Farm Equipment - any H IH gurus

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any H IH gurus

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=160151
Printed Date: 15 Apr 2026 at 7:37am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: any H IH gurus

Posted By: tbran
Subject: any H IH gurus
Date Posted: 18 Apr 2019 at 9:13am

We have in the shop a H Farmall - issue , the intake valves stick. We removed the valves, reamed the guides and issue remains. Seems no oil is going to lube stems- the rockers only have oil seeping out either side of the rocker - pressure is good.

any ideas ?

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When told "it's not the money,it's the principle", remember, it's always the money..

Replies:

Posted By: Lars(wi)
Date Posted: 18 Apr 2019 at 9:56am

All the intake valves stick? exhaust valves don't?
'pressure is good' where did you measure?
is there enough oil in the crankcase?
if the oil pan has the 2 'petcocks' on the side, oil must drip out the upper one when it is cracked open.

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I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.

Posted By: steelwheelAcjim
Date Posted: 18 Apr 2019 at 11:24am

Has this H been in running order, or are you getting it to run after a long period of sitting??

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Pre-WW2 A-C tractors on steel wheels...because I'm too cheap to buy tires!

Posted By: tbran
Date Posted: 18 Apr 2019 at 12:42pm

owner said sitting a while - we found rocker arms all stopped up - oil now goes to the push rod side but not to the valve side - #2 and #3 intake only sticks. We took head off and reamed the valve guides -plenty of clearance - polished the stems - shimmed the springs - set the lash to .012 hot and the two intakes still stick. It might run 15 minutes - then stick. anytime a load is put on the engine the valves stick. The head top is as clean as possible - no crud.

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When told "it's not the money,it's the principle", remember, it's always the money..

Posted By: tbran
Date Posted: 18 Apr 2019 at 12:53pm

Also when one sprays lube in on the spring while running - it makes the issue worse.

To unstick , one just has to tap the valve and it will pop back up .

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When told "it's not the money,it's the principle", remember, it's always the money..

Posted By: OldAC
Date Posted: 18 Apr 2019 at 2:29pm

If you have any old gas in the system, it will cause the exact thing you mention - Intake valves only to stick. The old gas shellacs up the stems and sticks them.

Been there :(

Posted By: tbran
Date Posted: 18 Apr 2019 at 3:06pm

Drained gas , flushed , added seafoam and another cleaner, fresh gas . Ran a can of carb cleaner through carb with eng running . UNIT THEN RAN GREAT FOR 1 HOUR - pulled it out of shop and both front 2 intake vales stuck open. Also have adjusted carb for lean and rich run - no difference. Kind of a puzzle.

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When told "it's not the money,it's the principle", remember, it's always the money..

Posted By: TimNearFortWorth
Date Posted: 18 Apr 2019 at 3:26pm

Everything that shows up here gets Seafoam in the gas and oil. Had a D15II that sat for years, decent oil pressure but less oil up top than I liked. Seafoam tends to clean up gals pretty darned good but I don't leave it in and work it too long for fear of loosening all the crud and plugging up the sump screen.

Usually drop it after 20-30 minutes at op. temp, leave drain plug out overnight, fresh fill and work it before another oil/filter change within an hour or two of using it.

Posted By: Tbone95
Date Posted: 19 Apr 2019 at 8:34am

That's a really good thought Tim, Seafoam the oil side of the problem too!