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Warm up on cold mornings

Discussion in '2.5 Gen Tundras (2014-2021)' started by Mp269, Jan 2, 2025.

  1. Jan 2, 2025 at 4:58 AM
    #1
    Mp269

    Mp269 [OP] New Member

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    Hello ,my recently purchased 2015 limited takes a long time to warm up on cold morning,specially the defrosting mode.
    I know it’s a bigger engine but it seems like thermostat might be wrong temp.
    Is that possible?
    Mp269
     
  2. Jan 2, 2025 at 4:59 AM
    #2
    BuzzardsGottaEat

    BuzzardsGottaEat New Member

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    Can you give a rough estimate on a long time so people can compare.

    5, 10, 15, 20 min?
     
  3. Jan 2, 2025 at 6:07 AM
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    MadMaxCanon

    MadMaxCanon New Member

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    Too many, but not enough....
    I live in socal and it still tales a while to warm up. I typically let it get to at least 100 degrees. If you leave the heat off until it warms up it's faster.
     
  4. Jan 2, 2025 at 6:17 AM
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    Red&03Taco

    Red&03Taco YUT

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    Do you mean it takes a while to warm up if you just leave it idling, or it takes a while even after you begin driving?

    I usually let mine warm up about 30-60 seconds, and then drive off, but drive it pretty gently until the coolant temp gets to normal, and this usually only ends up taking about a couple minutes.

    Just idling it'll take forever
     
  5. Jan 2, 2025 at 6:23 AM
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    pvn.beluga

    pvn.beluga New Member

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    Since switching to 5w-30 in New England with 20* weather, I usually let it sit for a bit until I see oil temps reaching above ambient. Then I’ll take it slow.
     
  6. Jan 2, 2025 at 10:12 AM
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    Mp269

    Mp269 [OP] New Member

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    At a cold start idling takes at least 10-15 minutes to get defrost to start working. My 4 cylinder is much quicker.
     
  7. Jan 2, 2025 at 10:34 AM
    #7
    Red&03Taco

    Red&03Taco YUT

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    If you have to park outside of a garage, I'd suggest getting one of those windshield blankets. Then you can start driving well before the coolant is warm enough for the defroster to be effective, and the whole truck will be warm much quicker overall. It'll pay for itself in fuel savings.

    Your 4 cylinder probably holds much less coolant and therefore heats that smaller volume much quicker.
     
  8. Jan 2, 2025 at 2:40 PM
    #8
    frichco228

    frichco228 Valued Member

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    Much can depend on the actual temp and moisture in the air, but I generally get some defrost happening in 5 min. 10 min idle is enough to get warm enough to start ice melt effectively.

    But, ANY idle time for a v8 Tundra absolutely kills your average MPG for the tank of gas. Idling just a few times, few minutes each will bring down tank average MPG by 1MPG or more. Tundras just suck fuel at cold idle.

    But you have to do what is needed and sometimes defrost/defog before driving is required :spending:

    Tundras heat up to operating temp fastest by starting, then driving immediately, careful and light throttle until temps come up.
     
    Ebrperk and HulkSmurf14 like this.
  9. Jan 2, 2025 at 2:49 PM
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    Wynnded

    Wynnded What MPG...

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    Windshield Blanket (of snow!):rofl:

    PXL_20241127_153609611.RAW-01.MP.COVER.jpg
     
  10. Jan 2, 2025 at 2:51 PM
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    Oolypoolay

    Oolypoolay Meh

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    Thermostat could be stuck open.
     
  11. Jan 3, 2025 at 4:49 PM
    #11
    Jaypown

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    Idling doesn’t do much. Start it up and idle for less than a minute. Then drive easy until you see your needle start to move.

    Don’t rely on defrost. Scrape that window.

    You could always get a scan tool to watch your actual temps to rule out anything wrong. Comparing a half ton V8 to a 4cyl isn’t a direct comparison.
     
    AZBoatHauler likes this.
  12. Jan 3, 2025 at 5:01 PM
    #12
    BushBandit

    BushBandit New Member

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    Get a scan tool to monitor temps to see if your thermostat is working. You can get a cheap Bluetooth one off Amazon

    There's also a Toyota block heater you can order if you want to go that route. I believe most Canadian Tundra's come with them
     
    Wynnded likes this.
  13. Jan 3, 2025 at 7:59 PM
    #13
    snivilous

    snivilous snivspeedshop.com

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    Sounds normal, and your 4 cylinder has a lot less mass and coolant to get warmed up.

    My 6-cyl bed mounted radiator mini truck will take half an hour to maybe reach operating temp in the middle of summer if I leave it idling, not a lot of heat at idle and a lot of coolant. A big V8 is in a similar ballpark.
     
    Wynnded, HulkSmurf14 and AZBoatHauler like this.
  14. Jan 3, 2025 at 10:40 PM
    #14
    HulkSmurf14

    HulkSmurf14 ...Weighted Average...

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    Drive it to warm up faster. Start it, wait for you SAIP to shut off and away you go! They drink too much to just sit, running. The fastest way to warm up is to move!
     
    Last edited: Jan 4, 2025
    snivilous and Sugar’s4x4 like this.
  15. Jan 4, 2025 at 6:52 AM
    #15
    overbeatsunder

    overbeatsunder New Member

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    Having just joined the Tundra family, it is affirming to see the same observation from others. I guess it just doesn't warm quickly at idle.
     
    HulkSmurf14 likes this.
  16. Jan 4, 2025 at 9:47 AM
    #16
    akpowrider

    akpowrider New Member

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    I have to park at the trailhead (at cabin). It’s been around -20F for the last week. The 5.7 warms up much faster than my Silverado. IMG_8680.jpg
     
    HulkSmurf14 likes this.

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