Chevrolet Silverado / GMC Sierra. Service manual — part 1629

FAN REPLACEMENT (MECHANICAL)

Tools Required

J 46406 Fan Clutch Remover and Installer

Removal Procedure

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 63: Using Special Tools For Fan Clutch
Courtesy of GENERAL MOTORS CORP.

1. Remove the upper fan shroud. Refer to Engine Coolant Fan Upper Shroud

Replacement (Mechanical) or Engine Coolant Fan Upper Shroud Replacement
(Automatic Transmission - Diesel).

2. Install the J 46406 to the fan clutch.

Fig. 64: View Of Fan Assembly Removed
Courtesy of GENERAL MOTORS CORP.

3. Remove the fan hub nut from the water pump in a counterclockwise rotation.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 65: View Of Fan Clutch & Fan Blade
Courtesy of GENERAL MOTORS CORP.

4. Remove the fan clutch bolts from the rear of the fan blade.

5. Separate the fan clutch from the fan blade.

Installation Procedure

CAUTION: Do not use or attempt to repair a damaged cooling fan

assembly. Replace damaged fans with new assemblies. An
unbalanced cooling fan could fly apart causing personal
injury and property damage.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 66: View Of Fan Blade & Fan Clutch
Courtesy of GENERAL MOTORS CORP.

1. Install the fan clutch onto the fan blade.

2. Install the fan clutch bolts

Tighten: Tighten the bolts to 23 N.m (17 lb ft).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Cooling - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado