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Fixed: V6 Cutting out at cruising speeds?

Discussion in 'Early CJ5 and CJ6 Tech' started by sparky, May 14, 2006.

Page 14 of 50
  1. Jun 2, 2006
    MOP

    MOP Active Member

    Pullman, WA
    Joined:
    Sep 25, 2003
    Messages:
    1,131
    Re: V6 Cutting out at cruising speeds?

    I talked with an all-knowing co-worker of mine (guess who Sparky ;) ), and he thought it sounded like a vacuum leak. Suggested intake manifold, making sure carb hoses are tight, carb gasket, etc.

    Not my opinion, just that of my all-knowing co-worker.
     
    MOP, Jun 2, 2006
    #261
  2. Jun 2, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    Re: V6 Cutting out at cruising speeds?

    Nice disclaimer. R)

    I'm working up the gumption to go look at it again now that I'm back home. :oops:
     
    sparky, Jun 2, 2006
    #262
  3. Jun 2, 2006
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
    Jul 30, 2003
    Messages:
    8,525
    Re: V6 Cutting out at cruising speeds?

    seeing your dash in the wheel pic.....gave me an idea
    is that tach connected ?
    if so, would you please disconnect it and go run the Jeep
    at your convenience of course.......
     
    jpflat2a, Jun 2, 2006
    #263
  4. Jun 2, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    Re: V6 Cutting out at cruising speeds?

    Makes no difference. I didn't have it hooked up with the points distributor. It's set up to hook up to the HEI so I never bothered to hook it up to the 12V coil.
     
    sparky, Jun 2, 2006
    #264
  5. Jun 2, 2006
    vanguard

    vanguard

    Re: V6 Cutting out at cruising speeds?

    Did you buy new plugs yet?
     
    vanguard, Jun 2, 2006
    #265
  6. Jun 2, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
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    9,221
    Re: V6 Cutting out at cruising speeds?

    Notchet, been on the road the past two days. 800+ miles. Just got home.
     
    sparky, Jun 2, 2006
    #266
  7. Jun 2, 2006
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
    Jul 30, 2003
    Messages:
    8,525
    Re: V6 Cutting out at cruising speeds?

    don't make me drive to Kansas...
    Joel said he would buy the gas ...
     
    jpflat2a, Jun 2, 2006
    #267
  8. Jun 2, 2006
    vanguard

    vanguard

    Re: V6 Cutting out at cruising speeds?

    At least the first $10. :D
     
    vanguard, Jun 2, 2006
    #268
  9. Jun 4, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
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    9,221
    Re: V6 Cutting out at cruising speeds?

    Pulled the heads off after inspecting the plugs more closely. The passenger side plugs showed bits of something on the insulator and the electrodes weren't tan, heck the insulator wasn't really tan either.

    Driver's side head looks good, nice and carbony. The passenger side looks as if it's been burning antifreeze for a while. The fact that the passenger side produced light white smoke was a clue that I'd forgotten until Lex pointed it out to me the other day. :oops:

    Head gasket had a hole in it where there shouldn't have been one. Perhaps that's a clue? Even if this isn't the what caused the problem, looks like I needed to pull the head off anyway.

    So tomorrow they're going into the machine shop for freshening up and some hardened valve seats.
     
    sparky, Jun 4, 2006
    #269
  10. Jun 4, 2006
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
    Jul 30, 2003
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    8,525
    Re: V6 Cutting out at cruising speeds?

    that hole is at a dead end coolant passage
    no concern unless it's not sealing around the perimeter
     
    jpflat2a, Jun 4, 2006
    #270
  11. Jun 4, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    Re: V6 Cutting out at cruising speeds?

    Either it wasn't sealing around the perimeter or I have a cracked head then. :(

    It was blowing white smoke like I said.

    The right bank is notabley different in appearance than the left like I said above. So, what is it then if that's not it?

    Why do I get the feeling I'm just plain screwed now? :(
     
    sparky, Jun 4, 2006
    #271
  12. Jun 4, 2006
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,385
    Re: V6 Cutting out at cruising speeds?

    How does the top of the block look?
     
    Glenn, Jun 4, 2006
    #272
  13. Jun 4, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Re: V6 Cutting out at cruising speeds?

    Looks like this.
     
    sparky, Jun 4, 2006
    #273
  14. Jun 4, 2006
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,385
    Re: V6 Cutting out at cruising speeds?

    I guess you're saying no obvious signs of leaking?
     
    Glenn, Jun 4, 2006
    #274
  15. Jun 4, 2006
    Mcruff

    Mcruff Earlycj5 Machinist

    Albertville, AL
    Joined:
    Sep 22, 2002
    Messages:
    5,349
    Re: V6 Cutting out at cruising speeds?

    Sparky clean that antifreeze out immediatley. Antifreeze will eat and damage the babbit that is in main and cam bearings.
     
    Mcruff, Jun 4, 2006
    #275
  16. Jun 4, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
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    Re: V6 Cutting out at cruising speeds?

    I already did, that photo is from yesterday, right after I took it I cleaned it out.
     
    sparky, Jun 4, 2006
    #276
  17. Jun 4, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
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    Re: V6 Cutting out at cruising speeds?

    Not that I can find anywhere. Just that the right bank looks far different than the left. Something is different on that side. What is it? I don't know what to "fix" here...

    Just white smoke from that side and whiffs of antifreeze after driving it. I always thought the odor was just from not having an overflow tank. Then when Mcruff suggested he'd had a blown head gasket, I thought with the white smoke and the fact that the right side exhaust will suck your hand up agains the tailpipe it was worth looking into. I've got nothing else to go on. I feel like I'm at the end of my rope.
     
    sparky, Jun 4, 2006
    #277
  18. Jun 4, 2006
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
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    Re: V6 Cutting out at cruising speeds?

    got any pics of the intake gaskets that came off ?
    were they the factory metal type ? (what I prefer)
    any obvious signs the intake had been off ?
    I would say the one head hadn't if the gasket was eaten away like that
     
    jpflat2a, Jun 4, 2006
    #278
  19. Jun 4, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
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    Re: V6 Cutting out at cruising speeds?

    I'll take some pics later. But yes, they were factory metal on the intake as well. So trying to decipher your last phrase, that head's bad is what you would think?

    No obvious signs intake's been off that I can tell.
     
    sparky, Jun 4, 2006
    #279
  20. Jun 4, 2006
    Mcruff

    Mcruff Earlycj5 Machinist

    Albertville, AL
    Joined:
    Sep 22, 2002
    Messages:
    5,349
    Re: V6 Cutting out at cruising speeds?

    I like the metal intake gaskets but the stock head gaskets on these motors leave alot to be desired. Mine was eroded away right in the middle between both cylinders on the passenger bank. The block was fine but the gaskets were toast.
     
    Mcruff, Jun 4, 2006
    #280
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