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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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GM 4-53 Oliver 1950and 1900

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Marty Whitworth

03-01-2006 17:48:41




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Anyone with info on finding rebuild kits for the GM 4-53 motors, found a parts outfit,they want toknow the compression, any ideas would be helpful. Thanks,marty




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AEV

03-03-2006 20:32:55




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 Re: GM 4-53 Oliver 1950and 1900 in reply to Marty Whitworth, 03-01-2006 17:48:41  
If the screamin "D" is that far gone I"d hate to see the rest of the tractor. I"ve got a 1950 FWD and the 4-53 is the only thing thats hasn"t had a wrench put to it in its 40 years of existence!
Man that is one good tractor. Ranks right up there with the 4020 JD.



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J. Schwiebert

03-01-2006 18:21:27




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 Re: GM 4-53 Oliver 1950and 1900 in reply to Marty Whitworth, 03-01-2006 17:48:41  
The original 1900 A series with the 4-53 were S series engines with 17:1 compression the later N series as used in B & C series as well as the 1950 were N series engines with 21 to 1 compression. Larry is correct if price is an issue you will need to price in the aftermarket. Genuine G-M kits are expensive. You will also need the numbers Larry talks about. If you have an original 1900 and it has been converted to a 4 valve head it will be an N series. There used to be a gauge you stuck in the piston crown to double check the compression ratio. Questions?

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ejr-IA.

03-01-2006 18:04:35




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 Re: GM 4-53 Oliver 1950and 1900 in reply to Marty Whitworth, 03-01-2006 17:48:41  
Clevite catalog on the 4-53 states a 17 to 1 c.r.



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larry h

03-01-2006 18:01:27




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 Re: GM 4-53 Oliver 1950and 1900 in reply to Marty Whitworth, 03-01-2006 17:48:41  
there are several parts outfits with them you need the gm no off valve cover then go to a truck parts place a kit should be less than 900



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