| Re: [GMCnet] Olds 455 donor engine [message #369910 is a reply to message #369907] |
Thu, 09 June 2022 13:35  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
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Keith,
There are three Olds 455 crankshafts.
One is a forged steel and it looks very different than the cast cranks. Those are valuable as the cast do not hold up to high horsepower.
Of the two that are cast, the gray iron are not worth much and do not wear well, but if there is a N cast into one of the throws (front iirc) that is a nodular (regularly referred to as noodle iron) crank and they are almost as good as steel.
That plug to lube the distributor gear is a 5/16 square. If you have a friend with a mill, he can make the tool out of a bolt in a heart beat. The next best answer it to find a 5/16 lathe tool bit and use that and a wrench. Push comes to shove, I can mail you the one I made.
The C cylinder heads did not have hardened valve seats, but they are valued for their large ports. These will wear badly with modern fuels. Hardened seats didn't start until G, but hardened seats can be put in but must be Olds and not Chevy seat as those are thicker and cutting for them will hit the water jacket. (That head is scrap.) The also don't have the deeper spring pockets to accommodate the rotators. I do not know if these can be machine in those castings.
No matter how bad the bores look, try to have someone clean one and measure one. I am told that piston up to 0.060 over are available.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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