Question about 1998 Chevrolet K1500
160 degrees should be plenty warm enough for the heater to work. Did you make sure all the air was out of the cooling system? You can do this by removing the radiator cap, start the engine and let it arm up. make sure the radiator cap is higher than the engine. This will allow the air to escape through the opening. Use a jack to raise the truck if needed. watch the coolant level. When the thermostat opens the coolant level will probably drop. When it does, pour antifreeze in to bring it back up. Each time the level drop, top it off with antifreeze. Keep doing this until it no longer drops and the coolant is flowing good. If the thermostat closes while you are doing this, the coolant will probably spill over the top of the radiator. If it does, wait for the thermostat to open again and top off with more coolant. When you are satisfied all the air is out of the system, put the cap back on and see if the heater is blowing any warmer.
Posted on Jan 02, 2011
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Posted on Jan 02, 2017
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