Eating distributor gears
I assembled the engine 2 years ago, and finally got it running, and drove it this past year. I trailered it up to Tn and drove it around the PITS show for 4 days, trailered it back home, and drove it a little down here.
After replacing my over ported head, but before starting it, I noticed that the distributor center shaft moved too much. I pulled the distributor and noticed that the teeth on the gear are worn, the edges of the teeth are worn sharp.
I replace the gear, oil, filter, and within 30 minutes of the engine running, driving the car, it has destroyed the gear on the distributor. One section of teeth are so worn down that the distributor is no longer turning.
I replace the oil pump, pickup, replace the gear, oil, filter, and within 1 min, I see it marring the new gear, complete contact on one side of the tooth edge.
I replace the distributor with a fairly well used Mallory, and after about 15 min of trying to get the engine to run (it's a dual point and not adjusted well) I stop and pull the distributor and see that it is starting to scratch the same edge of the distributor gear.
This is a Comp Cam Hydraulic lifter cam. Comp Cam recommends either they steel or composite gear. This is the steel gear that I have been replacing with. The oil is 10w-30. Before installing the distributor I lube the gear, and when I pull it out most of the lube is washed off and the gear has engine oil on it.
The first oil pump was a Melling standard, the 2nd is a TRW HV. The pump shaft has play, it is not binding.
The only other thing I can think of is somehow the gear on the cam has gone bad and is eating into the distributor gears. Any though on what I might be missing?
Last edited by 69GT350H; 05-24-2019 at 06:13 PM.