Hyundai 25110-2G600 Pump Sub Assembly-Coolant

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A failure in the water pump can cause serious engine damage due to overheating. Water pumps are equipped with weep or vent holes. If a failure occurs in the pump seal, coolant will leak from this hole. The water pumps on 2005 and earlier models are located behind the timing belt covers. If you suspect water pump leakage, remove the cover. In most cases, it will be necessary to use a flashlight to find the hole in the water pump by looking through the space behind the pulley, just below the water pump shaft. A slight gray discoloration around the weep hole is normal, while dark brown stains indicate a problem. If the water pump shaft bearings fail, there may be a howling sound at the front of the engine while it is running. Bearing wear can be felt if the water pump pulley can be rocked up and down. Do not mistake drivebelt slippage, which causes a squealing sound, for water pump failure. This can occur on engines with adjustable drivebelts. Spray automotive drivebelt dressing on the belts to eliminate the belt as a possible cause of the noise.

Non-toxic coolant is available at local auto parts stores. Although the coolant is non-toxic when fresh, proper disposal of used coolant is still required. Disconnect the negative battery cable and drain the cooling system. For 2005 and earlier models, remove the timing belt covers and the timing belt. If working on a four-cylinder model, remove the water pump pulley and fasteners. Pry the water pump off if necessary. For 2006 and later models, loosen the water pump pulley bolts and remove the drivebelt. On four-cylinder models, remove the exhaust manifold and the water pump pulley. Remove the water pump fasteners and pry the water pump off if necessary. On four-cylinder models, also remove the water inlet pipe nut/bolt. To install, clean the water pump and block of any old gasket material or sealant, then clean with lacquer thinner. Install a new gasket and install the water pump. Tighten the water pump bolts and nuts. Refill the cooling system, then run the engine and check for leaks and proper operation.