Subaru 21111AA280 Water Pump Complete

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Drain the cooling system and disconnect the radiator and bypass hoses from the water pump. Remove the cooling fans, drivebelt cover, drivebelts, timing belt, and crankshaft pulley. Remove the timing belt tensioner, idler pulley(s), and on turbo models, the CMP sensor and left side camshaft sprockets. Remove the left side rear timing belt cover and belt tensioner bracket. Loosen the water pump bolts, remove the pump and gasket, and clean the engine mounting surface. Ensure bolt threads and engine holes are corrosion-free. Compare the new and old pump, apply sealant to the new gasket and install it on the pump. Apply RTV sealant to bolt threads, align the pump and gasket on the engine, and tighten the bolts in 1/4-turn increments. Reattach hoses, refill the cooling system, and check drivebelt tension.

Attach the hoses to the pump and tighten the hose clamps securely. Refill the cooling system and check the drivebelt tension.

Drain the cooling system and disconnect the radiator hose and bypass hose(s) from the water pump.

The worn-out impeller shaft bearing can sometimes be confirmed by wiggling the water pump drive pulley.

The water pump is located at the front of the engine.

Coat both sides of a new gasket with gasket sealant.