| Diagram | Fig. 3 — CYLINDER BLOCK – PISTONS – CRANKSHAFT · ref 16 |
| Subsystem | engine bottom |
| Listed in parts books | 1973 |
MAIN BRG SET (4).040
Main bearing set ground .040 oversize for a crankshaft that's already been machined to that size.
70-9030 is a main bearing set listed at .040 oversize, meaning it's ground for a crankshaft that's already been machined .040 over standard. This is a bottom-end part, the bearings that carry the crankshaft in the cases, and a rebuild item you order when the crank has already been reground to this size, not a stock-size replacement.
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Our catalog record on this one is thin beyond the description itself, so we can't tell you which engine family or year range it was cataloged against from what's in front of us. If you're rebuilding a motor and know your crank has been reground .040 over, this is the number to ask about, but call or give us the crank's actual measured size before you order so we can confirm it's the right set for your case.
Sorry if we got something wrong here. If you think this information isn't correct, .