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

Engine temp concerns

Discussion in 'Intermediate CJ-5/6/7/8' started by Maverick, Jul 26, 2011.

  1. Jul 26, 2011
    Maverick

    Maverick Member

    Joined:
    Apr 30, 2006
    Messages:
    119
    I have a 74 cj5 with an overhauled 304, new 195 thermostat, water pump new with the rebuild, new radiator and shroud, the fan clutch is original, and lastly timed at 5 degrees BTDC. The gauge reads 210 degrees when up to temp, you can watch it go to 210 at start up drop to 195 and go back up to 210 and stay. I hit it with the IR gun the engine is 210 the top hose 180's and the bottom hose 140's. Would anyone care to share whether or not this is operating in a safe range? Or am I chasing a non-issue?

    Thanks,
    Maverick
     
    Maverick, Jul 26, 2011
    #1
  2. Jul 26, 2011
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
    Joined:
    Sep 22, 2002
    Messages:
    8,360
    How many miles since the overhaul? They'll run hot after a rebuild, before it's broke in..
     
    Patrick, Jul 26, 2011
    #2
  3. Jul 26, 2011
    Maverick

    Maverick Member

    Joined:
    Apr 30, 2006
    Messages:
    119
    Maybe 500 miles give or take.
     
    Maverick, Jul 26, 2011
    #3
  4. Jul 26, 2011
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
    Jul 30, 2003
    Messages:
    8,524
    I think it's non-issue and you have an active thermostat.
    and a very reactive gauge to that reading.
     
    jpflat2a, Jul 26, 2011
    #4
  5. Jul 26, 2011
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
    Joined:
    Sep 22, 2002
    Messages:
    8,360
    That should be enough....
     
    Patrick, Jul 26, 2011
    #5
  6. Jul 27, 2011
    Chilly

    Chilly Active Member

    Joined:
    Mar 12, 2007
    Messages:
    1,486
    Three core radiator?
     
    Chilly, Jul 27, 2011
    #6
  7. Jul 27, 2011
    73cj5

    73cj5 Member

    Maine
    Joined:
    Jan 15, 2004
    Messages:
    905
    With a lower rad hose temp of 140 he is getting adequate cooling. Make sure the pressure cap is working and run it.
     
    73cj5, Jul 27, 2011
    #7
  8. Jul 27, 2011
    johneyboy03

    johneyboy03 The green beast

    Quebec, Canada
    Joined:
    Jan 15, 2011
    Messages:
    2,118
    i do have the same problem as you, my engine as been rebuilt and i run a 180 thermostat and the engine goes around 200-210 while hot...my engine has just been rebuilt...i did about 1000 miles and i'm going to flush the breaking oil tomorow...
     
    johneyboy03, Jul 27, 2011
    #8
  9. Jul 28, 2011
    DREDnot

    DREDnot Not new to JEEPS

    AZ
    Joined:
    Feb 7, 2010
    Messages:
    646
    All normal. 210 was always the normal temp on my 4.0L XJ

    You are getting the correct temp water past the thermostat.
    You would think they would place the temp pickup so that it is near the hottest spot on the water jacket.

    It is good insurance to have a new fan clutch, but you should not neccesarily expect a drop in gauge temps if you do install one. Lower radiator hose temps, and reserve cooling capacity would probably benefit,though.
     
    DREDnot, Jul 28, 2011
    #9
  10. Jul 28, 2011
    bigjohn

    bigjohn Active Member

    Kelso Wa
    Joined:
    Mar 18, 2010
    Messages:
    1,079
    Where is the temp sensor plumbed. Mine is on the drivers side towards the rear of the block and I run about 205 -210 all the time. I hit it with the infrared gun though and the temp at the thermostat is right at 185. If this is where yours is run, I would not worry.
     
    bigjohn, Jul 28, 2011
    #10
  11. Jul 28, 2011
    Corveeper

    Corveeper Member

    Chanute, Kansas
    Joined:
    Jul 29, 2005
    Messages:
    817
    210 is acceptable but if it bothers you switch to a cooler thermostat.
     
    Corveeper, Jul 28, 2011
    #11
  12. Jul 28, 2011
    Bob Greenslade

    Bob Greenslade Member

    Roseville CA
    Joined:
    Sep 15, 2008
    Messages:
    232
    The temp on my 360 is at least 210 usually hotter. It ran even hotter when I had a cooler thermostat in it. I'm also runing 538 gears which doesn't help on the freeway.
     
    Bob Greenslade, Jul 28, 2011
    #12
  13. Jul 29, 2011
    Maverick

    Maverick Member

    Joined:
    Apr 30, 2006
    Messages:
    119
    Mine is in the front of the engine.

     
    Maverick, Jul 29, 2011
    #13
  14. Jul 29, 2011
    Maverick

    Maverick Member

    Joined:
    Apr 30, 2006
    Messages:
    119
    I'll take a look to see what radiator I have, I ordered it for a cj with a 304.
     
    Maverick, Jul 29, 2011
    #14
New Posts