Hi, as you look at the belt it will rotate to the front of the car. hope this was some help all the best.
SOURCE: water pump replacement in a 2002 Mazda MPV
The reason is the water pump is driven off the timing belt, extra parts and allot more labor. No the eng does not have to be removed, labor time around 4 hours, parts about, about $125 US for parts, if it is a dealer add $75 US
SOURCE: mazda mpv 2000 water pump
It' on the driver's side. Under that little belt cover just to the left[looking at it] of the batteryand foward of the intact plumbing.
SOURCE: 3 liter mazda mpv overheating
You probably never cleaned the cooling system out.
If you have not get it done by pros.
It seems something is blocking the flow. If the water pump went bad you will know. Rarely ever heard a impeller breaks off like you think. The bearings and the seal break first.
Check and see also if the heater valve is working.
As for the over heating even new thermostats fail. Reverse flush is needed or the procan measure the pressure in the radiator cooling system and edetermine if there is a engine pressure problem. Tools and experience is the key in the game of diagnosis.
wfg8.com
SOURCE: changing water pump mazda mpv 2000 lx
Whatever you do, do NOT bring it to the dealer as most dealers will charge upwards of $650 for what I did in about 2 hours of work in my driveway with a 10 mm wrench and a gasket scraper.
I am not sure how technical an answer you need but basically it is as easy as removing the serpentine belt (a picture of the routing is located under the hood for future reference), loosening the bolts that hold the pump into the housing, carefully removing the remainder of the gasket (I recommend buying a gasket tool which will prevent gouging the housing while removing the gasket) placing the new gasket on the new water pump and bolting the new pump on. Route the serpentine belt and check the top off the antifreeze. Start the engine and check for leaks.
My part (which was ridiculously simple, just a pulley, bearing and PLASTIC 'impeller') cost was $60 and I was refunded $10 when I brought the bad one in.
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