Re: Rear main oil leak >
I added about a half quart of oil to the valve chamber via the hole for the distributor shaft. 15 minutes later, there was a significant puddle of oil under the bell housing. "End Quote"
That is normal.
Oil comes through the shims, top and bottom of the main bolt, uneven cap and block mating surface, shaft clearance, thrust clearance, oil tube screwed in to far, with out cleaning out with a 3/8's bit.
When you pour a Model A rear cap, the little soft plug should be pulled to make sure that the passage is all clear.
With a half plugged, passage, with Babbitt, you would never know it by blowing 175 pounds of air through it.
Herm.
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