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Blown Gaskets! Again!

Discussion in 'Early CJ5 and CJ6 Tech' started by tone, Jun 1, 2004.

  1. Jun 1, 2004
    tone

    tone New Member

    Atlanta
    Joined:
    May 24, 2004
    Messages:
    34
    i put the new bosch platinum plugs in today and the cj ran GREAT! the old ones were shot... any ways, im pissed, today i was coming home in the cj made it all the way to my hood and got half way though it and the cj died.... started smoking like a mo fo... tryed to start it back up and blew my brand DAMN new gaskets i JUST put on 2 days ago! then started smoking again outta the breather like it was on fire or something..... but i let it sit for a minute and tryed to start it up again and it cranked right up.... i was wondering if anyone knew what the hell is going on with this damn blowing gaskets ordeal, because i sure as hell would like to know its getting on my damn nerves.....

    -thanks
     
  2. Jun 1, 2004
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    Jul 30, 2003
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    7,880
    I'm lost.....what gaskets?
    head gaskets?
     
  3. Jun 1, 2004
    tone

    tone New Member

    Atlanta
    Joined:
    May 24, 2004
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    34
    valve cover gaskets, sorry...
     
  4. Jun 1, 2004
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
    Joined:
    Jul 30, 2003
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    7,880
    I don't know how you "blow" valve cover gaskets ?
    They either seal or they leak.
    Do you have excessive crankcase blow-by?
    Is you PCV plugged up?
    Did you use cork gaskets?
    Did you overtighten them by chance?
    tell us the story
     
  5. Jun 1, 2004
    tone

    tone New Member

    Atlanta
    Joined:
    May 24, 2004
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    34
    dont know what crankcase blow by is.... my PCV is clear i just checked the hose over the weekend, yes i did use cork gaskets, and no i did not over tighten them... im thinking its the carb.... but i have no damn clue thats why im asking.
     
  6. Jun 1, 2004
    coby61

    coby61 Stupidiotic Member

    Prunedale CA
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    Mar 10, 2004
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    388
    Sounds like crankcase pressure build up.....IMHO
     
  7. Jun 1, 2004
    tone

    tone New Member

    Atlanta
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    May 24, 2004
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    so how do i get rid of that? or fix it?
     
  8. Jun 1, 2004
    coby61

    coby61 Stupidiotic Member

    Prunedale CA
    Joined:
    Mar 10, 2004
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    388
    P-positive
    C-crankcase
    V-ventilation
    Pressure from the rotation of the crankshaft, piston moving up and down the cyl, and combustion gases blowing by your rings is building up as you drive. Replace the PCV valve even if you think it is good and run a breather type oil cap on the other valve cover. Make sure that the PCV valve is hooked to a vacume source on the carb or intake.
     
  9. Jun 1, 2004
    tone

    tone New Member

    Atlanta
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    May 24, 2004
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    what about that little elbow peice that connects to the PCV? replace that also? and how can i fit a breather on the other valve cover? and how can i tell if the place where the PCV hose is hooked up to is doing its job?
     
  10. Jun 1, 2004
    coby61

    coby61 Stupidiotic Member

    Prunedale CA
    Joined:
    Mar 10, 2004
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    388
    Replace elbow and hose if possible. Don't know if they make a breather type oil filler cap for the other valve cover, you will have to research. remove the hose from the PCV while the engine is running and you should hear air being sucked in, or put your finger on the hose attached to the carb/intake and you should feel vac.
     
  11. Jun 2, 2004
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Sep 21, 2002
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    9,324
    How about drain holes being plugged/ i.e. oil not draining back fast enough? Or high volume oil pump causing same problem? Any oil pressure/starving issues?
     
  12. Jun 2, 2004
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
    Joined:
    Sep 20, 2002
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    3,449
    Glenn, this thought must have popped into my head at the same time as you posted. This could easily be a result of blocked oil return passages in the heads. (We are talking :v6: aren't we? )
    Pull those valve covers off, locate the drain return holes and make sure they are open the whole way back to the pan.
     
  13. Jun 2, 2004
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Great minds think alike, some times even at the same time! ;) Let's hope we're right. Now if I could just remember what I was thinking about. ;)
     
  14. Jun 2, 2004
    tone

    tone New Member

    Atlanta
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    May 24, 2004
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    ill go take them off again later on today and take some pics... then anyone can MSPaint them and show me the holes that im looking for... thanks!
     
  15. Jun 2, 2004
    tone

    tone New Member

    Atlanta
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    May 24, 2004
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    i took them off off today and got some pics but im not home right now ill put them on when i get back.
     
  16. Jun 2, 2004
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
    Joined:
    Feb 2, 2003
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    747
    tone: Did you get my private e-mail with pics?

    If you're using your old valve covers, no wonder they blow!
     
  17. Jun 3, 2004
    tone

    tone New Member

    Atlanta
    Joined:
    May 24, 2004
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    pics from today

    tell me where that hole is please.. and i was thinking new intake man.? maybe.... let me know.

    -thanks
     
  18. Jun 3, 2004
    tone

    tone New Member

    Atlanta
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    May 24, 2004
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    one more
     
  19. Jun 3, 2004
    Hippo393

    Hippo393 Jeepless

    Charlotte, NC
    Joined:
    Sep 22, 2002
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    1,130
    tone: The PCV valve is connected properly. Way to check PCV funcition is to pull it and shake it in your hand. If you hear/feel an interior mechanism shaking (like a metal ball in a can of spraypaint) then it's ok.
    That passenger valve cover is WACK. Get rid of it! Heads look good otherwise. Good luck. :beer:
    -Alan
     
  20. Jun 3, 2004
    seneca4x4

    seneca4x4 New Member

    Seneca, SC
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    Jan 2, 2003
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    Looks like you already have an air breather type cap on the other side. If that's right, then excess pressure is less likely, unless it's also clogged.

    Maybe an unrelated issue...I did notice that the heads look *rough* where the valve cover gaskets go. Did you clean the gasket area before you installed the new gaskets? Or, are there *pits* in the heads, in that area? Just didn't look right in one of your pics.
     

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