Chevy engine decoding
- Thread starter Doug Chahoy
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The block # is cast on the driver side rear behind the head....hope this pic helps.
Dang, hard to read...but look for where it says GM and the block id # is below that.
Dang, hard to read...but look for where it says GM and the block id # is below that.
Opie Knievel
Rum Fueled Midnight Mechanic and Moderator
Injectedcutty is right about the casting number. If you want more specific info on your engine, you'll have to check the suffix codes on the front of the engine. Right in front of the right head.
http://www.nastyz28.com/chevy-engine-code-stampings.php
http://www.chevy-camaro.com/chevy-camaro-chevy-engine-suffix-codes.asp?group=12
http://chevellestuff.net/qd/engine/engine_codes.htm
http://www.nastyz28.com/chevy-engine-code-stampings.php
http://www.chevy-camaro.com/chevy-camaro-chevy-engine-suffix-codes.asp?group=12
http://chevellestuff.net/qd/engine/engine_codes.htm
The passenger front of the block has a flat pad by the water pump that has a VIN & ID code stamped there.
If the numbers are still there it tells you the block hasn't been decked.
Or it's a restamp, though not as likely on a later model car as it would be on a "collector car"..
Only sure way to tell if it's been decked (by visual inspection) is looking for the broach marks. OE broaching is linear, machine shops deck with a rotary cutter.
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