1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

3.0l v6 overheating

Discussion in '95-older Toyota Truck Tech' started by arlingallagher, Aug 21, 2006.

  1. arlingallagher

    arlingallagher

    Messages:
    29
    Likes Received:
    1
    Joined:
    Nov 6, 2005
    Had head resurfaced, valves shimmed, new timing belt, new head gasket. Triple checked timing. Now it overheats at idle, any ideas woud be apreciated. Thanks.

    Water pump didnt need to be changed.
     
  2. KLF

    KLF Frame waxer SILVER Star

    Messages:
    6,920
    Likes Received:
    1,387
    Joined:
    Apr 5, 2003
    Location:
    Southern NH
    Did you backfill the engine with coolant when putting it back together?
     
  3. KliersLC

    KliersLC

    Messages:
    3,453
    Likes Received:
    269
    Joined:
    Oct 14, 2004
    Location:
    Virginia Beach, VA
    Fan Clutch.


    I'd put a dollar on it.


    Dan
     
  4. arlingallagher

    arlingallagher

    Messages:
    29
    Likes Received:
    1
    Joined:
    Nov 6, 2005
    I don't think it was backfilled.
     
  5. 2ndGenToyotaFan

    2ndGenToyotaFan Ice-Bound Moderator

    Messages:
    9,539
    Likes Received:
    108
    Joined:
    Jan 8, 2006
    Location:
    It's complicated....
    Try parking it facing up a hill and run it for a few minutes, could be an air bubble in the system.
     
  6. KliersLC

    KliersLC

    Messages:
    3,453
    Likes Received:
    269
    Joined:
    Oct 14, 2004
    Location:
    Virginia Beach, VA
    If it only overheats at idle, I don't think that it would be a backfilling problem, but hey, Its worth a try. Checking your fan clutch is easy. Just run it up to temp and open the hood to see if she's pulling air....
    Dan
     
  7. arlingallagher

    arlingallagher

    Messages:
    29
    Likes Received:
    1
    Joined:
    Nov 6, 2005
    fan works fine. It overheats while driving too...
     
  8. KLF

    KLF Frame waxer SILVER Star

    Messages:
    6,920
    Likes Received:
    1,387
    Joined:
    Apr 5, 2003
    Location:
    Southern NH
    I'll try to post this again, maybe 3rd time's a charm...

    Swapped a 3VZ once a few years ago, new water pump, t-stat, radiator. After we got it all buttoned up, started it right up, it idled fine then got really hot. Pulled the top hose off the radiator, steam came out, but the radiator was still stone cold. Hmmm...

    Poured almost a gallon of coolant into the top hose so it backfilled the engine. Hooked the hose back up, started and ran fine after that.

    My theory was that with the water pump and t-stat being so low, no coolant could flow up into the engine from the radiator when we filled it. Even when the t-stat opened, the water pump wouldn't prime, so it got hot. Now I always backfill engines when they are empty, even my 22RE.

    Then about 15 minutes later, the engine sucked a bolt into one of the cylinders. Game over. :-(
     
  9. Jukelemon

    Jukelemon

    Messages:
    2,396
    Likes Received:
    4
    Joined:
    Dec 29, 2003
    Location:
    Louisville, KY
    That should be in the tips and Faq section IMOP!!!
     
  10. arlingallagher

    arlingallagher

    Messages:
    29
    Likes Received:
    1
    Joined:
    Nov 6, 2005
    just tried that a few times, no dice.
     
  11. KliersLC

    KliersLC

    Messages:
    3,453
    Likes Received:
    269
    Joined:
    Oct 14, 2004
    Location:
    Virginia Beach, VA
    T-stat might be in backward....

    Did you replace it?
     
  12. Jukelemon

    Jukelemon

    Messages:
    2,396
    Likes Received:
    4
    Joined:
    Dec 29, 2003
    Location:
    Louisville, KY
    Can you verify that the water pump is working? You could also try taking the T stat out and test it. I did not see where you said it was replaced. Very likely could be the issue or as as Kliers said, just in backwards. Overheating is only caused by a few things.
     
  13. arlingallagher

    arlingallagher

    Messages:
    29
    Likes Received:
    1
    Joined:
    Nov 6, 2005
    turns out the head gaskets were put in wrong side... problem solved. thanks for input.
     
  14. KliersLC

    KliersLC

    Messages:
    3,453
    Likes Received:
    269
    Joined:
    Oct 14, 2004
    Location:
    Virginia Beach, VA
    As in wrong side L to R, or upside down??

    Not too familiar w/ the 3.0 if thats a dumb question....
     
  15. Jukelemon

    Jukelemon

    Messages:
    2,396
    Likes Received:
    4
    Joined:
    Dec 29, 2003
    Location:
    Louisville, KY
    Well, that would do it ( :

    I have always thought that gasket mftrs. should make there gaskets-especially head, sided i.e. in Big Letters............THIS SIDE UP.
     
  16. arlingallagher

    arlingallagher

    Messages:
    29
    Likes Received:
    1
    Joined:
    Nov 6, 2005
    L R, It should specify with arrows instead of L R..
     
  17. KliersLC

    KliersLC

    Messages:
    3,453
    Likes Received:
    269
    Joined:
    Oct 14, 2004
    Location:
    Virginia Beach, VA
    Ahh, the mechanic's Left and right as opposed to the truck's left and right. We have that problem in the 80s section with OME springs. Aus. drivers side, left right etc....
     
data-matched-content-rows-num="2,1" data-matched-content-columns-num="1,4" data-matched-content-ui-type="image_stacked" data-ad-format="autorelaxed">