Water Pumps

How do you replace the water pump on a Toyota Previa?

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September 29, 2005 11:40PM

Howdy, the watr pump is located next to the aux driveline

attachemnt on the front end of the motor. Locate the point where

the aux driveline attaches to tne engine, just toward the passenger

side of the vehicle you will see a large water hose(2 inches

diamter). This hose is attached to the water pump. Drain cooling

system, or, disconnect the hose from the water pump carefully.

There is plenty of coolant in the system and you may get a bath. If

you can catch the coolant in a clean container, you can probably

re-use the coolant. There is also a small hose attached to the

pump, remove that one from the pump as well. Remove the bolts that

hold the pump to the engine. Usually the pump is stuck to the

engine, don't pry the pump off as you may damage the joining

surfaces. Use a block of wood and a small hammer to break the seal.

Carefully. After the pump is removed from the engine, there is a

cover on the pump that is retained with two bolts, remove the

cover. Before installing the new pump, there are two o-rings on the

engine where the pump mounts that need to be replaced. Spend the

extra dollar or two to replace these these, it will save a world of

hurt later. The new pump should come with a new o-ring that mounts

around the the housing on the pump where the drive for the pump

engages with the engine. This one too should not be overlooked. To

install, make sure mounting surfaces on pump and engine are clean

and dry including o-rings(no oil grease, water etc). install the

pump and gasket to the engine. Torque specs: short bolts 14 ft lbs,

long bolts, 21 ft lbs. thermostat housing bolts, 15 ft lbs. By the

way, as long as you are messing with the pump, this is a good time

to change the thermostat. Another one of those "ounce of

prevention". You may email me direct about Previa's. If I know, you

will, if I don't.... please be patiient rockman@rockrounds.com

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