Farm Equipment - WD Head

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WD Head

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=14265
Printed Date: 02 Feb 2025 at 5:08pm
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Topic: WD Head

Posted By: Osage_Orange
Subject: WD Head
Date Posted: 23 Jun 2010 at 11:24am

Are all heads for WD's interchangeable? I want to pick up a spare to rebuild in advance of overhauling the engine this fall. I called a local salvage yard and they asked for the head casting number. I cannot find one. The head is 4" tall and the engine serial # is "WD350496PA".

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Why is there never time to do it right the first time, but always time to go back and fix it?

Replies:

Posted By: CTuckerNWIL
Date Posted: 23 Jun 2010 at 1:20pm

WC's and WD's should all be the same I believe. I'm sure the WD45 head will bolt up too.

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Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF

Posted By: Osage_Orange
Date Posted: 23 Jun 2010 at 2:07pm

I'm presuming the 45 would have longer push rods (since the head is 4-1/2" tall). If so, and I were to get them also, would the 45 match bolt holes, water passages, etc.?

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Why is there never time to do it right the first time, but always time to go back and fix it?

Posted By: Good
Date Posted: 23 Jun 2010 at 2:24pm

The push rods are the same the difference is in the rocker arm stands were it's bolted to head. You will need head bolts and studs from tall head and rocker set to use one.

Posted By: Don(MO)
Date Posted: 23 Jun 2010 at 3:44pm

I'm with "Good" on the WD45 head change, The push rods are the same in a WD and the WD45. One more thing you will need is the WD45 valve cover. Don

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3 WD45's with power steering,G,D15 fork lift,D19, W-Speed Patrol, "A" Gleaner with a 330 corn head,"66" combine,roto-baler, and lots of Snap Coupler implements to make them work for their keep.

Posted By: Brian G. NY
Date Posted: 23 Jun 2010 at 7:26pm

Osage,

Your 4" head is the same as the WD-45. The "tall" (4") head was introduced on WDs with ENGINE Ser. #WD289001. The WC and early WD "short" head is 3" tall. So.......your best bet is to buy a late WD or WD-45 head to match the one you have.

No need for different rocker stands or valve cover.

Posted By: Osage_Orange
Date Posted: 23 Jun 2010 at 10:37pm

Thanks to all for the info. When it gets cooler, I'll get over the salvage yard and pick one out.

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Why is there never time to do it right the first time, but always time to go back and fix it?