Engine Coolant Thermostat Replacement (LEA)

Fig 1: Engine Coolant Thermostat

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedures Raise the vehicle by its full height. Refer to Lifting and Jacking the Vehicle . Draining the cooling system. Refer to Cooling System Draining and Filling (LEA) . Disconnect the engine coolant outlet hose and the radiator surge tank outlet hose, from the thermostat housing.
1	Engine Coolant Thermostat Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 10 N.m (89 lb in)
2	Engine Coolant Thermostat NOTE: Loosen the drain bolt at the bottom of the water pump and drain the coolant from the engine block.

Callout

Component Name

Preliminary Procedures

Raise the vehicle by its full height. Refer to Lifting and Jacking the Vehicle .
Draining the cooling system. Refer to Cooling System Draining and Filling (LEA) .
Disconnect the engine coolant outlet hose and the radiator surge tank outlet hose, from the thermostat housing.

Engine Coolant Thermostat Bolt (Qty: 2)

CAUTION:

Tighten
10 N.m (89 lb in)

Engine Coolant Thermostat

NOTE:

Loosen the drain bolt at the bottom of the water pump and drain the coolant from the engine block.