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Old 04-03-2011, 09:28 AM
jmonck jmonck is offline
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Join Date: Feb 2011
Posts: 49
Default coolant/thermostat question..

Can anyone tell me if thermostats open against coolant flow or with it. Also, is there such a thing as a weak or sluggish thermostat? My temp gauge makes some pretty wide swings between being on the throttle or coasting/cruising. It moves slowly but reliably up and down when I'm on or off the gas. Coolant is fresh and clean. I just bought the truck and the radiator was close to empty. It's definitely full now, but decreasing slowly. I think the head gasket is leaking, but I'm trying to address that in another post. Just curious about the thermostat right now. I'm hoping thats all it is. '93 4.0 OHC 4wd ~250K
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1994 2.3L 2wd 5spd...just won't Die!
On Deck: 1993 4.0L 4x4 auto... hopefully
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