D14/D15 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=134467
Printed Date: 30 Oct 2025 at 5:16pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: D14/D15 Heads
Posted By: AJ
Subject: D14/D15 Heads
Date Posted: 30 Jan 2017 at 8:19pm
Is there a difference between the head on them like a different casting number or valve size?
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Can't fix stupid
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Replies:
Posted By: Calvin Schmidt
Date Posted: 30 Jan 2017 at 10:03pm
I just put a head from a 138 cu. in. engine (early D-10/12) on a D-14 149 cu.in. engine with no problems. Don't know about the 149 to 160.
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Nothing is impossible if it is properly financed
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Posted By: jaybmiller
Date Posted: 31 Jan 2017 at 6:29am
gee Calvin you could have put a D-14 head on that D-14...I got one sitting here ,looking for new home....
Jay
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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Posted By: PaulB
Date Posted: 31 Jan 2017 at 1:48pm
138 & 149 heads are interchangeable as mentioned. You can
put either of those heads on a 160 if you drill out the head bolt holes. 138 &149 have 7/16" bolts and the 160 has 1/2" bolts. Also the 160 head has a spot to mount the temperature sensor up front in the thermostat pot to get a true temperature reading instead of back over top of the rear exhaust valve where the reading will always be about 20-30 degrees hotter.
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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