Quote:
Originally Posted by Onestone
Does anyone have a hint where I can get the main bearings for the crankshaft in STD size?
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OldsObsolete has a listing for a set of Moraine 400 (considered an upgrade, used in the GMC truck versions of the 287/317 Pontiac V8) in STD size, GM part number 2336025.
Listing is here:
https://oldsobsolete.com/products-pa...&gsc.q=2336025
But be careful. The picture shows two sets of bearings that go in any of the front 3 positions, one set of thrust bearings and no rear main bearing. Check with them "Is this a full set?"
Pontiac in their evil ways (at least in my 1960 Pontiac Master Parts Catalog) lists separate part numbers for each pair of bearing halves. In standard sizes the front three are part number 522728, thrust bearing is 522732 and the rear main is 520237. Bearings were also listed in .001" and .002" undersize.
OldsObsolete also has a listing for a single set (last one in stock) 522728.
The Pontiac book doesn't list any other sizes. GMC book lists under sizes of .010", .020", .030" and .040".
If the standard size parts don't pan out let me know and I'll post some more of the GMC numbers if you have to cut the crank.
I'd get a blessing from an older Pontiac motor guy (Jack Gifford comes to mind) before I mixed Moraine 400 and the other bearings (I think they were a Clevite part) on the same crankshaft.