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Overheating on long interstate runs

Discussion in '1st Gen. Tacomas (1995-2004)' started by jbp84, Jun 10, 2021.

  1. Jun 10, 2021 at 5:08 AM
    #1
    jbp84

    jbp84 [OP] Active Member

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    About a month ago my 3.4 5 speed randomly runs hotter than normal goes 3/4 up on the cluster. Pressure tested found coolant leak from water pump. Replace pump and timing belt. Drive the truck a week around town seems fine. Head back out to local kayak shop about 30 min away up the interstate same exact place temp gauge creeps up again. I went back replace thermostat the old one didn't have the jiggle valve, install a new Stat with the valve at 6 o'clock position. I hook my scanner up at highway driving seem to run at 210-215* the temp gauge still sits in the middle. One thing I did notice I cut the heat on high it will suck about 15* of heat out of it. Kind of torn between a fan or radiator issue since it's dropping so much temp off. Or at 250k it might be due for a set of headgaskets
     
  2. Jun 10, 2021 at 5:19 AM
    #2
    1997tacomav6

    1997tacomav6 V6 5sp,RegCab,TRD Supercharger,2"pulley,meth, 660k

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    Take a really good look at the radiator area BEHIND or INFRONT the AC condenser,

    This is an area where the radiator gets plugged up with dirt because the condenser is sweating on to
    the radiator and plugs that section of the radiator up with dirt.

    You might have to just spend 100 and get a new radiator,

    If you run the engine hot you will get in the danger area of a head gasket
     
    Last edited: Jun 10, 2021
    Truckntran and AmherstAndy like this.
  3. Jun 10, 2021 at 7:13 AM
    #3
    AmherstAndy

    AmherstAndy Well-Known Member

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    If it overheats on the freeway, it's unlikely to be a fan issue.

    You could try @Timmah! 's video for a cheap and easy cleaning procedure that might help:

     
    1997tacomav6 likes this.
  4. Jun 10, 2021 at 3:25 PM
    #4
    jbp84

    jbp84 [OP] Active Member

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    I ordered a radiator for $100 today gonna see how it does after that
     
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  5. Jun 10, 2021 at 7:59 PM
    #5
    Philrab

    Philrab Curator of useless knowledge

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    Bunch of Basic Taco mods.
    Consider new hoses while you’re in there, coolant flush, and burp the Heck out of it.
     
  6. Jun 10, 2021 at 8:58 PM
    #6
    1997tacomav6

    1997tacomav6 V6 5sp,RegCab,TRD Supercharger,2"pulley,meth, 660k

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    You could but in a lower stat in there too
     
  7. Jun 11, 2021 at 4:50 AM
    #7
    jbp84

    jbp84 [OP] Active Member

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    I got a 170 from o'reallys
     
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  8. Jun 11, 2021 at 6:39 AM
    #8
    1997tacomav6

    1997tacomav6 V6 5sp,RegCab,TRD Supercharger,2"pulley,meth, 660k

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    V6 5sp,RegCab,TRD Supercharger, 2" pulley, methanol injected AC TRD supercharger,(MUST DO) TRD supercharger ported, rebuilt 3 times over 500,000 miles, every 125,000- 150,000 needs rebuild Projector headlights HID 5 speed manual Amsoil for all drive train Smaller 2” pulley,(300hp) (MUST DO) 2004 DESNO fuel injectors, zero ping ping, 2004 side door mirrors Dick Cepek Rims, Michelin tires LTX, ( that last 100,000 miles) Now running Dynopro ATM mud and snow tires KN cold air intake Cat back exhaust with ss exhaust tip, Raised exhaust tail pipe to 2" below body line Optima*dry cell battery,red top Alpine sirius radio, 200 watt amp, focal is165 split door pod speakers Focal door speakers Subwoffer behind seat Viper alarm, Electric Locks Dark tinted windows, 4runner bucket seats, Tacoma Rubber floor mats TRD fender extenders, Bilstien shocks chrome push bar, chrome nerf bars, add a leaf for rear springs trailer iv hitch, electric brake control, Drilled slotted brakes, High carbon steel (MUST DO) EBS green stuff 7000 series pads(MUST DO) TRD engine oil cap TRD stick shift, Rear sliding window 2002 4Runner functional hood scoop cut into Tacoma hood, 4Runner dual overhead map light Gentex Auto dim + Compass + Temp, garage,rearview mirror Corbeau bucket seats Snow Methonal kit stage 2 Champion 3 core aluminum radiator Linex bed liner
    I would get the 170 corolla stat from the dealership,

    Mine failed from advanced auto 3 months later,

    The Toyota one is so much better in quality

    29E754F5-F3FB-4335-ACC0-02C4C16AA89C.jpg
     
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  9. Jun 11, 2021 at 6:51 AM
    #9
    Truckntran

    Truckntran Active Member

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    What’s the front of your condenser look like? If it’s all beat up from rocks and road trash it’ll cause your radiator to heat up. Also occasionally hosing out any dirt from the backside will make a big difference in hot weather. When I spent a lot of time on dirt roads I had to do that pretty often. It would significantly drop the highway temperature readings.
    Just be careful of the fins when cleaning out the radiator or condenser. You can use air too but I hesitate to recommend it as it is really easy to flatten all the fins and ruin the radiator or ac condenser. Use low pressure and keep some distance. You may find some parts like the grille and shroud need to be removed to get access for a thorough job.
     
  10. Jun 11, 2021 at 7:39 AM
    #10
    Glamisman

    Glamisman Well-Known Member

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    a picture is worth a 1000 words... I have a post called "Radiator basics", this is exactly what you are experiencing.
     
  11. Jun 11, 2021 at 11:25 AM
    #11
    skeezix

    skeezix Well-Known Member

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    Tell me about it... A few years ago I spent the better part of 1.5 hours straightening out the fins after I hosed off the radiator. :annoyed:
     
  12. Jun 11, 2021 at 6:08 PM
    #12
    jbp84

    jbp84 [OP] Active Member

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    Radiator fixed it. Put it in at work gave her a hard 70mph home and stay 192-194
     
  13. Jun 11, 2021 at 6:13 PM
    #13
    Steves104x4

    Steves104x4 Well-Known Member

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  14. Jun 12, 2021 at 6:51 AM
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    Black DOG Lila

    Black DOG Lila Well-Known Member

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