View previous topic :: View next topic |
Author |
Message |
Jordan Member
Joined: Jul 11, 2009 Posts: 93
|
Posted: Mon Feb 10, 2014 7:12 pm Post subject: L-134 stuck exhaust valve. What do do? |
|
|
Guys:
I had my engine overhauled 7-8 years ago. (CJ2a engine in an M-38 jeep). Been sitting in a garage since (a few months outside, but with plugs in). I'm 'bout ready to fire her up and I learned today I've got a stuck exhaust valve on the front cylinder. Valve moves a little, but won't close. Any ideas how to free-up that sucker short of pulling the head?
Thanks,
Jordan |
|
Back to top |
|
|
G740 Member
Joined: Jan 27, 2006 Posts: 499
|
Posted: Mon Feb 10, 2014 7:52 pm Post subject: Stuck valve |
|
|
Get some Freeze Off from local auto parts store. I get it at OReilly.
Great stuff. Have used it to unstick many things and I am always amazed.
Spray it thru the spark plug hole on the valve stem.
John |
|
Back to top |
|
|
Jordan Member
Joined: Jul 11, 2009 Posts: 93
|
Posted: Mon Feb 10, 2014 8:19 pm Post subject: |
|
|
So, hit the valve stem with the freeze off and then crank the engine and see if she breaks loose? Will try it. Thanks for the idea. Never ever heard of freeze off. |
|
Back to top |
|
|
Jordan Member
Joined: Jul 11, 2009 Posts: 93
|
Posted: Mon Feb 10, 2014 9:34 pm Post subject: |
|
|
G740:
Can I access the valve stem through the spark plug hole? Doesn't seem like I can reach it from the spark plug hole. Am I right?
Jordan |
|
Back to top |
|
|
wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16256 Location: Wisconsin
|
Posted: Mon Feb 10, 2014 11:03 pm Post subject: |
|
|
Jordan,
In some bores the plug is over one valve and in others it is over a different valve. Either way you can get the penetrating fluid into the opening at the valve seat if the valve is off it's seat when you spray. Sometimes you will have a straight shot for the spray straw and sometimes you will have to bend the straw a bit and sometimes you can bounce the spray off the edge of the combustion chamber towards the manifolds.
_________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php |
|
Back to top |
|
|
Jordan Member
Joined: Jul 11, 2009 Posts: 93
|
Posted: Mon Feb 10, 2014 11:44 pm Post subject: |
|
|
Thanks guys. Much appreciated. Gonna soak her in some Kroil (or maybe ATF cut with 50% Acetone---they say that's the bomb for penetrant), then hit 'er with Freeze-Off and turn the crank. See if she breaks lose.
Jordan |
|
Back to top |
|
|
oilleaker1 Member
Joined: May 14, 2009 Posts: 971 Location: South Dakota
|
Posted: Tue Feb 11, 2014 6:36 am Post subject: |
|
|
A pain, but you can remove the intake/exhaust manifold and get right at it. Do that id the other methods don't work. Good luck, hope it frees. Since it moves a little, I think you will win. John |
|
Back to top |
|
|
Jordan Member
Joined: Jul 11, 2009 Posts: 93
|
Posted: Tue Feb 11, 2014 8:05 pm Post subject: |
|
|
Can valve seats be recut while the engine sits in the jeep? I've got rust damage to two seats which will prolly require recutting the seats. The others can prolly be lapped. Valve man is coming Friday for a look-see. I sure as heck hope I don't have to pull the motor. (Left her in the rain once with loose plugs in the cylinders and water leaked in. My fault.) |
|
Back to top |
|
|
wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16256 Location: Wisconsin
|
|
Back to top |
|
|
Jordan Member
Joined: Jul 11, 2009 Posts: 93
|
Posted: Tue Feb 11, 2014 10:44 pm Post subject: |
|
|
That's what I am afraid of. We'll see. |
|
Back to top |
|
|
RICKG Member
Joined: Aug 31, 2010 Posts: 1741 Location: SO IDAHO
|
Posted: Wed Feb 12, 2014 8:36 am Post subject: |
|
|
In the 1st post you were searching ways to free a stuck valve
w/o pulling the head.
I'm guessing that if you're looking at damaged valve seats you've
gone ahead and pulled the head .
Did you get the stuck valve freed?? _________________ keep 'em rollin'
RICKG MC 51986 DOD 01-52, '50 CJ3a |
|
Back to top |
|
|
Jordan Member
Joined: Jul 11, 2009 Posts: 93
|
Posted: Sat Feb 15, 2014 4:36 pm Post subject: |
|
|
Yes. We pulled the head and all valves and recut all seats and also dressed the valves. Hope to have her reassembled by tomorrow.
Thanks for all the help here.
Jordan |
|
Back to top |
|
|
|