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Engine Temp gets hot when towing

Discussion in '2nd Gen. Tacomas (2005-2015)' started by steveoh, May 15, 2012.

  1. May 19, 2012 at 9:15 PM
    #41
    extremachn1

    extremachn1 I am an asshole, deal with it!

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    Yea, I am looking at was to try to bring this temp down. Engine ice, electric pusher fans, cooler thermostat, etc. I already have a higher psi radiator cap. I also have a broken fan shroud I will be replacing when I get home as well.
     
  2. May 19, 2012 at 9:39 PM
    #42
    AllMountainToy

    AllMountainToy Well-Known Member

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    Same here. I tow a 5000lb wakeboard boat in hot conditions and my needle doesn't move. I towed a 22' travel trailer without issue. Might be due to the tow package.
     
  3. May 19, 2012 at 9:46 PM
    #43
    extremachn1

    extremachn1 I am an asshole, deal with it!

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    No, its because the needle dosent move until you overheat. You temp is changing when you tow, you just don't notice it. We are basing out temps off using a scan gauge/ultra gauge to monitor actual coolant temp.
     
  4. May 19, 2012 at 9:50 PM
    #44
    iroh

    iroh Well-Known Member

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    Thankfully most of us use a 50/50 coolant mix in a self-pressurizing system. That combination pushes the boiling point to well over 250F.

    For what it's worth, the stock thermostat doesn't even crack open until 185F.
     
  5. May 19, 2012 at 11:03 PM
    #45
    monkeyface

    monkeyface Douchebag, or just douche if we're friends

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    The shroud is a big deal.
     
  6. May 19, 2012 at 11:17 PM
    #46
    monkeyface

    monkeyface Douchebag, or just douche if we're friends

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    Sounds like you're really pushing the engine to it's limit. Overheating happens when you do that, no big surprise.
     
  7. May 19, 2012 at 11:23 PM
    #47
    monkeyface

    monkeyface Douchebag, or just douche if we're friends

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    extremach1 sounds like he's really pushing the motor to it's extreme.
     
  8. May 20, 2012 at 12:05 AM
    #48
    MountainEarth

    MountainEarth Well-Known Member

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    Yeah get an Ultragauge. Nice to have a digital temp readout. On the UG, I've never gotten over 194 degrees. 188 is my norm.
     
  9. May 20, 2012 at 2:52 AM
    #49
    extremachn1

    extremachn1 I am an asshole, deal with it!

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    Yea, I am hard on my engine, but also AZ has some pretty extreme temps. I do keep a close eye on it and having talked with others that have pushed there engines harder I seem to be ok. As long as the coolant system can keep the temp from going about 225-230 I should be fine.

    As for the shroud, its on my short list of things to fix as soon as I get back. I have the shroud, I just don't feel like pulling all my skids, fan, and other stuff out. I have to do it though or eventually pay the price.
     
  10. May 20, 2012 at 7:50 AM
    #50
    BlueT

    BlueT Well-Known Member

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    Few facts From FSM:
    Thermostat opens at 183F
    It's fully open at 203F
    So 212F does not sound too bad considering it's AZ and supercharged truck. I would think Tacoma can handle more than that. I am pretty sure Toyota coolant when new should be good until 265F so there is room.
    For those looking at highetened temps. Try washing radiator with soap and power washer to clean oily gunk that acts like insulator.
     
  11. May 20, 2012 at 7:52 AM
    #51
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    230* is the max temp an engine should get. Cooling ability dramaticly drops off after that temp, and the engine can over heat.
     
  12. May 20, 2012 at 8:32 AM
    #52
    extremachn1

    extremachn1 I am an asshole, deal with it!

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    Well it makes sense than if the thermostat isn't fully open until 212 and I sit at 220-225 under heavy offroading load than. Not saying I like it but... We will see once I get my shroud replaced and with my new high pressure radiator cap to see if it makes any difference.
     
  13. May 20, 2012 at 8:48 AM
    #53
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    The radiator cap wont make a difference, unless the old one is blowing steam. The shroud will make the most difference though.
     
  14. May 20, 2012 at 8:59 AM
    #54
    hitmans.army

    hitmans.army Just a guy.

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    One problem with the Tacomas and towing is the fan. While it will work well with the ac off, the additional heat from the AC while towing will not be cooled off all that well with just the stock fan. Personally, I am going to put on an electric fan with thermostatic and AC switch activation. I am however debating on the layout, if I want to add 1 fan and keep the stock, or remove stock and add 2 (one that is thermostatic only and one that is thermostatic and ac switched. Which will have nominal HP and mileage gains as well from removal of the mechanical drag from the fan.)
     
  15. May 20, 2012 at 9:08 AM
    #55
    extremachn1

    extremachn1 I am an asshole, deal with it!

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    Ug, here we go again. Chris, keep your temper. LoL

    On the electric fan note, I have thought of doing a "pusher" style set up on the front of the radiator stack when offloading and towing in the heat. Not sure how well this would work if at all.
     
  16. May 20, 2012 at 9:36 AM
    #56
    hitmans.army

    hitmans.army Just a guy.

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    Lol. Mainly I just want to get rid of that dang pink spacer.
     
  17. May 20, 2012 at 10:03 AM
    #57
    joes06tacoma

    joes06tacoma Well-Known Member

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    Yep, if the dealer had to put the hitch on, OP does not have factory tow package. But he still shouldn't be having these problems with such a small boat in tow.

    Something's wrong. Is it overheating on the freeway? In town? We've had similar issues with my dad's Dodge Dakota.....in his case it turned out to be a clogged radiator. It could also be a lazy fan clutch (more noticeable in town, usually), bad water pump, etc.

    Toyota did not design this truck to run hot with a small load like that. Customers don't put up with it. Even without the tow package, you should be able to tow 3500 pounds without stressing over the temp gauge.
     
  18. May 20, 2012 at 10:46 AM
    #58
    BlueT

    BlueT Well-Known Member

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    I recheck the bottle and actually working range for coolant is up to 265. My other number was wrong . So 230 may be boiling point on old coolant and bad cap. Otherwise 265 is absolute last number. You see 265 drive to junkyard
     
  19. May 20, 2012 at 11:32 AM
    #59
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    A pusher would work well, provided we have the room. I had a pusher fan on my Dodge, and it kept it cool, even when working the hardest.
     
  20. May 20, 2012 at 11:53 AM
    #60
    05RedTaco

    05RedTaco Nom Nom Nom

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    Something is wrong... I have 1000lbs of tools in the bed of my truck at all times + camper shell and two ladders on top, A/C usually always on full blast (living in AZ) and I tow a single axle trailer 7x10 usually once or twice a week. Even with the trailer loaded with 1000 to 2000lbs my temp gauge never moves above normal...
     

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