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Old 04-22-2010, 06:35 PM
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Please Help

Hello guys!!! I have a Oldsmobile 455 motor that I would like to get more information about it. The numbers behind the water pump are 396021 F. I have more numbers if they will be helpful.
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Old 04-22-2010, 06:57 PM
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Pulled this from another forum...

http://www.oldspower.com/vb/showthread.php?t=21842

Quote:
396021F....all you need to know.. thats the casting number for a 455 block

i memorized it lol.. but if you wanted better info...

OLDS 1968-78 350 5.7 4.057 V-8 7/16" Head Bolts Engine Casting: 395558
OLDS 1977-80 350 5.7 4.057 V-8 1/2" Head Bolts Engine Casting: 557752-3B 554964-3A
OLDS DIESEL 1977-80 350 5.7 4.057 V-8 Diesel, D Engine Flat Tappets Engine Casting: 4468
OLDS DIESEL 1978-82 350 5.7 4.057 V-8 Diesel, DX Engine Roller Tappets Engine Casting: 7582
OLDS 1977-79 403 6.6 4.351 V-8 Specify With or W/O Smog Engine Casting: 557265-4B 554990
OLDS 1968-76 455 7.5 4.125 V-8 Engine Casting: 396021F 231788L
OLDS 1968-76 455 7.5 4.125 V-8 Marine, High Comp. Piston Engine Casting: 396021F 231788L
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Old 04-22-2010, 08:14 PM
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Rookie motor guy need more help!

Thanks for the information. I'm trying to figure out if this motor is a w30 or w40... Is it another section on the block that might provide me with that information? I'm getting ready to rebuild it and I wanted to know more about the motor before I got started.

Last edited by Maalyg; 04-24-2010 at 09:16 AM.
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Old 04-24-2010, 06:39 PM
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Quote:
Originally Posted by Maalyg
Thanks for the information. I'm trying to figure out if this motor is a w30 or w40... Is it another section on the block that might provide me with that information? I'm getting ready to rebuild it and I wanted to know more about the motor before I got started.
If you have to ask if it's a W-30 motor, then it almost certainly is not. There is no such thing as a 455 W-40.

Depending on the year, the W-30 motors had unique heads, valves, cams, and intake manifolds. All of those parts can be bolted onto any 455 block. There are no numbers anywhere on the motor that will "prove" is it a W-30. Heck, prior to the 1972 model year, there was nothing anywhere on the car that would prove it. The only proof is if you have a factory build sheet that shows the W-30 option and that matches the VIN derivative on the block. And before you ask, no, these build sheets are not available from any source, so unless the build sheet can be found inside the car (and there's no guarantee of that) then there is no way to prove it.
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Old 04-25-2010, 05:00 PM
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The motor was taken out of a 1970 442 according to the guy I bought the motor from and was trying to see if he was being honest because I never saw the car. I got a really good price on it so I bought it anyway... Thanks a lot for your help and I'm sure I'll post more questions once I get started with changing it over to performance parts...
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