Anybody out there ever had this happen to their distributor It fits into place perfectly doesn't seem to be binding when turned yet after driving it for 5 min it wears the teeth so bad it jumps out of time and starts backfiring through the carb has happened to two distributors now could it be a compatibility problem between cam and distributor gearing . Any remedies ?

 

You probably need to shim it up. This usually happens on an engine that has been rebuilt, and maybe decked or the heads shaved so the dist. is now seating lower. You are lucky you haven't ruined the cam. I am not sure of the exact procedure for determining how much to shim it. If some one here doesn't jump in with the info you may want to repost this thread in the engine specific forum.

 

I had a 351 C do the same thing. I was told it could be the oil pump or the cam thrust.

Good Luck

 

do you have a new intake manifold? I've heard of them being machined with the distributor slightly off causing wear

 

I did change the intake manifold from a 2v to a 4v but it was off another 390 and the dist was fine on that one

 

You have opened up a whole can of worms. I have never experienced this problem myself but the length of the distributor seating face to the gear is critical. Also some cams require a certain type of distributor gear material.

 

I'm pretty new to the 67 352 world, but one of the first things I learned while replacing my cam was that the spacer in front of the thrust plate is an original motor part. When these engines are rebuilt with new timing gears, the spacer is built on to the new timing gear. when both the spacer and the new timing gear are installed together, the cam moves back and forth, the lifters slide partially off of the cam, and the distributor gears are destroyed, also the cam gears are chewed off. also the oil pump shaft moves and can possibly seize the pump. it all happens together. hope this helps

 

nailed it stgdive removed motor and that is exactly what happened thanks for the input and anyone else reading this now you know the rest of the story !

 

Glad i could help. i've recently completed the last tweaking on my old tank, I finally figured out the carb ajusting and provided nothing else breaks from old age, all I need to do now is drive it.
Now I can return to first bad habit.
http://home.comcast.net/~stgdive/livetoride.html