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Forum Rules (Click Here) -> Ontario Rodders -> Tech -> main bearing question
Post Info TOPIC: main bearing question
billyisamountain


ROCKWOOD, ONT

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main bearing question
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The main bearings on my Gen1 5.7L SBC are stamped with .0006. What does that mean?

JG



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Ground Pounder


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factory under sized crank was used...Bearing was over sized by .0006. for proper oil clearance

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billyisamountain


ROCKWOOD, ONT

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thank you


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billyisamountain


ROCKWOOD, ONT

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as a follow up. I found that bearings 2,3,4 where marked .0006 but 1 and 5 where not.

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Petebil


ONTARIO

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This is common practice for mass produced engines. The same process is used for piston to bore sizes. This allows the manufacturer to be a bit sloppy on their machining tolerances , but retain proper oil clearances.

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