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Valve problems

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Old Jan 8, 2012 | 03:24 PM
  #1  
19cherokee96's Avatar
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From: southern ohio
Year: 1996
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Engine: 4.0 HO
Default Valve problems

Hey guys I believe I have a stuck valve but it's making some noise too what's the best way to get a valve to unstick
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Old Jan 8, 2012 | 04:10 PM
  #2  
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From: Broward County Fl.
Year: 1989 xj sport 2dr
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Engine: 12 hole bosch Injectors
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Maybe a colapsed lifter ticking?
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Old Jan 8, 2012 | 05:45 PM
  #3  
19cherokee96's Avatar
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From: southern ohio
Year: 1996
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Engine: 4.0 HO
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I took of valve cover and hit the valves with a hammer really light and one acted stuck
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Old Jan 8, 2012 | 08:26 PM
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Actually you really shouldnt hit those things it can lead to damaged rockers, retainers, etc.... You can pull the coil wire, and fuel pump relay and have some turn the engine over and watch make sure the valves are all moving the same. besides the springs will keep the the valves closed if the others moved I would be concerned about that.
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Old Jan 8, 2012 | 08:48 PM
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From: Nor-Cal Coast
Year: 90,84
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I took in a head core for a chevy once. The guy checking it had all the valve keepers off in about 15 seconds with a hammer! (he looked like he had done a few).

Yea, X2, ^ pull the coil wire and turn it over a little, is it really stuck? I've seen the intake gum up on other engines.
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Old Jan 8, 2012 | 08:54 PM
  #6  
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From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
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Originally Posted by DFlintstone
I took in a head core for a chevy once. The guy checking it had all the valve keepers off in about 15 seconds with a hammer! (he looked like he had done a few).

Yea, X2, ^ pull the coil wire and turn it over a little, is it really stuck? I've seen the intake gum up on other engines.
Just unplug the primary plug on the coil, pulling the secondary lead off can result in damage to the PCM.
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Old Jan 8, 2012 | 09:12 PM
  #7  
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From: Landers, CA
Year: Several
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If a valve is stuck open, you'll see the rocker's loose and sloppy.
Stuck closed you'll see the pushrod bent and came off.
No hammer needed.

Why do you think you had a stuck valve - noise?
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Old Jan 10, 2012 | 06:22 PM
  #8  
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From: southern ohio
Year: 1996
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It's a ticking in the top end of the motor it sounds like and when I'm driving it's ticking but if I accelerate and let off it stops as rpms drop I drive a manual so if I shift while rpms are dropping it stops
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Old Jan 10, 2012 | 06:23 PM
  #9  
19cherokee96's Avatar
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Oh and it is very sputtery in the mornings until it is warmed up and push rods didn't seem bent nothing noticeable
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Old Jan 10, 2012 | 06:27 PM
  #10  
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From: ct
Year: 1991
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sunk lifter
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Old Jan 12, 2012 | 07:45 PM
  #11  
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From: southern ohio
Year: 1996
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Yea I wondered about that I'm thinking wait till it doesn't run anymore than v8 swap
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