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Allis Chalmers Discussion Forum

1948 wd engine

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Author  [Modern View]

12-30-2019 05:45:41

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Hey guys I'm new here. I have a 48 WD or I think it's a 48. It has a wd 201 block but the valve cover says power crater so I don't know if it simply has the wrong valve cover or it was rebuilt with wd45 internals at some point. How could I tell? Also I think it's the 3 inch head with studs and nuts not bolts, but it seems I can only find bolts for the later 4 inch head (engine 289000 & up) mine is WD205326ga. I'm gonna have to pull the head off bcuz i think it is cracked but I'll need the right studs. Any help would be great

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12-30-2019 12:44:08

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 Re: 1948 wd engine in reply to Michael48WD, 12-30-2019 05:45:41  
Engines with the tall cylinder head had 5 studs and 10 ?? bolts. When you get the head off, measure the bore (4 inch or 4 1/8") and stroke (4 inch or 4 1/2") to determine what engine it really is. Good luck on the cracked head. I've never seen one crack (yet).

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Aaron SEIA

12-30-2019 06:58:12

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 Re: 1948 wd engine in reply to Michael48WD, 12-30-2019 05:45:41  
You can reuse the studs. 3" head makes it a WD. Hard telling whats been put in it. I've taken apart 3 201 engines that have had a 45 crank and M&W pistons in them. I don't think Allis ever used a head bolt. It was always studs and nuts.


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12-31-2019 16:38:44

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 Re: 1948 wd engine in reply to Aaron SEIA, 12-30-2019 06:58:12  
Well I pulled it today and it's not cracked. Just a bad head gasket leaking in cylinder 1. Also a bad spot on the cylinder wall so time for a sleeve and piston kit.

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