Identifying Chevy engines
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==BBC external cues for 2- or 4-bolt bottom end== | ==BBC external cues for 2- or 4-bolt bottom end== | ||
While not 100%, a Mark IV BBC engine can sometimes be ID'd for being a 2- or 4-bolt bottom end by looking above the filter mount: | While not 100%, a Mark IV BBC engine can sometimes be ID'd for being a 2- or 4-bolt bottom end by looking above the filter mount: | ||
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[[File:Bbc 4-bolt vs 2-bolt fittings id.jpg|550px]] <br style="clear:both"/> | [[File:Bbc 4-bolt vs 2-bolt fittings id.jpg|550px]] <br style="clear:both"/> | ||
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| + | ==BBC 502== | ||
| + | A production Chevy 502cid block can be a Gen V or VI. It will have "8.2" cast into the block, and will have 4-bolt mains with a one piece rear main seal. | ||
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| + | A 454 bore diameter will be about 4.25". A 502 will be about 4.5". | ||
[[Category:Identification and decoding]] | [[Category:Identification and decoding]] | ||
[[Category:Engine]] | [[Category:Engine]] | ||
[[Category:GM]] | [[Category:GM]] | ||
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