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Thread: 180 thermostat

  1. #1
    Join Date
    Apr 2008
    Hereford, AZ

    Default 180 thermostat

    If my engine runs better when its cooler, then why bother with a 180? Why not run it open?
    94 GMC C2500 65TD, "F" engine, 4.10 rear, 4L80e, #9 resistor, K&N intake, 180 t-stat, marine inj., 4" Exhaust(no cat)

  2. #2
    Join Date
    Feb 2007
    Baja California Sur Mexico


    It does not run better cold, and cold engine wears out fast.
    Grant H.
    1995 6.5 turbo GMC K2500 extra cab 4x4 pickup, PMD under bumper, mechanical wastegate, 228,000 miles, rebuilt engine, 4.10 diff, 16 mpg
    1994 6.5 turbo GMC K2500 4x4 suburban "F" VIN #9 resistor, PMD in the bumper, mechanical waste gate, 226,000 miles, Positrac 3.73 diff, 17 mpg highway.
    1982 4x4 shortbed 6.2 Chev 260,000 miles untouched motor 17 MPG 4.27 diff. Best thing I ever owned, 21 years.

  3. #3
    Join Date
    Dec 2006
    Hannover, Germany


    Yep, the engine runs better, when its COOLER but it runs like crap and wears out fast when it runs TOO COLD !

    So anything BELOW 150~160F is COLD ! And the engine temp NOT only depends on the water temp. The OIL TEMP is much more important if an engine is fully warmed up or not. So the water is hot, but the oil needs much longer to warm up. Until the oil temp is below 180F , the engine IS COLD !


    Germany ? No thank's ! Anybody here, who offers a job incl. greencard/work permit ? - USA or Canada, it would be a pleasure to immigrate !

    1995 Chevrolet K2500 Ext.Cab SB, FSD-Cooler, 3" Rancho Suspension Lift, Rancho Add-A-Leaf, Warp Speed Performance 4" Exhaust, Custom K&N Intake, 285/75/R16 BFG All-Terrain with 8x16 Alcoa's, 4x4 Posi-Lok, Deezee Bullbar, Stepbars, Lunarvisor, Roll-N-Lock Bedcover, Softtopper Bed Extender, Truck Nuts and much more ...

  4. #4
    Join Date
    Jun 2008
    Burnet durnet Tx

    Default ...if by...

    ..."running it open" you mean with NO t*'ll have NO water flow...6.5s' have a weirstat...two{2} port seals...when stat is "closed" coolant circulates in block...when stat is"open" coolant circulates between radiator and engine...coolant in 6.5 NEVER stops moving...jd
    ..93 3500HD 200h 4L80E 4.88..11150lbs allatime..88 c.c. w/doug nash 2-sp..camo paint...58 A120 4by IH{old vfd brush trk} 71ford p/u 79 shovel {{{ hooorraaayyy the bus is gone}}} 93 2500 parts truk {gone to that great chrusher in the sky 01 burban{wifes'.."no you can't use mine"}

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