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Unread 08-19-2012, 12:08 PM   #1
snowcat
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valve adjustment

hey guys i got a 1988 jeep Cherokee limited inline 6 4.0. and i need to adjust my valves how would i adjust my valves because i have loose valve and needs to be adjust but dont know how. could you guys give me some pointer on how to adjust them because my master mechanic buddy is gonna be helping me and idk how and i dont got specs on what the adjustments need to be such as torque and how tight they need to be thank you

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Unread 08-19-2012, 12:13 PM   #2
Motorcharge
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You can't adjust the valves in the 4.0. What makes you think it needs adjusting?
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Unread 08-19-2012, 12:19 PM   #3
snowcat
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they seem loose could i double check the torque or what idk thats what my buddy said ticks under a load such as driving but not at ideal
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Unread 08-19-2012, 12:19 PM   #4
snowcat
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like it tick everytime im driving but not when park online when im driving and giving gas
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Unread 08-19-2012, 12:20 PM   #5
snowcat
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only not online
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Unread 08-19-2012, 12:37 PM   #6
Motorcharge
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The injectors are fairly loud on the 4.0 and can make a ticking sound. The stock exhaust manifold is also prone to cracking and makes a ticking sound as well when it does. I'd start on checking those first.
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Unread 08-19-2012, 12:43 PM   #7
snowcat
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well i dont under stand how it could be injectors because when i pop hood and rev from top of engine doesnt make noise only when im driving thats about it
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Unread 08-19-2012, 12:47 PM   #8
snowcat
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coming from back of the engine on top thats where im hearing noise
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Unread 08-19-2012, 12:49 PM   #9
Motorcharge
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How long have you had it? Is the oil full and when is the last time it was changed? The 4.0 takes 6 qts of oil. Have you ever cleaned the fuel system and motor with seafoam or something similar? Could be sticking lifters.

On an unrelated note you have an XJ Cherokee, not a full size.
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Unread 08-19-2012, 12:58 PM   #10
snowcat
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im do oil change tuesday its full on oil im put some sea foam in that stuff always cleans well so ima try it thanks man ima put full can of sea foam in oil and full thing in gas and whats diffrent on size what you said last
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Unread 08-19-2012, 01:00 PM   #11
Motorcharge
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Full size Cherokees are the old ones from 74-84.

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Unread 08-19-2012, 03:05 PM   #12
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could it do anything with my tranny ???
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Unread 08-19-2012, 03:31 PM   #13
snowcat
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since it has push rods
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Unread 08-19-2012, 03:33 PM   #14
snowcat
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dont you put filler gage between rocker and valve???
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Unread 08-19-2012, 04:31 PM   #15
djb383
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Negative, there is no manual valve adjustment. It is a "zero" lash hydraulic valve train. It adjusts itself automatically.
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