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Compression test fucked......

Discussion in 'Cherokee' started by N9neFINGERS, Oct 4, 2016.

  1. Oct 4, 2016 at 1:12 AM
    #1
    N9neFINGERS

    N9neFINGERS [OP] New Member

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    First Name:
    Jeff
    Vehicle:
    1998 jeep grand cherokee inline 6
    33in tires, 3in lift, straightpiped, Dana 44 rear 4x4
    So I did a compression test on all 6 cylinders (cyl.1 was 52, cyl.2 was 0, cyl.3 95, cyl.4 90, cyl.5 was95, cyl.6 was 160) I'm at the point I'm not sure what to do I am doing a wet test on Wednesday to see if it's a top end problem or a bottom end problem, has anyone dealt with this or know what I could possibly do to resolve it, it started when my jeep over heated due to a shitty thermostat so I've replaced that and distributor cap and spark plugs. But that is all
     
  2. Oct 4, 2016 at 6:50 AM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine Moderator

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    Welcome! It might just need some new pistons and hone the cylinders. Not that big of a deal on the 4.0
     
  3. Oct 4, 2016 at 7:29 AM
    #3
    C2T

    C2T Well-Known Member

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    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    If #2 is at zero you have a big issue. (not that #1 being at 52 is good) As for #2...Are you getting fuel in the oil? If so, it could be broken rings or a hole in a piston. If no fuel in oil, you may have a broken/stuck/burnt valve. Of course, a blown head gasket is a possibility but I think less likely unless you are leaving some symptoms out. There are a few more things but these are the most common. The bad news: I don't see any way to avoid pulling the head off. The good news: It will likely answer all your questions one way or the other.

    Good luck with it. Oh...and pay attention when you start to remove the head...you could always find the problem along the way like with a rocker or some such after you remove the valve cover. Keep looking for the easy stuff on the way to the hard stuff. Sometimes that pays off big in saving time and money.

    Good luck with it.
     
    N9neFINGERS [OP] and chris4x4 like this.
  4. Oct 6, 2016 at 1:59 AM
    #4
    N9neFINGERS

    N9neFINGERS [OP] New Member

    Joined:
    Oct 4, 2016
    Member:
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    Messages:
    2
    Gender:
    Male
    First Name:
    Jeff
    Vehicle:
    1998 jeep grand cherokee inline 6
    33in tires, 3in lift, straightpiped, Dana 44 rear 4x4
    Thanks ya I'm getting back at it on friday...I got kinda fucked being in the Marines I've got more important shit to do than work on my only transportation but ya I have all day Friday Saturday Sunday
     
  5. Oct 6, 2016 at 7:30 AM
    #5
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
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    Messages:
    759
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    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    Marines???? How the hell did you get a three day weekend? lol (cough!) Thanks for your service. :) :oldglory:
     
  6. Oct 6, 2016 at 10:09 AM
    #6
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine Moderator

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    X2! Thanks for your service!!
     
  7. Oct 17, 2016 at 8:20 PM
    #7
    Choppin Trailz 89yj

    Choppin Trailz 89yj Mad hatter

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    North central P.A,Tioga county
    Vehicle:
    1989Black,YJ
    2.5inch Rough Country lift w/ hydrolic shocks. next step 3.75 offset 15 by 8 in rims w/ 32 by 11.50 dick cpeck mt tires
    not sure what service you refer to, but its just how jeepin should always be. good trails,good people,and a hand when its needed
     
  8. Oct 17, 2016 at 9:08 PM
    #8
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
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    Messages:
    759
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    Really? The man is an active-duty Marine. Hooraaah! That is the service I refer to and thank him for.
     
    chris4x4 likes this.
  9. Oct 24, 2016 at 12:07 PM
    #9
    Choppin Trailz 89yj

    Choppin Trailz 89yj Mad hatter

    Joined:
    Oct 2, 2016
    Member:
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    Messages:
    7
    Gender:
    Male
    North central P.A,Tioga county
    Vehicle:
    1989Black,YJ
    2.5inch Rough Country lift w/ hydrolic shocks. next step 3.75 offset 15 by 8 in rims w/ 32 by 11.50 dick cpeck mt tires
    yea no doubt. . .my thnx to him and all our armed service members as well. . . i glitched in not up to speed with the conversation. . for this I appologize
     
  10. Oct 24, 2016 at 12:57 PM
    #10
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    759
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    :cheers:
     

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