Installation Procedure

Important:  In order to prevent leakage, thoroughly clean all parts and sealing surfaces.

1. Install the thermostat.
   Fig 1: Thermostat (4.3L)

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2. Install a new gasket or O-ring.
3. Install the water outlet housing to the lower intake manifold.
   Fig 2: Water Outlet Housing (4.3L)

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   NOTE: Refer to FASTENER NOTICE .
4. Install the water outlet housing mounting bolts.

   Tighten 

   Tighten water outlet housing mounting bolts to 19 N.m (14 lb ft).

   Fig 3: Water Outlet Housing Mounting Bolts (4.3L)

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5. Install the throttle body bracket to the throttle body.
6. Install the throttle body bracket nuts.

   Tighten 

   Tighten the throttle body bracket nuts to 10 N.m (89 in lb).

7. Fill the cooling system. Refer to Draining and Filling Cooling System .
8. Inspect for coolant leaks.
   Fig 4: Throttle Body Bracket & Nuts (4.3L)

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