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Freeing a Valve?
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CrestonM View Drop Down
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Joined: 08 Sep 2014
Location: Oklahoma
Points: 8474 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CrestonM Quote  Post ReplyReply Direct Link To This Post Topic: Freeing a Valve?
    Posted: 12 Apr 2018 at 10:44pm
A friend of mine is working on an engine with an intake valve that is stuck open. What are some good things to try to get it unstuck without pulling the head? 
Thanks! 
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Clay View Drop Down
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Joined: 11 Sep 2009
Location: Udall, Kansas
Points: 10404 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Clay Quote  Post ReplyReply Direct Link To This Post Posted: 12 Apr 2018 at 11:07pm
Have you tried the rope trick?
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Clay View Drop Down
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Joined: 11 Sep 2009
Location: Udall, Kansas
Points: 10404 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Clay Quote  Post ReplyReply Direct Link To This Post Posted: 12 Apr 2018 at 11:20pm
https://video.search.yahoo.com/search/video?fr=tightropetb&p=stuck+valve+rope+trick#id=3&vid=a093bf13f8c6eb74e7829c445e9277ec&action=click
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CrestonM View Drop Down
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Joined: 08 Sep 2014
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Points: 8474 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CrestonM Quote  Post ReplyReply Direct Link To This Post Posted: 13 Apr 2018 at 12:11am
Thanks! That's a good idea! I'd heard that before but forgot about it until now. I'll tell him!
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DiyDave View Drop Down
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Joined: 11 Sep 2009
Location: Gambrills, MD
Points: 55276 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DiyDave Quote  Post ReplyReply Direct Link To This Post Posted: 13 Apr 2018 at 4:46am
here's the oz version...

[TUBE]-ZQRqyTjuPc[/TUBE]
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Nathan (SD) View Drop Down
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Joined: 11 Sep 2009
Location: Day County SD
Points: 1304 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Nathan (SD) Quote  Post ReplyReply Direct Link To This Post Posted: 13 Apr 2018 at 8:26am
Tap on it with a hammer. Sometimes the spring will lift it back to pre tap position. Continued tapping loosens them up eventually. Have done it twice over the years.
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Allis dave View Drop Down
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Joined: 10 May 2012
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Points: 3131 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Allis dave Quote  Post ReplyReply Direct Link To This Post Posted: 13 Apr 2018 at 11:14am
and generously oiled
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Clay View Drop Down
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Joined: 11 Sep 2009
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Points: 10404 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Clay Quote  Post ReplyReply Direct Link To This Post Posted: 14 Apr 2018 at 12:08pm
Kroil is the oil I have had the most success with, in these situations.  Spray it on. Go have lunch. Give it a gentle tap when you get back to work.  
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R.W View Drop Down
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Joined: 31 Dec 2010
Location: Swanton, OH
Points: 2975 		Post Options Post Options   Thanks (0) Thanks(0)   Quote R.W Quote  Post ReplyReply Direct Link To This Post Posted: 14 Apr 2018 at 2:39pm
Oil and tap on it like others have said is what I've done a couple times. 
In Search Of: 1958 Allis Chalmers D17 Diesel serial #9643D
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ALLISMAN32 View Drop Down
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Joined: 13 Mar 2011
Location: Hillsboro, IN
Points: 199 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ALLISMAN32 Quote  Post ReplyReply Direct Link To This Post Posted: 14 Apr 2018 at 8:00pm
What make is the engine Creston?
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CrestonM View Drop Down
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Joined: 08 Sep 2014
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Points: 8474 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CrestonM Quote  Post ReplyReply Direct Link To This Post Posted: 14 Apr 2018 at 11:18pm
It's a Deere engine in a 55 combine. 

I'll tell the guy these tips and hopefully he'll get it unstuck! Combine only sat a year in a barn, so I'm kinda surprised it stuck after that short amount of time. 
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shameless dude View Drop Down
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Joined: 10 Apr 2017
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Points: 13607 		Post Options Post Options   Thanks (0) Thanks(0)   Quote shameless dude Quote  Post ReplyReply Direct Link To This Post Posted: 15 Apr 2018 at 8:56am
git a rope
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Dick L View Drop Down
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Joined: 12 Sep 2009
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Points: 5093 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dick L Quote  Post ReplyReply Direct Link To This Post Posted: 15 Apr 2018 at 9:08am
If something has not caused the valve stem to be bent I have had good luck placing a block as tall as the other valve stems beside the stuck down valve. Then use a screwdriver under the top of the spring and pry up as I tap on the top of the stem after removing the rocker arm first. With that short of time I might take a chance on light tapping on the rocker arm. If the stem goes down when tapping and there are no space in the spring and it stays down I would be a big fan in removing the head. If the engine was running rough when shut down the last time I would remove the head. On a 55 I would guess the engine has substantial wear in the guides unless recently overhauled. If it stuck from a burned valve and carbon has gone up a worn guide I would worry about the valve head striking the piston. The history of the engine would be helpful to the owner in making a decision on how to proceed if the valve does not free up easy.

Edited by Dick L - 15 Apr 2018 at 9:12am
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Gerald J. View Drop Down
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Joined: 12 Sep 2009
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Points: 5636 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gerald J. Quote  Post ReplyReply Direct Link To This Post Posted: 15 Apr 2018 at 10:39am
I'd be concerned about the valve seat and head being rusty if the valve stem is rusted in the valve guide. Then tapping on the valve stem could move the valve guide out of place and the valve seat may not let the valve close. I think its time to pull the head and do a complete valve job grinding all the valves and making sure the valve guides, valve springs, and keepers are all in good shape.

Gerald J.
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CrestonM View Drop Down
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Joined: 08 Sep 2014
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Points: 8474 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CrestonM Quote  Post ReplyReply Direct Link To This Post Posted: 15 Apr 2018 at 4:17pm
Originally posted by shameless dude shameless dude wrote:

git a rope
Hey, it ain't mine! 
I've tried preaching the Gleaner Gospel, but so far it ain't worked...too much green kool-aid I guess...
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