Engine Cooling problem
2000 Chevy Blazer Four Wheel Drive Automatic
My blazer stoopped throwing warm air the other day and blew antifreeze. We looked and looked and chould not find any leaks. It usually runs just under 210 and when ti got hot it went up to about 230. I pulled over and looked under the hood. Definately no antifreeze left and I knew this much because of the no heat issue. We added antifreeze and looked for leaks. Nothing. We called my husbands father who is a retired mechanic and he said it sounded like the thermostat got stuck. So now my husband needs instructions on the removal and replacement of the thermostat. I had the entire cooling system replaced in 2006 so Im hoping it is just the thermostat. Hoping you can help. I do need the blazer to go back and forth to work about 20 minutes each way the next couple of days and I am keeping a close eye on the temp. Just crossing my fingers it doesn't happen again before it can get fixed.
1.Remove the necessary coolant from the radiator. Refer to Draining and Filling Cooling System.
2.Remove the air outlet duct. Refer to Air Cleaner Outlet Duct Replacement.
3.Remove the throttle body bracket. Refer to Throttle Body Assembly Replacement.
4.Remove the thermostat housing mounting bolts.
5.Remove the thermostat housing from the lower intake manifold and set aside.
6.Remove the gasket or O ring.
7.Remove the coolant thermostat.
8.Clean all the sealing surfaces of the coolant outlet.
9.Clean the sealing surface on the lower intake manifold.
Important: In order to prevent leakage, thoroughly clean all parts and sealing surfaces.
1.Install the coolant thermostat.
2.Install a new gasket or O ring.
3.Place the thermostat housing on the lower intake manifold. Ensure the gasket or O ring is in correct position.
Notice: Refer to Fastener Notice in Service Precautions.
4.Install the thermostat housing mounting bolts.
*Tighten thermostat housing mounting bolts to 19 Nm (14 ft. lbs.) .
5.Install the throttle body bracket. Refer to Throttle Body Assembly Replacement.
6.Fill the cooling system with specified coolant and concentration. Refer to Draining and Filling Cooling System.
7.Install the air outlet duct. Refer to Air Cleaner Outlet Duct Replacement.
8.Inspect all sealing surfaces for leaks after starting the engine. Refer to Cooling System Leak Testing (On-Vehicle) or Cooling System Leak Testing (Off-Vehicle).