1996 Mazda 323

Engine Cooling problem
1996 Mazda 323 4 cyl Two Wheel Drive Manual 150000 miles

My Mazda that I have had for the last 5 yrs trouble free as developed a fault leaking water from near the bottom of the engine on the left hand side as you look from the front.
It appears to be leaking from a pulley wheel. Not sure what the pulley is for but it does have a belt that is connected and this wheel does turn but it loses water while the car is stood and while filling it with water.
I have tried putting radiator sealer in the system to stem the flow but it is still losing water. I dont know what the part is to replace it and the car is too good to scrap so I would like to fix it can you help? Thankyou
September 19, 2009.

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