1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

258 running at 230-240. Is this high??????

Discussion in 'Intermediate CJ-5/6/7/8' started by dsfordguy, Dec 6, 2007.

  1. Dec 16, 2007
    mcgillacuddy

    mcgillacuddy Member

    Kalama, WA
    Joined:
    Nov 14, 2007
    Messages:
    316
    I still think there is air in the system. Did you try to take out the thermostat and run it without it to see what the results are?
    What You will be looking for is not necessarily a temp change...but rather the mount of pressure in the system when the gauge reads 190+.
     
  2. Dec 16, 2007
    dsfordguy

    dsfordguy New Member

    Joined:
    Sep 22, 2007
    Messages:
    36
    I took the t-stat out today and I could not get it to run higher than 140 so then I know the cooling system was sufficient enough so I went ahead and put the old 180 t-stat back in and now it only runs up to 180 and I even got to take it out mudding today to make sure it wasn't getting hot and it didn't. It had to be either that there was air in the system and taking the t-stat out and running it made it burp it up or those two brand new t-stats were both defective. Thanks to all of you that have helped cuz its now running like a jeep!!!!
     
  3. Dec 17, 2007
    mcgillacuddy

    mcgillacuddy Member

    Kalama, WA
    Joined:
    Nov 14, 2007
    Messages:
    316
    Yep..it was air...I have fought some cars and trucks tooth and nail trying to get an air bubble out..and other will burp with no problem. Glad it worked out for you.
     
  4. Dec 17, 2007
    spclark

    spclark Member

    Joined:
    Jul 24, 2007
    Messages:
    54
    I've followed this thread and will check the 'air in the system' thing tonight. I just flushed my cooling system Saturday, and ran it both Saturday and Sunday. On Saturday, it seemed to stay right at 180 or a little below. I'm in So Cal, cool outside. But Sunday, I was coming back from home depot and it started to creep up to about 200 or so..maybe a little above. It was still climbing when I got home and shut it off. I've had this 'intermittent' over heating problem for a while. It's a 74 cj5 with a chevy 350 and custom aluminum radiator, electric fan. I've thought in the past that maybe the fan is intermittently switching off (it is not connected for therm control so it should run all the time) but it seems that it is always on so I don' think that's the problem. I changed the thermostat out a while back and that seemed to 'fix' the problem, but now it creeped back again, so I flushed the whole system, replaced hoses etc. So MY question is....could AIR in the system cause intermittent over heating problems? I should have drilled the t-stat when I had it out on Saturday. One other note..when re-filling the system, I was surprised at how LITTLE coolant it held. I barely got 2 gallons (8 quarts) in it before it was 'full'. I've checked and rechecked after each short drive, and I've added maybe a couple quarts to keep topping it off. Since it's an aftermarket radiator, I really don't know how much it should hold, but I was thinking more like 15 or so? This also leads me to believe there may be air in the system.

    Thanks,
    Steve
     
New Posts