Water Pump Replacement

Tiny
ADU
  • MEMBER
  • MAZDA 626
1995 Mazda-626 V6 135,000miles.
What are the steps to replacing the water pump?
What tools will I need to do this?

Thanks,
Adu
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Wednesday, December 20th, 2006 AT 11:15 AM

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Tiny
MATHIASO
  • MEMBER
The exact design of the water pump and it location vary slightly from engine to engine.
In some engines the water pump is driven by the engine's drive belt, while in others the pump is driven by the engine's timing belt. Since each vehicle is slightly different, you usually need to refer to the vehicle's service manual to determine the exact procedures needed to remove and replace the water pump; but I can help you :

1- drain the coolant fromthe system
2-if the pumhas radiator hose attached directly to it, loosen the hoseand remove it from the pump and / or any other hose attache to the water pump.
3- if the radiator fan is attached to the water pump loosen the retaining bolts with an appropriate wrench and remove the fan
4 -Loosen the tension on the belt and remove the belt from the engine.
5using an appropriate wrench remove the bolts that hold the pump housing to the engine, in many cases the lengh of the bolts varies pay attention to them.
5-After all bolts have been removed, remove the water pump from the engine.
6-When the old pum is off the negine, clean any leftover gasket material from the area
- compare the new water pump with the one you just remove from the engine, they must be same

7- reverse the disassembly steps to complete the job.
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Wednesday, December 20th, 2006 AT 11:53 AM
Tiny
COSMO
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There are alot of tools you require to do a water pump on a V6 626 motor. 10, 12, 14, 19, 21 mm wrechs and sockets. And impact (1/2) gun.

Lots of 1/4 3/8 extensions.

The whole job takes about 4-5 hours in my Mazda shop.

Its really not for the do-it yourself kinda person.

You will alos need to remove the timing belt to get to the water pump (the pump is behind the belt).

Also you need to know what to look for in the way of a loose timing belt tensioner (they are famous for being loose at such and old age).

Good luck if you try it yourself, but I would leave this one to the professionals.

Cosmo. Mazda Tech
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Wednesday, December 20th, 2006 AT 11:57 AM

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