cooling system

  1. 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...
  2. S

    Thermostat Fitment

    Hi all this is my first post and i’m having some thermostat fitment issues, i have a 93 k1500 truck with a non vortec 5.7. and i’ve tried multiple thermostats and thermostat gaskets from autozone and advanced auto, and with no avail every single one of them move around within the little circle...
  3. KCusick81

    Cooling system flush questions

    Hey everybody, So after an arduous few weeks of burning the candle at both ends, working 10-12 hour days, prepping my house to go on the market, waiting for parts and fighting daylight, I've finally completed the install portion of my repairs. Today I began the process of flushing the cooling...
  4. chriscg

    Fan clutch use and advice.

    Maybe this should be in the stupid questions thread. But im nut sure. Jut lookng for some peace of mind. My fan clutch comes on a soon as you take off after starting and howls like crazy. It goes away after a minute or two. if I'm using my ac it will howl after every stop sometimes, then go...
  5. McSweeney

    Weird cooling system cool down vortec 5.0

    I have a 1997 c1500 5.0 vortec and after running the truck and shutting it down i get bubbles in the reservoir from the overflow hose from the rad. It only happens when the truck shuts down, and i dont actually lose any fluid. Its almost like a quarter of a quart just pushes back out of he...
  6. Angelo

    No radiator cap on 1996 6.5L. How to drain and how to fill

    Probably a dumb question. I read that this must be a fully pressurized cooling system since there is no radiator cap on either side, only at the overflow reservoir. What would be the procedure to refill with coolant? I see a bleeder valve at the top of the radiator hose. Do I turn out the...
  7. Angelo

    1996 6.5L K3500 thermostat swap from 195 to 190 height/length question

    My truck gets to close to 210 (temperature) on the highway. It has a single thermostat. I pulled it out and it is a 195. I was looking to swap that to a 190. The gasket was in bad condition anyways, so doesn't hurt to do this now. I realize it may still reach close to 210 once open, this is more...
  8. R

    '91 350 TBI cooling system weirdness

    Changed thermostat and hoses, trying to bleed the cooling system with a spill free funnel (already tried with just the rad cap off on ramps, same result). Anyone have an idea of what's going on?D have much experience bleeding cooling systems, not sure if this is normal. First video is idle with...

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