Trying to find out why my 02 mazda mpv is getting hot and the water is boiling in the hoses. ive checked the thermostat its good, had to change the water pump housing it had a broken hose.

SOURCE: car runs hot

Have you bled the thermostat? Remove your top radiator hose from the radiator. Get some water, because you need to pour to water down that hose back toward the thermostat housing. Before you do that find the thermostat bled plug located on the housing. unscrew the plug and pour the water into the hose. when water start coming out of the plug tighting the plug. Replace the radiator hose and top radiator back off with water.

Colin Stickland

• 22516 Answers
• Posted on Dec 22, 2008

SOURCE: coolant problems 2000 vw jetta

plastic impeller on water pump has come adrift

SOURCE: heating problem

If you changed the thermostat yourself and have noted that the lower radiator hose is cooler than the upper radiator hose, you may have installed the thermostat incorrectly or have purchased a faulty thermostat. A lower radiator hose that does not get hot (or as hot as the upper radiator hose) is a direct indication of a faulty thermostat. Please vote for this solution if you found this to be helpful. Thanks,

SOURCE: 2002 dodge 1500 Changed radiator, thermostat, and hoses. No heat

Why was radiator replaced?Did it have heat before ? If it was plugged, the heater core may also be plugged. Try flushing it with a water hose in both directions. I dont know why the botton radiator hose would be cold, the radiator should be a uniform temp and the air coming through the radiator should be HOT, when the engine is at operating temp. What condition was the old coolant? if it was rusty, the water pump may have lower flow than normal.

SOURCE: Ok, g35 coupe 06,52k miles Had

Heres a couple of things you can check. Start your car and remove the radiator cap,(before it gets hot mind you) when it reaches norm operating temp, look inside radiator to see if water is circulating. If its not moving, its a bad water pump. Also, youre hoses should never collapse, if they collapse when they get hot maybe you need new hoses? Finally, if those dont work, flush out your radiator. Open the bottom cockpit and use a garden hose and let it flush out the system while the car is running, about 10 mins should do the trick. If the radiator looks clean inside then it doesnt need flushed.