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  • exhaust in valve cover

    so i have exhaust coming through my valve cover. i'm no mechanic but i'm pretty sure this isnt normal haha. i noticed when i opened my oil cap and could hear the exhaust get louder and air was being pushed out. runs fine, starts right up no problems so i'm thinking the compression is alright. could the pcv be plugged?
    2 tj's
    3 yj's
    2 xj's
    i'm a jeep whore

    "id walk 6 hours one way to suck a fart out of megan fox's ass"

  • #2
    I think you are on the right track. Possibly a pcv issue or piston rings/cracked head which would be revealed by a compression test.

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    • #3
      is it burning oil a lot?

      97 TJ that I think is pretty neat.

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      • #4
        Originally posted by Arundlemcbrundle View Post
        so i have exhaust coming through my valve cover. i'm no mechanic but i'm pretty sure this isnt normal haha. i noticed when i opened my oil cap and could hear the exhaust get louder and air was being pushed out. runs fine, starts right up no problems so i'm thinking the compression is alright. could the pcv be plugged?
        Isnt the pcv in the valve cover?
        I wouldnt think it is a pcv issue.
        If you are building up pressure in the valve cover and the pcv is clogged I think it would just pop out of the grommet.
        2 Broncos are better than 1

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        • #5
          pcv is in the valve cover....chris is correct.

          97 TJ that I think is pretty neat.

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          • #6
            bad exhaust valve stem seal?

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            • #7
              a pcv is uber cheap, replace that first. if that doesnt fix it, i'd be willing to bet crosby is right and its a valve seal.
              No worries, I'm not actually back, I'm just reminiscing about the old days.


              ForSure Motorsports
              Win or Lose, We Booze.


              Vice President of Internal Affairs at Dirty Donny's House of Hookers

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              • #8
                Originally posted by crosbike View Post
                bad exhaust valve stem seal?
                thinking this over last night falling asleep(ya i have no life) it doesn't have to be an exhaust valve seal. It could be an intake as well. Just a clarification

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                • #9
                  Is there oil in your exhaust?
                  2 Broncos are better than 1

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                  • #10
                    Def check compression.sounds like a valve seal to me.

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                    • #11
                      Im not sure how 4 liters have their valve seals but on most engines the intake seal is much more of a seal then the exhaust seals are. they are actually called umbrella seals. The intakes are more burly because clearly noone wants oil to get into the cylinder on the intake stroke. this will burn a shit ton of oil. the exhaust valve seal isnt quite as good of a seal because the engine wont be burning oil coming through the exhaust valve guide as the exhaust exits the motor. sometimes they are made of a hard plastic which doesnt seal too well. However, if the seal is bad, and even if the valve guide is bad (which would suck), exhaust will come into the head.

                      97 TJ that I think is pretty neat.

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                      • #12
                        he has a 2.5l btw.

                        shoulda kept a cherokee
                        I drive a Datsun

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                        • #13
                          Originally posted by Burton58 View Post
                          he has a 2.5l btw.

                          shoulda kept a cherokee
                          same engine minus 2 cylinders

                          97 TJ that I think is pretty neat.

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                          • #14
                            i know just throwing it out there. and obviously xj's are perfect so he should have kept that
                            I drive a Datsun

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                            • #15
                              Originally posted by armadasx View Post
                              Def check compression.sounds like a valve seal to me.
                              Why check compression?
                              2 Broncos are better than 1

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