Wd stuck exhaust valves
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=205364
Printed Date: 11 Feb 2025 at 12:36am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Wd stuck exhaust valves
Posted By: ToddnwIl
Subject: Wd stuck exhaust valves
Date Posted: 09 Feb 2025 at 5:00pm
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I've recently inherited a wd that used to run. Prolly bin 10 years or so. Got it turning over well and the carb cleaned. Still couldn't get it to run. Today I did a compression test. No compression on the middle two cylinders. So I pulled the valve cover and the exhaust valves are stuck open. Any old school tricks to loosen them without pulling the head.
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Replies:
Posted By: DrAllis
Date Posted: 09 Feb 2025 at 5:33pm
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Lots of penetrating oil from the top side. Get about 10 ft of nylon rope small enough in diameter to shove down inside the spark plug hole (5/16" ?) while the piston is at BDC. Have a knot tied in the rope so you don't lose it. Turn engine over by hand with all that rope coiled up inside. Rinse and repeat for the second cylinder.
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Posted By: ToddnwIl
Date Posted: 09 Feb 2025 at 6:04pm
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Awsome idea!!! I'll give that ago. I knew their had to be an old school trick!!!
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Posted By: Clay
Date Posted: 09 Feb 2025 at 8:29pm
KROIL will help free them up. KREEN is even better than KROIL for stuck rings and valves.
KREEN is made by KANO Laboratories, Nashville, Tn.
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Posted By: steve(ill)
Date Posted: 09 Feb 2025 at 8:39pm
besides the penetrant, tapping on the end of the valve can help SHOCK it.
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Like them all, but love the "B"s.
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Posted By: HudCo
Date Posted: 09 Feb 2025 at 9:33pm
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take the rocker shaft off and start tapping on the valves with a plastic or rubber hammer besides you will need to make sure allof them move smooth. and you will need to replace the push rods that got bent when you got it to roll over
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Posted By: SteveM C/IL
Date Posted: 09 Feb 2025 at 9:45pm
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tap the stem not the retainer
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Posted By: ToddnwIl
Date Posted: 10 Feb 2025 at 7:56pm
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Alittle update. The rope trick worked perfectly! We soaked them down really well. uploads/9354/20250210_180357.jpg" rel="nofollow - 20250210_180357.jpg uploads/9354/20250210_180909.jpg" rel="nofollow - 20250210_180909.jpg
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