D17 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=42345
Printed Date: 30 Aug 2025 at 12:10pm Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: D17 Head Removal
Posted By: Charlie175
Subject: D17 Head Removal
Date Posted: 19 Dec 2011 at 6:46am
&#$#%! thing is stuck. I have all the bolts out but the sucker won't budge. Maybe I am using kids gloves on it but I have tapped all around it with a wood block and hammer and still no joy.
What is the secret?
------------- Charlie
'48 B, '51 CA, '56 WD45 '61 D17, '63 D12, '65 D10 , '68 One-Ninety XTD
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Replies:
Posted By: john(MI)
Date Posted: 19 Dec 2011 at 7:07am
There are bolts on the top left holding on another part, can't remember what it was, water jacket? They need to come out as well. Been there!
------------- D14, D17, 5020, 612H, CASE 446
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Posted By: Matt MN
Date Posted: 19 Dec 2011 at 7:23am
Make sure you have all 15 (I believe) nuts removed, sometimes they like to get rusted along the head studs, put some penetrating oil along them, Also can use a putty knife and pound in along the head gasket area
------------- Unless your are the lead horse the scenery never changes!!
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Posted By: Don(MO)
Date Posted: 19 Dec 2011 at 8:16am
Like John and Matt said remove all the bolts and nuts off, there are four on the top left side and three 3/8" nuts on the top right side too.
I drive a putty knife through the center of the old head gasket and have used a chain on top of head and put some lite pressure on the head too.
Don
------------- 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.
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Posted By: Gatz in NE
Date Posted: 19 Dec 2011 at 11:16am
I've done what Don suggests, too....but have used a chisel and a 2# hammer. Alternate side to side, front to rear.
(it does make a small mark or ding at the edges, but nothing serious)
Good heavy whacks, with some pull from above with a hoist or similar, it should pop loose.
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Posted By: Charlie175
Date Posted: 19 Dec 2011 at 11:47am
The head bolts were rusty, I will see what pops loose tonight! Thanks for the help
------------- Charlie
'48 B, '51 CA, '56 WD45 '61 D17, '63 D12, '65 D10 , '68 One-Ninety XTD
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Posted By: B26240
Date Posted: 19 Dec 2011 at 1:46pm
I use Don's method but with old screwdriver (sharpened) like said make sure you are in middle of gasket, someone may hay "glued" it on!
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Posted By: j.w.freck
Date Posted: 19 Dec 2011 at 8:49pm
had one of my 45 diesels that was stuck.had to put a small hydraulic jack between the frame and the air cell to get it freed up...
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Posted By: Burgie
Date Posted: 20 Dec 2011 at 6:02am
Take the studs out where the thermostat housing is. I had to heat the head to get those out. When I screwed the last one out the head came up with it.
------------- "Burgie"
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Posted By: Jordan(OH)
Date Posted: 20 Dec 2011 at 7:51am
Put spark plugs in and crank engine. Use compression to break it loose.
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