here's the procedure on how to replace water pump of your car
the belt tensioner pulley counterclockwise on the 3.4L modeal. Use a
breaker bar and a socket to rotate the center bolt on the tensioner
pulley. If you have a 3.5L engine model, turn the pulley clockwise.
Slide the drive belt off the steering pump pulley.
Detach the black ground cable from the battery using a wrench.
Position a drain pan under the car in the direction of the steering pump hoses.
Move any wire brackets near the steering pump out of the way using a wrench or ratchet and socket, if necessary.
Disconnect the return hose from the power steering pump by
loosening the clamp at the steering pump using a ratchet and socket.
Then pull the hose off the pump and let the steering fluid drain into
Detach the pressure hose from the steering pump by unscrewing
the retaining nut at the pump using a tube wrench. Let the steering
fluid drain on the pan.
Unscrew the steering-pump mounting bolts using a ratchet, ratchet extension and socket.
Lift the power steering pump off the engine compartment.
Install the New Steering Pump
Position the new steering pump in place and start the
mounting bolts by hand. Then tighten the bolts using the ratchet,
ratchet extension and socket.
Attach the pressure hose to the steering pump by starting the retaining nut by hand. Then tighten the nut using the tube wrench.
Connect the return hose to the steering pump. Then tighten the clamp using the ratchet and socket.
Reinstall any wire brackets you had to remove using a wrench or ratchet and socket.
Connect the black ground cable to the battery using a wrench.
Install the drive belt by turning the tensioner pulley
counterclockwise using the breaker bar and socket. Then slide the belt
over the steering pump pulley. If you have the Aztek 3.5L engine, turn
the tensioner pulley clockwise.
Reinstall any wire brackets you had to remove form near the steering pump using the wrench or ratchet and socket.
Connect the black, ground cable to the battery using a wrench.
Bleed the Power Steering System
Refill the steering fluid reservoir with new steering fluid. Make sure the level reaches the Full Cold mark on the reservoir.
Raise the front of the vehicle using a floor jack until the front tires are off the ground. Then support the car on 2 jack stands.
Turn the ignition key to the On position but do not start the engine.
Turn the steering wheel fully from left to right 15 times.
Check the fluid level in the steering reservoir and add if necessary.
Lower the vehicle and start the engine. Turn the steering
wheel and listen for steering noises. If you hear noises while turning
the steering wheel, repeat steps 2 through 5 of the bleeding procedure
to get rid of the air in the steering system. Turn off the engine.
the dealer should be able to make you a key, all you need is the vin number,they can make a key for it, as loong as the ignition in the van is the one that came with the van, if it was replaced then they cant make one, if you didnt by van new then just have key made its mostlikely its original one, hope this helps.
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The only squared thing on the pump is the "plastic"
fluid tank... Everything else about the design & function
There is ABSOLUTELY circular "MOTION" inside the PUMP...
PLEASE NOTE... there is a giant pulley on the front..
and the design of the pump is all about rotational force of the hydraulic pump (right THROUGH the middle).
High pressure to the high pressure...
(with a possible cooler option in the middle)
Low pressure back to the reservoir
It could be a split in the radiator or the pump leaking or a blown head gasket would also pump water out of the radiator. Refill it with water and run the engine with the radiator cap off. If there is a dribble coming from the pump it needs to be replaced. If a large amount of bubbles come from the radiator, and blow water all over the place, suspect a blown head gasket.