Temp 3/4 way high, fan growling

Discussion in 'Engine & Drivetrain' started by treehan77, Oct 8, 2019.

  1. treehan77

    treehan77 TYF Fiend

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    Spent 2 mi it’s on the ramps and it made a good size puddle right away. I guess I’m glad it’s coming out onto the ground as opposed to “disappearing” into the motor. Is water pump the consensus? Couldn’t see it coming out anywhere while it was running, but it’s covered with dexcool everywhere.

    8824A5A2-C695-40A9-BE2A-2FDF7D53A351.jpeg 47A56F15-E87E-4E99-A6B1-3057CCD38743.jpeg 9FCBA6D7-EADA-4BAB-A3C4-1E374A5AD139.jpeg
     
  2. treehan77

    treehan77 TYF Fiend

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  3. BG1988

    BG1988 Full Access Member

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    thermostat not opening all the way, can cause it to run at 3/4 temp ..
     
    Last edited: Oct 8, 2019
  4. PNW VietVet

    PNW VietVet Full Access Member

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    Drips on the linkage looks like water pump leak and I would never ever change a water pump without doing the thermostat at the same time.
     
  5. iamdub

    iamdub Hold on... Lemme overthink this for a bit...

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    Easy job. Check the coolant crossover hoses under the throttle body, too.
     
  6. Chris2144

    Chris2144 Full Access Member

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    Agreed can be done in an afternoon. Flush it clean it new pump and thermostat bleed it and you're good to go
     
  7. treehan77

    treehan77 TYF Fiend

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    Does on 05 have this still?
     
  8. treehan77

    treehan77 TYF Fiend

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    Ok, for a 2005 Yukon 4.8, can anyone tell me which of these I Need-
    ACDELCO 252845 or 251743?

    anything else? Do I need a new housing or something?
     
  9. PNW VietVet

    PNW VietVet Full Access Member

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    I would use the 251743 Water Pump-AC Delco, 131156 Thermostat-AC Delco and the 35720 seal by Fel-Pro.

    The AC Delco parts are OE equivalent and I love Fel Pro quality.

    All available at Rock Auto

    Because I am so OCD I would also run a nice clean tap in the mounting threaded holes to clean them out before reinstalling the mounting bolts.

    I don't see that the water pump comes with the gasket/seal. Seal-Fel Pro #35633

    Gasket-Fel Pro #35635 or AC Delco #251663
     
    Last edited: Oct 9, 2019 at 6:49 PM
  10. treehan77

    treehan77 TYF Fiend

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