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426 head removal

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=163983
Printed Date: 05 Apr 2026 at 12:53pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com


Topic: 426 head removal
Posted By: Kevin210
Subject: 426 head removal
Date Posted: 29 Aug 2019 at 5:57pm
OK guys I need my memory freshened up some on
removing the head on a 3700 motor.
I replaced a couple of sleeves and pistons back in the
90's but that's been a while.
What sequence do you use to remove the head bolts for example.
Will a 3500 head and a 3700 head both fit on the same block.
And what about swapping the front covers also,will the 3500 water pump
circulate enough coolant to keep the 3700 cool or would I need to use
the 3700 water pump.

Thanks guys.



Replies:
Posted By: DougS
Date Posted: 29 Aug 2019 at 7:00pm
Usually you loosen/remove the bolts is the opposite way you install them.


Posted By: SteveM C/IL
Date Posted: 30 Aug 2019 at 11:06am
i put a 7040 head on my 220 30yrs ago. Direct fit



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