How to Change the Water Pump on Toyota Cars

by Contributing Writer; Updated June 12, 2017

As is typical of all vehicles in the Toyota car stable, the Toyota car does not require a great deal of maintenance, but certain systems need regular maintenance checks. One that is critical to vehicle operation is the cooling system. If you find that your Toyota car is no longer cooling as it should or your engine light is coming on under load, a bad water pump may be the culprit. Replacing the water pump on a Toyota car is not difficult.

Under The Hood:

 How to Change the Water Pump on 2000 Toyota Camry

Removal

Disconnect the car's negative battery cable.

Drain the engine coolant by placing a large container under the radiator drain and opening the drain fitting; you may need pliers to open the fitting and a 3/8 inch diameter hose on the fitting. Repeat this at the engine block drain plug.

Remove the timing belt--this requires you to remove the right front wheel, coolant overflow tank, drive belts, spark plugs and alternator. Turn all sprockets and cylinders to the Top Down Center position.

Unbolt and remove the Number 1 and Number 2 idler pulleys if the car has a four cylinder engine; this will require an Allen wrench. Remove the camshaft sprockets on a V6 engine.

Remove the alternator adjusting bar on a four cylinder engine by removing its bolt with a flare-nut wrench. If the car has an engine oil cooler, unbolt and disconnect the air conditioning compressor without disconnecting its refrigerant lines.

Disconnect the bolt connecting the water inlet pipe to the alternator adjuster on a V6 engine, then remove the inlet pipe and thermostat. Remove the Number 3 timing belt cover by releasing the wiring harness clips and pulling the harness back.

Remove the bolts for the water pump and remove the pump. Take note of where each bolt is located, especially if the bolts are of different lengths. If the pump is stuck, tap it with a soft-face hammer.

Installation

Clean off all the sealing surfaces using lacquer thinner or acetone, removing all traces of the old gaskets, sealer and O-rings.

Install the replacement water pump with a new gasket, sealer and O-rings. Tighten the bolts to 78 inch-pounds on a four cylinder engine and 69 foot-pounds on a V6; tighten them in several even steps.

Reinstall the timing belt and all the other engine parts in the reverse order of removal.

Refill the engine coolant at the radiator; use an fresh mix of water and antifreeze if the old coolant is contaminated.

Items you will need

  • Container

  • Pliers

  • Ratchet wrench

  • Allen wrench

  • Flare nut wrench

  • Water pump

  • Gasket

  • Sealant

  • O-rings

  • Antifreeze

 How to Replace the Water Pump in a Toyota Camry

1MZ-FE Camry Engine

Disconnect the negative cable on the car battery before you begin. You need to wait at least 90 seconds before beginning the process of removing the water pump after disconnecting the battery cable.

Place a drain pan underneath the radiator. When the engine is cool, drain the cooling system from the radiator into the pan.

Remove the timing belt and the #2 idler pulley. Take off the 3 clamps from the rear timing belt cover and remove the engine wire. Then take off the rear timing belt cover and remove the water pump from the engine.

Add liquid sealer to the gasket to the water pump, the water pump itself and the engine block. Install the new water pump, tightening the bolts to 53 inch pounds (6 Nm). Install the rear timing belt cover, tightening the bolts to 74 inch pounds (9 Nm).

Reconnect the engine wire and the 3 clamps to the rear timing belt cover and reinstall the #2 idler pulley, tightening the bolts to 32 foot pounds (43 Nm).

Line up the knock pin on the camshaft with the knock pin hole on the camshaft pulley while the flange side of the right-hand camshaft pulley is facing outward. Insert the bolt and tighten to 65 foot pounds (88 Nm).

Line up the knock pin on the camshaft with the knock pin hole on the camshaft pulley while the flange side of the left-hand camshaft pulley is facing inward. Insert the bolt and tighten to 94 foot pounds (125 Nm).

Attach the timing belt and reattach the negative battery cable. Refill the cooling system with coolant to the proper levels. Start the engine and check for leaks when the engine reaches normal operating temperatures.

