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Allis Chalmers Discussion Forum

WD Head vs WD-45 Head

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Author  [Modern View]

01-01-2018 04:37:21

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OK here's my situation, I'm rebuilding the engine in my dad's WD, I did some research and talked to some people and decided to put a 45 rebuild kit in it.Everyone I talked to said all I would need to do is get a 45 crankshaft, the heads are the same. So I ended up with a 45 parts tractor the other day and looking it over I noticed the head is quite a bit different.(size wise) So what is the difference? Is it just the the water jackets are bigger?

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Aaron SEIA

01-01-2018 13:48:22

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 Re: WD Head vs WD-45 Head in reply to jerkus730, 01-01-2018 04:37:21  
Nope, no issues at all doing that.


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01-01-2018 09:05:06

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 Re: WD Head vs WD-45 Head in reply to jerkus730, 01-01-2018 04:37:21  
Quoting Removed, click Modern View to see I have a WD head o. A d17 block in a WD. No problems. Used it for mowing and tillage.

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Aaron SEIA

01-01-2018 04:52:48

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 Re: WD Head vs WD-45 Head in reply to jerkus730, 01-01-2018 04:37:21  
The 45 head is taller. That centers the plug a bit better in the hole. It probably flows coolant better as well. From what I understand from the pulling folks, they do not flow air/exhaust any better. If you use the 45 head, you do not need to change the push rods but you DO need the rocker stands from the 45 head and obviously the head studs.


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01-01-2018 04:59:11

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 Re: WD Head vs WD-45 Head in reply to Aaron SEIA, 01-01-2018 04:52:48  
OK so if I use my WD head I wonít have any problems? That would be ideal for me since I just got it back from the machine shop and itís ready to be put on

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