Identifying Chevy engines
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==Block casting numbers and codes== | ==Block casting numbers and codes== | ||
[[File:S-bbc block id.jpg|thumb|500px|Locations of Chevy V8 block ID numbers and codes]] | [[File:S-bbc block id.jpg|thumb|500px|Locations of Chevy V8 block ID numbers and codes]] | ||
| − | One of the easiest way to identify a Chevrolet engine is by the casting number (c/n) that is cast into the castings (not stamped). [[Chevy engine casting numbers]] has several sites that | + | One of the easiest way to identify a Chevrolet engine is by the casting number (c/n) that is ''cast'' into the castings (not stamped). '''[[Chevy engine casting numbers]]''' has additional info including links to several sites that have casting numbers broken down to application, etc. |
| − | It is common to use just the last three numbers of the c/n when dealing with casting numbers, i.e. block c/n 10243880 would be called an "880" block. Usually the last three numbers aren't repeated but there are cases like the SBC head c/n 462 that- for some unknown reason- was reused 5 times! Fortunately this is rare. | + | The Chevy V8 block casting number is generally atop the transmission mounting area of the block. The date code will usually be found in the same area, sometimes on the opposite side from the casting number, but not always. |
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| + | {{Note1}}It is common practice to use just the last three numbers of the c/n when dealing with casting numbers, i.e. block c/n 10243880 would be called an "880" block. Usually the last three numbers aren't repeated, but there are cases like the SBC head c/n '''''462''''' that- for some unknown reason- was reused ''5'' times! Fortunately this is rare. | ||
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Suffix codes are stamped into a small boss on the front passenger side of the block where the head and block meet. There will sometimes be two lines of numbers and letters, later engines had just one line of numbers and letters. | Suffix codes are stamped into a small boss on the front passenger side of the block where the head and block meet. There will sometimes be two lines of numbers and letters, later engines had just one line of numbers and letters. | ||
| − | Small block Chevy engines used different size pads for the engine suffix/partial VIN. Mid '70s-up blocks use the short, fat pad (top). Early engines use the middle pad. Blocks from the '60s through the mid '70s use the bottom pad. | + | Small block Chevy engines used different size pads for the engine suffix/partial VIN. Mid '70s-up blocks use the short, fat pad (top example in the picture below). Early engines use the middle pad. Blocks from the '60s through the mid '70s use the bottom pad. |
[[File:Suffix pads.jpg]] | [[File:Suffix pads.jpg]] | ||
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These flat tappet blocks '''''may''''' have the provisions for a roller cam (i.e. bosses present and drilled/tapped for the spider and for the cam plate, etc.), but also may '''not''' be equipped with the drilled and threaded bosses needed to use a factory roller valve train. In any event, these blocks originally had a flat tappet cam and non-roller lifters, no spider, and no cam thrust plate. These blocks are fine if you don't care about the roller cam. | These flat tappet blocks '''''may''''' have the provisions for a roller cam (i.e. bosses present and drilled/tapped for the spider and for the cam plate, etc.), but also may '''not''' be equipped with the drilled and threaded bosses needed to use a factory roller valve train. In any event, these blocks originally had a flat tappet cam and non-roller lifters, no spider, and no cam thrust plate. These blocks are fine if you don't care about the roller cam. | ||
| − | + | {{!}} There is a flat tappet block and a roller block with casting numbers that ''both'' end in '''148'''. '''14101148''' is a flat tappet truck block, '''14011148''' is a roller provisioned block. | |
===Vortec block cylinders=== | ===Vortec block cylinders=== | ||
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