2AZ-FE Camry Engines

Disconnect the negative cable on the car battery before you begin and drain the coolant from the radiator.

Remove the RH front wheel, the RH fender apron seal, the RH engine stay brackets and engine stay, the Engine stabilizer control rod and alternator, the water pump pulley and assembly.

Install a new gasket onto the water pump and attach the water pump assembly, tightening the bolts to 80 inch pounds (9.0 Nm).

Attach the water pump pulley, the alternator, the engine stabilizing control rod and mounting bracket, the engine mounting stay and the right front apron wheel along with the seal.

Attach the timing belt and reattach the negative battery cable. Refill the cooling system with coolant to the proper levels. Start the engine and check for leaks when the engine reaches normal operating temperatures.

 How to Replace the Water Pump in a Toyota Highlander

Remove the Water Pump

Disconnect the negative cable on the car battery before you begin.

Place a drain pan underneath the radiator. When the engine is cool, drain the cooling system from the radiator into the pan.

Take out the alternator.

Loosen the water pump pulley bolts and take out the water pump pulley.

Remove the water pump from the engine.

Install the Water Pump

Insert and install the new water pump, tightening the bolts to 80 inch pounds.

Reinsert the water pump pulley, making sure to tighten the bolts to 19 foot pounds.

Reinstall the vehicle's alternator.

Refill the cooling system with coolant to the proper levels. Start the engine and check for leaks when the engine reaches normal operating temperatures.

 How to Replace the Water Pump in a Toyota Tacoma

1GR-FE Tacoma Engine

Disconnect the negative cable on the car battery before you begin. Remove the four retaining bolts and take out the number 1 engine undercover assembly when dealing with the 4WD and the PreRunner.

Place a drain pan underneath the radiator. When the engine is cool, drain the cooling system from the radiator into the pan.

Take out the left side of the radiator support to frame seal and remove the V-bank cover.

Remove the fan shroud and the air cleaner assembly. Remove the water inlet after disconnecting the two oil cooler hoses. Also disconnect the radiator and the five water bypass hoses.

Loosen and remove the five bolts along with the water inlet. Take the o-ring out of the water outlet pipe and take the gasket out of the water pump. Loosen and remove the two bolts to the number two idler puller subassembly and remove the subassembly.

Take the alternator out and remove the mounting bolt to separate the suction hose subassembly and the air conditioning compressor. Disconnect the connector to the air condition compressor and loosen and remove the four bolts to separate the belt tensioner assembly and compressor to remove the belt tensioner assembly.

Loosen and remove the retaining bolts to the water pump and remove the water pump. Clean the gasket mounting surfaces and install a new gasket to the water pump before installing the water pump. Tighten all the short bolts to 80 inch pounds and the long bolts to 17 foot pounds.

Install the belt tensioner assembly then continue installing the rest of the components in reverse order. Refill the cooling system and reconnect the negative battery cables. Start the engine and check for leaks when the car is at normal operating temperature.

2TR-FE Tacoma Engine

Disconnect the negative cable on the car battery before you begin. Remove the four retaining bolts and take out the number one engine undercover assembly when dealing with the 4WD and the PreRunner.

Place a drain pan underneath the radiator. When the engine is cool, drain the cooling system from the radiator into the pan.

Take out the left side of the radiator support to frame seal and remove the V-bank cover.

Remove the fan shroud along with the alternator. Loosen and remove the three bolts to the belt tensioner assembly and remove the assembly.

Remove the retaining bolts to the water pump and take the pump out of the engine.

Clean all the gasket mounting surfaces before installing a new gasket and putting in the new water pump. Tighten all short bolts to 15 foot pounds and the short bolts to 80 inch pounds.

Reinstall the belt tensioner assembly, tightening the first bolt to 30 foot pounds, the second to 16 foot pounds and the last to 32 foot pounds.

