coolant

  1. B

    How does the cooling system work?

    First time owning a heavier duty truck, just curious to learn how the coolant/radiator system works. The coolant tank was damn near bone dry but the radiator has coolant and the gauge isn't showing any overheating. so obviously this isn't like a car, right where you just monitor the coolant...
  2. W

    Mixing coolant?

    I have a 92 K2500 with a 5.0. When I bought it, it had only green coolant. I put a new radiator and hoses in but I’m unable to do a coolant flush at the moment. I purchased this coolant concentrate from menards. I also got some distilled water to dilute the concentrate to 50/50. The new coolant...
  3. hilly101111111

    Cooling/Radiator/Over Pressure

    My truck is a 1990 GMC k2500 with a TBI 350 I have a few questions for you guys. Long story short I replaced my radiator for the 3rd time because it's a cheap Chinese one and I can get them for free under warranty. The Pressure blew out the cheap plastic drain plug. Anyway I also replaced my...
  4. GMT400N00B

    *Solution Pending* Overheating issue, can't figure it out.

    Longish post, been doing a lot to chase this problem. So I want to give as much detail as I can. Ok, so I just purchased this 1990 GMC K1500 350 TBI about 2 months ago and have been chasing this ever since. Long story short: previous owner deleted the aluminum heater hose that goes to the...
  5. W

    Coolant drain and fill

    Just got my truck and not sure of the service history. It has 75,000 miles but definitely a farm truck. I was wondering what a coolant drain and fill would look like. Not sure if simply pulling the petcock and draining the radiator then filling it would be enough or if there is more. Also, our...
  6. T

    1996 C1500 with 5.7 Vortec Running Cold

    Hi I've got a 1996 c1500 with 5.7 Vortec and about a month ago the thermostat got stuck closed and it was overheating and then I replaced the thermostat with a stock 195° Thermostat and now my motor will warm up to the 195-200 then the thermostat will open then it stays at around 155° and no...
  7. Char

    K1500 Suburban Coolant Flushing

    I recently bought this 1999 Suburban with a 5.7L Vortek, I have been stalking the forum learning lots from you all. I am not too experienced with auto work, trying to learn I’m working on changing the fluids, first of all the coolant, which was low (reservoir empty), and lots of sludge in...

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