Farm Equipment - WC, WD , and WD45 Heads ????

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WC, WD , and WD45 Heads ????

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=42851
Printed Date: 29 Aug 2025 at 10:10pm
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Topic: WC, WD , and WD45 Heads ????

Posted By: Teddy (punchie)
Subject: WC, WD , and WD45 Heads ????
Date Posted: 28 Dec 2011 at 11:10am

OK what the differencein the heads, to the running of the tractor?

Cooler, ported different?

Why the taller WD45's heads ?

Gaskets, Valve Size, Guides, and the Push Rods are the same? right?

Thanks !! Teddy

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Ac D-19, a Number of WD's, One WD45, Two 444 balers, Ac plows and etc.

Replies:

Posted By: AaronSEIA
Date Posted: 28 Dec 2011 at 11:53am

The 45 head has more cooling and the 45 head gets the spark plug closer to the center of the combustion chamber. Other than that, I'm not real sure.

AaronSEIA

Posted By: LouSWPA
Date Posted: 29 Dec 2011 at 3:15pm

Teddy, that's a good question.....I been told not much difference, performance wise

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Posted By: TedBuiskerN.IL.
Date Posted: 29 Dec 2011 at 4:34pm

The Tall head, introduced on the WD in mid 51 and carried over to the WD45, moved the plug toward the center of the combustion chamber and eliminated the little pocket the plugs sat up in before. It unshrouded the plug for less fouling and increased compression just a little.

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