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  1. #1
    Sr. Apprentice Z28Johnny's Avatar
    Join Date
    May 2009
    Salt Lake City

    Default What temperature does your engine run at?

    My 96 Suburban ran at 210 all the time with the 7.4, towing or not. I sold it and just got a 01 Yukon XL 8.1. It runs around 175 degrees 90% of the time and it got up to maybe 190 when towing up some steep hills. Is this normal? It seems too low. I'd rather have it too low than too high, but it just seems too low.

  2. #2
    stephan's Avatar
    Join Date
    Sep 2010
    Far West, Oregon USA,
    Blog Entries


    180 deg F in summer, except when towing 6,000 lb. boat up hills, then raises to 195-200 deg F, but I have an all aluminum radiator that is better & larger than stock GM, & also put in 2 electric fans, (one thermostatically controlled, & one manually controlled).
    I have a Stewart Warner mechanical guage so it's accurate to the extreme.
    Winter time I switch to a 195 thermostat & it stays at 195 F due to cold days.
    Factory electrical guages aren't so accurate, so you may be running a bit warmer than it shows.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol

  3. #3
    murdog94's Avatar
    Join Date
    Feb 2008
    Cloquet, Minnesota, United States
    Blog Entries


    As long as you are running from 180-210 you are fine with the factory guages... If you think that you are a little to cool you might consider upgrading to a 195 new T-stat.


    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  4. #4



    2006 Duramax LBZ
    Edge Evo
    4'' Diamond eye to 6'' tip
    16'' ion alloy, 33'' fierce attitudes
    Lots of work left to do!

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