How do I identify 455 engine? - Oldsmobile Forum - Oldsmobile Enthusiasts Forums

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Old 06-18-2009, 02:08 PM
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Join Date: Jun 2009
Posts: 2
Default How do I identify 455 engine?

I have a 455 that supposedly came out of a 1970 442 Cutlass.
I want to sell the engine, got laid off and I need money.
My question is, how I identify the year and type of the engine without
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Old 06-29-2009, 02:16 AM
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Join Date: Jan 2007
Location: United States
Posts: 369

You can verify the year by looking on a machined pad on the left side on the engine. It is on the block towards the fron just under the head where a large letter E will be cast into the head.
The numbers stamped on the machined pad should read something like 30MXXXXXX
3 = Oldsmobile
0 = 1970
XXXXXX = the last 6 of the VIN of the car it came out of.

455's will be stamped with 8-6 for the second number. Production was from 1968 - 1976.

There will aslo be a set of numbers cast into the block on a shelf just behind the water pump nest to the oil fill tube.
They will be 396021 F.

Good luck with the sale.
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