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L-Head #2 Cylinder Valves

Discussion in 'Flat Fender Tech' started by DanStew, Dec 28, 2016.

  1. Dec 28, 2016

    DanStew Incorrigible. Staff Member Sponsor

    Lexington, South...
    Sep 22, 2002
    Trying to get my jeep up an going i found i have 0 compression in my #2 cylinder. And since i have an oily residue covering the top of my carb, i beleive the intake valve is stuck or the spring is broken and the cylinder is sending air back into the intake and carb. That being said, i have not found an answer for a question i had.

    Can I access the #2 cylinder with the manifolds still on the motor? Or do i need to pull them to get at the valve and possibly repalce a broken spring?
    Also i hear about soaking valve stems in tranny fluid or other fluid to get them unstuck, does this have to be done with the head off? I am trying not to pull apart my motor just yet until i can get it to at least run pretty good, i would like to try and keep it together when trying to remedy this zero compression issue.

  2. Dec 28, 2016

    47v6 junk wrecker! Sponsor

    Washington DC.
    Oct 25, 2006
    Pull off the valve cover at look at the lifters. Turn the engine with a socket and see whats wrong.
  3. Dec 29, 2016

    duffer Rodent Power Sponsor

    Bozeman, MT
    Sep 17, 2009
    The valve cover may be problematic------

    I think you can remove the lifter gallery cover with the manifolds in-place but access to lifters for cylinders 2 & 3 will be very restricted. However, you should be able to see if there is a broken spring.
  4. Dec 29, 2016
    Mark Wahlster

    Mark Wahlster Member

    Silverton, OR
    Dec 17, 2015
    The answer to your question is basically NO. I can't imagine any way to get a spring compressor into a spring on a 134 L head with the manifolds in place. You can see the spring and stem though if you find a line of sight or use a mirror. If you have not removed your manifolds yet. I would count on breaking 2-4 of the studs off and having to deal with that.

    All you have to do to see if a valve is stuck is take the spark plug out. The plugs are centered over top of the valves. Use a pen light to shine down the plug hole and watch as the engine is rotated.

    Are you getting blow back through the carb when the engine is running or being cranked? if not it might be an exhaust valve.

    By the way not to be picky but a 134 L does not have lifters they have adjustable tappets that ride on the cam and then the bottom of the valve stem sits approx. 014-016" above the adjustment screw when that cylinder is at TDC.
  5. Jan 18, 2017

    Wenaha Member

    West Coast
    Feb 6, 2014
    Pull head and turn over the engine manually. You're going to have to remove the head anyway so do it now.

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