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Thrust
Bearing Modification
For Longer
Life
Below are pictures showing how to increase the life
of your thrust bearing for Pontiacs.
With higher stall converters and increased line
pressure of transmission shift kits, you have more forward thrust loaded on
this bearing. This modification, however, is recommended for all High
performance engines.
I take the thrust bearing and lay it on a belt sander
at a 30 degree angle and grind till the bevel edge reaches the corner of the
main shell. Then take a flat file and clean up the flashing with a slight
bevel to the edge.
*** Main Bearing Pontiac mod info:
***
I elongate the oil feed holes to match the angled feed main hole in the
block. Usually I only elongate about the size of the original hole in #2 and
#4 only. This seems to be the Load & critical areas in Pontiac performance
and trouble. The rear main bearing I don't touch as I feel the wider area of
the bearing is sufficient to hold oil, plus being the first fed from the
pump. I also elongate the front feed hole half the size of the original hole
for hydraulic cam engines to allow sufficient supply to the lifter fed
through #1 main on the other side without sacrificing oil to the main and #2
rod.
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