Engine Cooling problem
2002 Chevy Tahoe V8 Two Wheel Drive Automatic 150000 miles
I started to drain the coolant system for a system flush and could only get about 7 of the 14 quarts in the system to drain out. I poured the coolant back in until I figure out what's up, and the system shows to be full.
What do I need to do other than removing the reservoir cap and opening the drain valve?
I removed the upper radiator hose and it did not help.
I started the engine and ran it until the engine reached temperature - still nothing additional came out beyond a trickle.
I started this exercise because the system started running about 245 F under highway loads, and I thought the thermostat was stuck. Is the trickle I'm getting the flow through the thermostat air bleed valve?
How should the draining normally be done?
Sunday, May 10th, 2009 AT 10:50 PM