory).
Brought the engine in to be looked at. I’ve attached pictures - the ones in the engine were taken w/ a scope.
Found the following:
Oil extremely fouled and smells like gasoline.
#8 spark plug gunked up and black
#5 spark plug black (across from 8)
Ceramic burned of #5 header runner
no oil leaking past intake manifold gaskets
Fuel (and maybe oil?) on top of intake valve, and no carbon deposits
Fuel (and maybe oil?) on top of piston
vertical scoring on top of cylinder wall
PCV valve connected to intake manifold, going directly to #5 and #8 - not sure if this is a problem or not.
What I’m trying to figure out, is this a problem with the motor, or a problem with the installation?
What do you think?