Reinstall the rest of the components in reverse order, then refill the coolant to the engine and reconnect the negative battery cable. Start the engine and check for leaks when the engine reaches regular operating temperatures.

 How to Replace the Water Pump on a RAV4

Park the vehicle on level ground in a safe area so that you have full access to the undercarriage of the car. Crawl under the right side of the RAV4 and locate the timing belt cover--the metal, oblong silver or black cover--on the lower front portion of the engine. Use the socket wrenches to remove the mounting bolts of the timing belt cover.

Slide the timing belt cover off the studs and locate the water pump directly behind the cover. Use a screwdriver to remove the bolts on the hose clamps on either side of the water pump.

Slide the hoses off the pump and use the liquid catch pan to catch any liquid that runs out. Use the socket wrench to remove the two mounting bolts holding the water pump in place.

Pull the old water pump out and insert the new water pump in its place. Secure the mounting bolts and then slide the hoses back in place.

Replace the timing belt cover and then turn the car on. Be sure to run water from a hose into the radiator to assist in bringing the coolant level back to a safe level.

Items you will need

  • Liquid catch pan

  • Socket wrenches

  • New water pump

  • Flathead screwdrivers

 How to Replace the Water Pump on a 1995 Toyota Camry

Turn off the engine, and leave it to cool. Open the hood, and use a wrench to remove the clamp bolts from the battery terminals. Lift both the positive and negative cables from their respective terminals.

Place a drain pan underneath the radiator drain plug. Once the pan is in place, remove the drain plug from the radiator. Drain the coolant from the radiator in to the pan. Once the radiator has been emptied, reattach the plug and put the drain pan in a safe area.

Use a wrench to loosen the bolt that attaches the clamp to the lower radiator hose. Remove the clamp from the radiator hose. Disconnect the hose from the water pump. Locate the injection pump pulley. Remove the bolts from the pulley, and lift it from the vehicle.

Locate the water pump, and use the nut driver to remove the seven mounting bolts. Remove the two injection pump holding nuts. Remove the water pump and its gasket from the vehicle.

Fix the new water pump gasket to the water pump. Place the water pump in the same position from which you removed the old one. Fix the water pump in place by attaching the mounting bolts. Reinstall the injection pump pulley by attaching it to the engine with the mounting bolts. Attach the lower radiator hose to the new water pump. Place the clamp around the hose, and tighten the bolt to fix the clamp in place.

Open the radiator cap, and pour coolant back into the radiator. Close the radiator cap. Reattach the battery cables to their respective battery terminals, and fix them in place by tightening the bolts against them. Turn on the engine to check that the water pump now works correctly.

Items you will need

  • Wrench set

  • Nut driver

  • Drain pan

  • Replacement water pump

  • Water pump gasket

 How to Replace the Water Pump in a Toyota Tundra

4.7L TundraEngine

Place a drain pan underneath the radiator and drain the cooling system from the radiator into the pan.

Disconnect the negative battery cable.

Remove the timing belt, the #2 idler pulley and disconnect the bypass hose and the radiator hose from the water pump.

Remove the water inlet housing assembly.

Loosen and remove the water pump bolts and take the water pump out of the engine, discarding the gasket and o-ring.

Install the new water pump with a new gasket, tightening the mounting bolts to 15 foot pounds (21 Nm) and the stud nut and bolt to 13 foot pounds (18 Nm).

Attach the water inlet housing assembly with a new o-ring, tightening the bolts to 13 foot pounds (18 Nm).

Reattach and reinstall all remaining components in the order that they were removed.

Reconnect the negative battery cable. Refill the engine's cooling system with coolant. Start the car and check for leaks when the engine reaches normal operating temperature.

4.0L Engine

Disconnect the negative battery cable and loosen and remove the five bolts to the #1 engine undercover sub assembly.

Place a drain pan underneath the radiator and drain the cooling system from the radiator into the pan.

Take out the V bank cover, the drive belt, and the fan assembly and shroud.

