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Author Topic:   Emergency.....rear main situation
Dirt Newbie

Total posts: 2
posted July 03, 2000 05:53 PM
So far this season two of our three 406s have
had the oil pump break in two in the center of the neck and the rear main cap split in across the center.
One engine had a Melling pump, the other broke last night with a pump from Moroso. Both are wet sump engines with G.M. cranks, Childs & Albert rods, Ross flat top pistons and Vortec heads. The better one is 12.9:1 and turns 6500 the back up motor is 12.5:1 and runs best at 6000. Both engines over the last couple years have won many races and track championships all the sudden two breakages like this inside of 4 weeks of each other.

Dirt Administrator

Total posts: 3279
posted July 03, 2000 11:34 PM UIN: 16262997
I would look at your tranny, sounds like something might be out of alignment or out of wack somewhere back there. If it is, then it will hammer the rear main.

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