Newb w/ 40 running hot

Discussion in 'SC- Upstate Cruisers' started by Jon in NC, Jul 27, 2005.

  1. Jon in NC

    Jon in NC

    Messages:
    252
    Likes Received:
    0
    Joined:
    Jul 19, 2005
    Location:
    Southeast of disorder
    New to Toyota's, just got a 71 FJ40, and it is running hot, are the thermostats availible at NAPA or Advance Auto? Anyone have a part # for it and the gaskets? I'm guessing it's the t-stat, gage is on H and the rad isn't hot. Sound about right?
     
  2. ClemsonCruiser

    ClemsonCruiser SILVER Star

    Messages:
    8,867
    Media:
    1
    Albums:
    1
    Likes Received:
    1,777
    Joined:
    Feb 17, 2004
    Location:
    Clemson, South Carolina
    Jon, you can get a T-stat at any local parts store, I don't know about the gaskets though. How long after you crank it up does it start to read hot?
     
  3. Capt. Jim

    Capt. Jim

    Messages:
    2,213
    Likes Received:
    2,726
    Joined:
    May 1, 2005
    Location:
    West Palm Beach, Florida
    Be careful with the bolts on the T-stat housing. You can break them or break the housing corner at the lower portion of the housing.
     
  4. Gundy

    Gundy

    Messages:
    3,191
    Likes Received:
    10
    Joined:
    Jan 2, 2003
    Location:
    Dweller on the Threshold
    question

    Are you getting fluid loss? The stock gauges can get a little wonky
    after 30+ years. You note the engine isn't hot, just a high reading on the gauge.
    Our 60's gauge reads high and a test with a mechanical gauge confirmed
    the wonkiness.
    Many use a mechanical gauge to be sure. I do in my 40. 40s with stock engines
    tend to NOT overheat. They'll run all day just off idle on the trail cool
    and calm.
    I'd suggest getting a factory Toyota thermostat and carefully install.
    It's not expensive and yours probably hasn't been changed in years.
    If memory serves me correct, they use an "O" ring for a gasket.
    Also be careful. The 'stat can be installed upside down. ;)
    Hope you can make it to our annual meeting 8/27/05. We'd love to
    see you there!
     
  5. Jon in NC

    Jon in NC

    Messages:
    252
    Likes Received:
    0
    Joined:
    Jul 19, 2005
    Location:
    Southeast of disorder
    True about the gauge. It spit coolant out the overflow tube last night sitting at a red light and I noticed the gauge read H. Checked the rad and it wasn't boiling or low. Let it sit for about 4 hrs., gauge still read H. I just got this thing, don't want to burn it up now.
     
  6. Gundy

    Gundy

    Messages:
    3,191
    Likes Received:
    10
    Joined:
    Jan 2, 2003
    Location:
    Dweller on the Threshold
    Well...

    spitting out of the overflow is not good. Too bad you aren't a UC
    member. You'd get a 25% discount on parts from Ralph Hayes Toyota
    in Anderson SC. LOL....at $10(dues) it only takes a couple of small part orders
    to get a return on your investment. ;)
    In a pinch you can run it without a 'stat.
    Perhaps you could try that to see if the 'stat is your problem.
    You can test them to see if they open by placing the 'stat in hot
    water and see if it opens. HOT water. Like 180 degree or so.
     
  7. ClemsonCruiser

    ClemsonCruiser SILVER Star

    Messages:
    8,867
    Media:
    1
    Albums:
    1
    Likes Received:
    1,777
    Joined:
    Feb 17, 2004
    Location:
    Clemson, South Carolina
    When I first got my cruiser, a few years back, mine was over heating so I yank the T-stat and just ran without one fore quite a while. It solved my overheating but once the weather turned cold I didn't have much heat, so I got a new T-stat in there.
     
  8. Capt. Jim

    Capt. Jim

    Messages:
    2,213
    Likes Received:
    2,726
    Joined:
    May 1, 2005
    Location:
    West Palm Beach, Florida
    Also check or replace the radiator cap.
     
  9. Jon in NC

    Jon in NC

    Messages:
    252
    Likes Received:
    0
    Joined:
    Jul 19, 2005
    Location:
    Southeast of disorder
    Thanks for the info. I'll probably pull the t-stat this weekend. To busy drawing house plans to do it now.
     
  10. CruisinTiger

    CruisinTiger

    Messages:
    2,973
    Likes Received:
    146
    Joined:
    Oct 22, 2004
    Location:
    Clemson, SC
    yeah my 60 is over heating still after replacing the stat. I'm gonna yank the radiator on friday and take it to a guy in seneca and have it boiled and welded to hope it fixes the problem. Do you have any small leaks around the top of the radiator, could be loosin compression, along the same lines as a loose rad cap.
     
  11. Jon in NC

    Jon in NC

    Messages:
    252
    Likes Received:
    0
    Joined:
    Jul 19, 2005
    Location:
    Southeast of disorder
    Update; Checked the oil today and it was down about a qt. Added some ana topped of the coolant, then drove it back here to school. Ran cool all the way. Would being a qt. low on oil make that much difference? The reason I didn't check the oil before, the pressure gauge was reading high now it is in the middle. ? I still may take out the t-stat this weekend.
     
  12. Gundy

    Gundy

    Messages:
    3,191
    Likes Received:
    10
    Joined:
    Jan 2, 2003
    Location:
    Dweller on the Threshold

    Perhaps a cautionary note should be sounded. Never trust gauges
    completely. Rountine inspections, especially after driving as a DD,
    are your Cruiser's best friend....after you, of course.
    I like mechanical gauges.

    Losing oil and water aren't good. Find the source of any
    such leaks. Sealed properly, oil/fluid losses should be minimal.
    Good luck. Keep your eyes open.
    One qt low should not make much, if any, kind of a difference
    in engine temps.
     
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.