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couple of plumbing questions...

Discussion in 'Early CJ5 and CJ6 Tech' started by Taper, May 29, 2006.

  1. May 29, 2006
    Taper

    Taper New Member

    Joined:
    Mar 23, 2006
    Messages:
    33
    Got a 65 CJ5 and the PO installed a aftermarket water block heater. There were a total of 3 heater hoses coming out of the block. 1 from the water pump, one from the right side of the block directly in front of the starter, and the 3rd coming off the top of the engine manifold by the firewall. Just to be sure, to run a heater, a person only needs the flo from the water pump, to the heater core, out from there into the fitting on the top of the manifold. I could just plug the fitting on the side of the block...correct?

    Second question. There is a "T" fitting. One large hose goes from the T into the oil breather, a tiny one which, I assume is a vac line which runs into the firewall and controls the heater box vac diverters, and then there is this 3rd which runs across the front of the motor down by the fuel pump. It had been plugged. There is a aftermarket fuel pump installed, and am I correct in assuming that the original fuel pump had a fitting for the vacuum side where the 3rd line is supposed to connect? Is this the vac source for the heater controls?
    I've taken the time to create a msword.doc to help in my query. Please click:
    http://home.swbell.net/tape-rr/mystery.htm


    Thanks
    Mike in KC
     
  2. May 29, 2006
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
    Joined:
    Feb 2, 2003
    Messages:
    747
    Mark: Your first question, the answer is yes. Your second question is "I don't know". My '68 has the vac for the heater controls comming from a fitting on the intake manifold behind the carb.. Don't know what a vac hose would be doing down by the fuel pump. If you had vaccume wipers, some old cars had a vaccume pump on the fuel pump, but '65's had electric wipers.

    I'd wait for some other replies. Something is not "right" here. Usually, the breather from the oil cap goes to the air filter and not the manifold, that is if you don't have a PCV valve from the rocker cover to the base of the carb. The PCV valve is actually the outflow from the block and the one from the valve cover cap to the filter is the intake.
     
  3. May 29, 2006
    captain cj

    captain cj Member

    Crystal Beach...
    Joined:
    Sep 27, 2005
    Messages:
    331
    My 65 has vacuum wipers. Dont know why there would be a vacuum line by the fuel pump.:?
     
  4. May 29, 2006
    Taper

    Taper New Member

    Joined:
    Mar 23, 2006
    Messages:
    33
    Thanks for the answer to the first question. As for the second, maybe I wasnt too clear in my description. I confuse myself sometimes...:rofl:
    Anyway, a picture is worth a thousand words:
    http://home.swbell.net/tape-rr/fitting.jpg
    The top fitting is a teeny one....one that appears to be a vacuum line thru the firewall and onto the heater vacuum controllers. The huge one....pointing forward...goes to the breather cap on the valve cover. The rearward one, the one in question, runs in front of the timing cover and ends near the fuel pump and was plugged with a bolt. This led me to ask the question: Did the early fuel pumps have both a fuel pump fitting and a vacuum fitting? I remember reading that the fuel pump was fuel pump/vacuum pump. Thus, I thought that this might be where the hose in question connects to...as a source for vacuum to control the heater box. (possibly also sucking out the excess blow-by from the valve cover???) The PO put a after-market fuel pump on the F-Head...which further leads to my confusion. If anyone would care to elaborate...I'd appreciate it.
    By the way...is the fitting that all the hoses connected to actually part of the intake manifold and getting the vaccum directly from there? Dont feel like any....

    Mike in KC
     
  5. May 29, 2006
    $ sink

    $ sink Gazillians of posts

    Virginia Bch
    Joined:
    Nov 25, 2004
    Messages:
    1,373
    no expert here, but it appears that you have your small vacuum line for your heater control tapped into your crankase vent which is a bad idea. it should be tapped directly into the intake manifold. the large hose is your crankcase vent and depending on the year would either be vented to atomosphere under the jeep or routed into the side of your stock air cleaner. it should not under any circumstnaces be plugged with a bolt.
    the bolt is probably some PO's attempt to generate vacuum to operate the heater which probably does not work. $.02
     
  6. May 29, 2006
    Taper

    Taper New Member

    Joined:
    Mar 23, 2006
    Messages:
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    ok.....getting really confused here. I am assuming that the fitting under the carb (mounted to the head) is factory and belongs there. I am also assuming that the huge hose belongs there also (from the fitting in question to the breather on the top of the valve cover) So then, the needle type connector on the fitting also appears to be factory but does not belong there ? (supplying vac to the heater box?) As for the larger hose pointing rearward, it was routed nicely...in front of the timing cover completely tucked in and adjacent to the fuel line and also appeared factory, except for the bolt obviously. It seems to me that the PO who put the bolt in, didnt remove nor add anything else. Can anyone please supply a picture of the way the factory did it as when new? Surely there is a purist out there with a nicely restored 65 CJ5 that has it done correctly. Meanwhile, I am scouring my reference books and the net till I find the answer. Bugs the crap out of me...
    But thatnks to all whom have taken the time to reply.

    Mike in KC
     
  7. May 29, 2006
    Taper

    Taper New Member

    Joined:
    Mar 23, 2006
    Messages:
    33
    I have taken some time to really , really explain things. I created a word.doc for you all to click and view. Hopefully, this will help you understand the current condition my jeeps sits in.
    Please read if you have time, and post any input.

    http://home.swbell.net/tape-rr/mystery.htm

    THanks
    Mike in KC
     
  8. May 30, 2006
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
    Jul 30, 2003
    Messages:
    8,513
    "ok.....getting really confused here. I am assuming that the fitting under the carb (mounted to the head) is factory and belongs there"

    it is and it does

    "I am also assuming that the huge hose belongs there also (from the fitting in question to the breather on the top of the valve cover)"

    it does

    "So then, the needle type connector on the fitting also appears to be factory but does not belong there ?"

    it does. that's the pcv valve.

    sorry, I haven't located a good pic yet
     
  9. May 30, 2006
    Rondog

    Rondog just hangin' out

    Parker, CO
    Joined:
    Aug 25, 2005
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    I believe the fitting you're talking about here is actually where the antifreeze drain pet**** for the block goes.
     
  10. May 30, 2006
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
    Joined:
    Dec 22, 2002
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    edited... checked out the pics.

    Ok, the line you have running down by the fuel pump more than likely was a vacume line to the vacume/fuel pump. Unless you'r using vacume wipers, you shouldn't need that pump unless you want to go back to original. Most of the jeeps I've seen just have a standard fuel pump only. The "crankcase ventilator" on the side valve cover is missing on one of my engines too. It ties into the vent tube at the top valve cover if I remember right. And if that doesn't confuse you enough, some jeeps didn't have that ventilator hose on the top valve cover. Don't know what the year breaks where, but I've got 2 with the vent, and one without.

    Yea, that brass block is supposed to be there. Not sure where the 2 small lines go since the small one going over the top of the head was broken off, and the rubber line going back was plugged off.
     
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