Chevrolet 15127056 Blade, Fan

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The vehicles covered in this check are equipped with viscous fan clutches. For safety purposes, it is important to remove the key from the ignition switch. The check begins with a visual inspection, specifically inspecting the fan blades for cracks or damage. Any fan that shows signs of either should be replaced. Next, wiggle the fan blade from side to side and ensure that there is 1/4-inch or less play in the fan. If there is excessive play, the clutch should be replaced. Additionally, inspect the clutch for signs of leakage and proper tightness to the water pump. If leakage is present, the clutch should be replaced. Turn the fan blades and note the resistance, which should be less with a cold engine. Drive the vehicle until the engine is warmed up, then shut it off and remove the key. Turn the fan blades again and note the resistance, which should have a noticeable increase. If the fan clutch fails this check or is locked up solid, replacement is indicated.

Start by partially draining the cooling system and removing the upper radiator hose. If the vehicle has a V8 engine, also remove the air filter housing.

To remove the radiator fan from a vehicle's cooling system, start by partially draining the cooling system and removing the upper radiator hose. If the vehicle has a V8 engine, also remove the air filter housing. Next, unclip the air conditioning hoses from the fan shroud and remove the clips at the left and right junctures of the upper and lower fan shroud section. Pull the upper shroud from the clips at the side brackets. Finally, remove the fan clutch hub from the water pump by turning it counterclockwise. To install the fan, first unbolt it from the clutch if necessary and then tighten the fan-to-clutch bolts to the specified torque. Reverse the removal steps to complete the installation. Finally, check the coolant level and add more if needed to bring it to the appropriate level.