Mechanics

LEAKING COOLANT

2005 GMC Sierra

Engine Cooling problem
2005 GMC Sierra V8 Two Wheel Drive Automatic 100000 miles

We figured out the water pump needs to be replaced. Any info for torquing the bolts on the install. Info on sealing the thermostat within the housing and water pump. Thanks a lot.
Avatar
Texasprobmxer
January 14, 2010.



Let me know if this helps. It is for a 4.8, 5.3, 6.0, 6.2 V8.

If you have someting different, let me know.

1.Remove or disconnect the following:

Air outlet duct
Coolant
Inlet radiator hose from the water pump
Upper fan shroud
Cooling fan and clutch assembly
Drive belt
Radiator outlet hose from the coolant pump
Surge tank hose
Heater hose
Water pump


http://www.2carpros.com/forum/automotive_pictures/249084_water_1.jpg



Fig. Exploded view of the water pump assembly-4.8L, 5.3L, 6.0L and 6.2L engines

To install:

NOTE
DO NOT use cooling system seal tabs (or similar compounds) unless otherwise instructed. The use of cooling system seal tabs (or similar compounds) may restrict coolant flow through the passages of the cooling system or the engine components. Restricted coolant flow may cause engine overheating and/or damage to the cooling system or the engine components/assembly.

1.Install or connect the following:

Water pump. Install the water pump bolts. Tighten the water pump bolts first pass to 11 ft. lbs. (15 Nm); tighten the bolts final pass to 22 ft. lbs. (30 Nm).
Water pump drive belt pulley and bolts (if applicable). Tighten the pulley bolts first pass to 89 inch lbs. (10 Nm); tighten the bolts final pass to 18 ft. lbs. (25 Nm).
Surge tank hose
Heater hose
Outlet radiator hose to the coolant pump
Drive belt
Cooling fan and clutch assembly
Upper fan shroud
Inlet radiator hose to the water pump
Air inlet duct
Coolant

Installed water pump as instructions state. Great results, thanks again 2carpros. Com

Tiny
Texasprobmxer
Jan 23, 2010.