GM 89018168
Thermostat

In gas models, you should first remove the Thermostat Housing when replacing the coolant Thermostat. Next, take out the Thermostat. After placing the new Thermostat in the right spot, put the Thermostat Housing back in place.

The engine coolant Thermostat Housing replacement (LY2, LH6, LY5, LMG, LY6) tool should be used to start the Thermostat Housing retrieval process. Next, take out the Thermostat. Follow the engine coolant Thermostat Housing replacement (LY2, LH6, LY5, LMG, LY6) () instructions to place the new Thermostat while you reinstall the Thermostat Housing.

Start the Thermostat replacement task by partially draining the cooling system through the cooling system draining and filling (GE 47716) procedure. Follow the documented Intake Manifold replacement (SFI) instructions to remove the upper Intake Manifold. At first disconnect the surge tank outlet pipe from the Thermostat then take out the coolant pipe/Thermostat housing bolt and the upper coolant pipe bolt . Disconnect the coolant inlet pipe from the Thermostat before unfastening the Thermostat bolts . Afterward remove the Thermostat by discarding the Thermostat seal . Install the new Thermostat with a new Thermostat seal by following the 10 nm (89 lb in) torque recommendations when tightening the Thermostat bolts. The coolant pipe installation requires new sealing material and fasteners (2 and 7). Additionally the surge tank outlet pipe needs to connect to the Thermostat. Reinstall the upper Intake Manifold after performing cooling system filling through the cooling system draining and filling (GE 47716) standard.

To replace the Thermostat, one would first have to remove the Thermostat Housing then removing the Thermostat. For installation, fit in the Thermostat in its position and refit the Thermostat Housing.

Start by draining the engine coolant from the cooling system to replace the engine coolant Thermostat. Portfolio evaluation requires a cooling system flush with subsequent replacement of Water Pump and Thermostat when oil contamination exists in the cooling system. Move the outlet hose clamp away from the inlet side of the Water Pump before removing the outlet hose from its inlet connection. The next step requires removing both Water Pump inlet bolts before the Water Pump inlet can be taken out. The o-ring seal runs through the Thermostat Housing so it needs to be extracted. When installing the Thermostat Housing you should first ensure both an o-ring seal fits properly into its designated groove. Attach the Water Pump inlet (with Thermostat) then tighten its bolts to 15 nm (11 lb ft). Secure the outlet hose to the Water Pump inlet then place the outlet hose clamp on the water outlet. Finally, fill the cooling system.

Begin by draining the cooling system to replace the Thermostat on a 4.3l engine. Loosen the air cleaner outlet duct clamp on the mass airflow/intake air temperature (MAF/IAT) sensor, then, remove the positive crankcase ventilation (PCV) hose and the air cleaner adapter nut. Lift up the air cleaner outlet duct till the hinge clip is released from the lip within the Throttle Body hence repositioning the inlet hose clamp to the water outlet and taking off the inlet hose. Next, take out the water outlet studs and the water outlet and then the Thermostat. Clean sealing surfaces of both water outlet and Intake Manifold and throw the old o-ring seal. For installation, fit a new o-ring seal on the Thermostat and install it, then the water outlet. Install the water outlet studs and tighten them to 25 nm (18 ft. Lbs.). Reconnect the inlet hose to the water outlet and the location of the inlet hose clamp. The second step is to slide the bolt through the hole, align the hinge clip with the Throttle Body lip and turn the air cleaner outlet duct down into the position where the nut mount goes onto the air cleaner adapter and the pcv hose. Tighten the clamp of the air cleaner outlet duct on the maf/iat sensor to 4 nm (35 inch lbs.). Finally, fill up the system for cooling and check for leaks.

In gas models, you should first remove the Thermostat Housing when replacing the coolant Thermostat. Next, take out the Thermostat. After placing the new Thermostat in the right spot, put the Thermostat Housing back in place.

Engine coolant Thermostat (LU3) replacement starts with the water outlet tube removal followed by the water outlet and Thermostat removal. The installation process begins with cleaning both the water outlet surface and intakes manifold surface and removing the existing o-ring seal for disposal. Start Thermostat replacement by mounting a fresh o-ring seal before adding the Thermostat component. Follow this order for installation by adding the water outlet tube followed by the water outlet and finishing with the water outlet tube.

The procedure to replace engine coolant thermometers starts with housing removal followed by direct removal of the Thermostat on ly2, lh6, ly5, ly6 or l92 engines. Install the new Thermostat as the second step before reinstalling the Thermostat Housing.

Begin by draining the cooling system to replace the Thermostat on a 4.3l engine. Loosen the air cleaner outlet duct clamp on the mass airflow/intake air temperature (MAF/IAT) sensor, then, remove the positive crankcase ventilation (PCV) hose and the air cleaner adapter nut. Lift up the air cleaner outlet duct till the hinge clip is released from the lip within the Throttle Body hence repositioning the inlet hose clamp to the water outlet and taking off the inlet hose. Next, take out the water outlet studs and the water outlet and then the Thermostat. Clean sealing surfaces of both water outlet and Intake Manifold and throw the old o-ring seal. For installation, fit a new o-ring seal on the Thermostat and install it, then the water outlet. Install the water outlet studs and tighten them to 25 nm (18 ft. Lbs.). Reconnect the inlet hose to the water outlet and the location of the inlet hose clamp. The second step is to slide the bolt through the hole, align the hinge clip with the Throttle Body lip and turn the air cleaner outlet duct down into the position where the nut mount goes onto the air cleaner adapter and the pcv hose. Tighten the clamp of the air cleaner outlet duct on the maf/iat sensor to 4 nm (35 inch lbs.). Finally, fill up the system for cooling and check for leaks.

First, remove the Thermostat Housing when changing the engine coolant Thermostat. Next, take out the Thermostat. Place the new Thermostat first and then rehouse it in its position.

Starting the replacement process requires removal of the Thermostat Housing. Next, take out the Thermostat. During installation place the new Thermostat into its position before reinstalling the Thermostat Housing.

Connect the surge tank outlet pipe.

Reattach the outlet hose to the water pump inlet and position the outlet hose clamp at the water outlet.

Clean and inspect both the thermostat housing and the sealing surface of the engine block.

Take out the thermostat.

Reinstall the generator and fill the cooling system with the specified coolant and concentration.

No, the thermostat is not serviceable separately; the water pump inlet and thermostat must be replaced as an assembly.

Secure it with the clamp and reinstall the generator.

First, drain the cooling system.

Clean all surfaces of the thermostat housing and the sealing surface of the engine block.