Hi.

My car has some vibration at 1500-3000 rpm. At idle the engine is shaking pretty much from side to side. The vibrations are there also at park at the given rpm, so its probably not the drivetrain. The type of vibrations are unmistakable, so it shouldnt be so difficult to find the reason, but I havent found it yet. There was also some vibratin on the old 352, but that was another "kind" of vibrations

Here is a little story what changes that has been done with my Galaxie 

Last winter, the upper part of the 390 in my 63 Galaxie was disassembled. Lifters, pushrodt valvespring and seals were replaced. Summer 2015, the enging was ticking loud, but now the ticking is gone. Also a new harmonic damper (powerforce) and a 600 cfe summit racing carb were installed. The old damper was not good

2-3 Years ago the car got the 352/Cruisomatic replaced with a 390/C6 from a 67 Mustang. The crossmember had to be removed rearvard some inches using steelplates on each side using this sketch  found on another forum. The bolt holes for the C6 on the tranny mount had to be enlarged sideways 

The engine has FPA Tri-Y headers and new dual 2.5" exhaust, had to grind of a small metalpiece of the chassis to avoid one of the headers to touch the chassis, which could cause some vibrations


But some strong vibrations are still there, maybe a little bit different than last year

Could it be unbalanced fan, worn timing chain or maybe  something wrong with the engine/tranny mounts?

Som hints about what the reason could be would be great

Last edited by 1976kjell (August 20, 2016 6:39 am)