Lexus 16100-39455 Engine Water Pump Assembly

Non-toxic coolant can be bought at the focal auto parts and is non-toxic only if it is new; used coolant needs to be disposed of properly. First, remove the cable from the negative terminal of the battery and then, drain the cooling system. For 2.4L models, discharge the following parts: right side inner fender splash shield, engine movement control rod and bracket, as well as the engine stay, drive belt and alternation. The water pump pulley has to be loosened first using a pin spanner, then the pulley has to be removed, the wiring harness has to be disconnected from the water pump and the water pump mounting fasteners removed before the pump is pried off the housing. Inspect all sealing area as well and fit the new water pump and fasten the screws up to the recommended torque . Fill the cooling system and operate the engine; see if it leaks. For the 2.7L versions, the procedure is almost similar: first, remove the engine hoods and the belts, as well as the alternator and tensioner unit; then, the water pump and the surfaces should be cleaned. For 3.0L and 3.3L replace the timing belt and camshaft sprockets, the water pump retaining bolts/nuts, clean all the seal surfaces and apply new metal and rubber gasket. On 3.5L models, it is necessary to point out that the water pump can only be removed if disassembling the engine/transaxle assembly, which is located in the engine compartment, and for this you will need a floor jack or an engine hoist. Disconnect the necessary parts of the engine, such as the drivebelt and the engine harness ground connector; to reach the water pump, the mounting bolts must be detached, the surfaces have to be cleaned, a new gasket must be added, and everything must be assembled back; it is also important to fill cooling system and to check for any leakage.

If the water pump is worn out, it can cause overheating of the engine and this may result to severe loss of the engine. The water pumps are equipped with weep or vent hole and if there is a failure with the pump seal, the coolant will seep out of this hole. Some models may require the use of a flashlight to identify the hole since the hole is located in the space behind the pulley just below the water pump shaft. Generally, a slight gray discolouration around the weep hole is normal, in contrast to dark brown stains that point at a defect. In case the water pump shaft bearings are worn out, one will hear a howling sound at the front of the engine when the engine is on, and the bearing wear can be tested by rocking of the water pump pulley vertically. It must be borne in mind not to interchangeability between drivebelt slippage, which gives a squealing noise, and water pump failure; use of automotive drivebelt dressing on the belts can rule out the belt as a source of noise.

Refill the cooling system, run the engine, and check for leaks and proper operation.

Disconnect the cable from the negative battery terminal and drain the cooling system.

INCLUDES PUMP,GASKET AND 2 SEALS