Detach the ventilation hose #2 and take out the air cleaner assembly. Also detach the water inlet, the two oil cooler hose with the oil cover and the radiator and bypass hoses.

Loosen and remove the five water pump bolts and remove the water pump, discarding the O-ring and gasket.

Take out the two bolts to the idler pulley sub assembly and remove it from the engine along with the alternator.

Take out the mounting bolt to the suction hose sub assembly to the air conditioning compressor. Detach the air condition compressor connector and take out the four bolts to separate the belt tensioner assembly and the compressor. Take out the belt tensioner assembly.

Loosen and remove the water pump bolts and remove the water pump from the engine.

Clean all the mounting surfaces and install the new water pump with new gasket, tightening the first set of bolts to 80 inch lbs and the second to 17 foot pounds.

Reinstall the belt tensioner assembly and all remaining components in the order in which they were removed.

Reconnect the negative battery cable. Refill the engine's cooling system with coolant. Start the car and check for leaks when the engine reaches normal operating temperature.

3.4L Engine

Disconnect the negative battery cable and remove the engine undercover.

Place a drain pan underneath the radiator and drain the cooling system from the radiator into the pan.

Take out the upper radiator hose.

Stretch the power steering belt and loosen the mounting nuts to the fan pulley. Loosen the following bolts: lock, pivot and adjusting. Then remove the drive belt.

Loosen and remove the idler pulley nut and its adjusting bolt to remove the air conditioning belt.

Remove the bolts listed above and take out the alternator drive belt, the #2 fan shroud with its clips and the fan with the pulleys and coupling.

Move the power steering pump to the side without disconnecting the lines. Also move the compressor from the engine and move it without disconnecting the lines. Remove the air conditioning bracket if applicable.

Remove the six bolts to the timing belt cover and remove the #2 timing belt cover.

Take out the #1 cylinder to the TDC (Top dead Center) of the compression stroke and the camshaft timing pulleys.

Remove the thermostat and disconnect the #2 cooler hose from the pump.

Loosen and remove the seven water pump bolts and remove the pump, discarding the o-ring and gasket.

Clean all mounting surfaces and install the new water pump with a new o-ring and gasket, tightening the bolts to 14 foot pounds. (20 Nm). Make sure to use sealant when installing.

Reinstall or reconnect all components in the order in which they were removed.

Reconnect the negative battery cable. Refill the engine's cooling system with coolant. Start the car and check for leaks when the engine reaches normal operating temperature.

Items you will need

  • Drain pan

  • Wrench set

  • Coolant

 How to Replace the Water Pump in a Toyota Corolla

1ZZ-FE Corolla Engine

Disconnect the negative cable on the car battery before you begin.

Place a drain pan underneath the radiator. When the engine is cool, drain the cooling system from the radiator into the pan.

Remove the right-hand engine under cover with the drive belt.

Loosen and remove the bolts to the water pump and take the water pump out of the engine.

Install the new water pump. Tighten the short bolts to 80-inch lbs. (9 Nm) and tighten the long bolts to 96 inch pounds (11 Nm).

Reinstall the drive belt and the right engine under cover.

Reconnect the negative battery cable.

Refill the cooling system with coolant to the proper levels. Start the engine and check for leaks when the engine reaches normal operating temperatures.

2zz-Ge And 2zz-FE Corolla Engines

Disconnect the negative cable on the car battery before you begin.

Place a drain pan underneath the radiator. When the engine is cool, drain the cooling system from the radiator into the pan.

Remove the right-hand engine under cover and the drive belt.

Loosen the bolts and remove the water pump pulley and the water pump.

Equip the new water pump with a new o-ring and attach the water pump to the engine, tightening the bolts to 80 inch pounds (9 Nm).

Reattach the water pump pulley, tightening the bolts to 11 foot pounds (15 Nm).

Attach the drive belt and the right engine under cover.

Reattach the negative battery cable. Refill the cooling system with coolant to the proper levels. Start the engine and check for leaks when the engine reaches normal operating temperatures.

About the Author

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