Originally Posted by gmc1990rodder
surely need the t-stat try 195 degree second did u reverse flush the cooling system? its simple to do even if the engine isnt running...assuming u have a heater disconnect one hose,attach a water hose and a lil duck tape to hold in place lol turn on the water w/radiator cap off water should folw out off the top...if not try the water hose on the opposite heater hose... also did u dran the block by the to plugs on the bottom?? after u pull the plugs out and have no water flowing ouy of them..insert a small screwdriver thru the rust until it flows.... after u turn the water on allow to run thru system until it runs clear
They make plastic t-valves for this, I've got one in my car. You cut a section in the line where it goes to the heater core and clamp it in. It's got a threaded cap, and with an adapter you can screw on a garden hose. It makes flushing the coolant nice and easy.