Question about 2003 Mazda MPV

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My 2003 mazda mpv is starting to overheat again. We had water pump, thermostat, and fan module replaced recently because of the overheating. When I make a stop, it starts to overheat. When I hit the freeway or anywhere that allows the car to move, it cools down. We also turned on our AC but should that be the cause of it? I'm frustrated and don't know what else could be making it overheat?

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  • Contributor
  • 17 Answers

There will be a sensor to activate the cooling fan possibly in the radiator. I would be looking at this

Posted on Jan 27, 2012

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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johnjohn2
  • 5763 Answers

SOURCE: 1996 chrysler concorde keeps overheating, there's

have your thermostant checked frist, then coolant fan sensor, if every thing checks out good then have a block test done.

Posted on Oct 02, 2009

  • 6 Answers

SOURCE: 1995 mazda mpv over heating

possible blown head gasket

Posted on Nov 13, 2008

goldenglove1
  • 144 Answers

SOURCE: my mazda mpv keeps overheating after i changed the

It could be the radiator is bad. There is a plug located on the bottom of the radiator. Unscrew the plug and let the fluid drain, you should be able to see if there is rust or gunk in the water/antifreeze. Then use a garden hose and put it in the hole used to fill the radiator and let the water run.

Posted on Aug 06, 2010

mycharmingli
  • 389 Answers

SOURCE: already replaced the water pump in my 2003 Mazda

How hot did you run it before you replaced the water pump did you replace the thermostat also. If you ran it reline, blew your hoses, etc... you can have cracked head, warped head, cracked engine block.

Keep in mind rule of thumb if you replace the water pump you have to replace the thermostat also. REMOVE the thermostat and see if it is still over heating.....Even if you did replace it the one you got could have been bad.

I have the same vehicle in yard going to start tearing down tomorrow to check for issues.

If you can give me a better description of symptoms I can assist you in narrowing down the problem a little better the more info your provide the better to make a determination as to the steps you need to take to repair.

First is there water in your oil, second is there a thin film of oil in your water??
Again when the motor is running and up to normal temperature before it overheats is the engine pushing water out of of the over flow canister? If so this is a direct indication of blown head gaskets, or warped head/heads, or cracked head/heads from excessive over heating. It could become a very costly venture. Check for cost of repair versus ordering an engine, heads , etc... from www.usedengines.com. They have a very wide range of all types makes, models, etc.... and engine components and parts available for shipping.

Wicked Angel

Posted on Nov 17, 2010

Sean80000
  • 1867 Answers

SOURCE: my mazda mpv 2001 coolant leaking somewhere.

1. External Leaks
You need to get the vehicle to a mechanic to check all flexible coolant hoses, hose connections, around the exterior of the water pump and the entire radiator. To do properly the vehicle also needs to be on a hoist. If there is an external leak you should find coolant dripping from the front of the car while the engine is idling and the cooling system is fully pressurized. However it depends how bad the leak is and it's location.

2. Internal Leak

If coolant is leaking into the engine this is a serious problem and needs to be identified by a competent mechanic. For example, if you have a blown head gasket coolant will blow into the engine and contaminate the engine oil. If you check the oil in the engine's sump it should be completely free from coolant contamination.
You should also check the coolant in the radiator for any signs of oil contamination. If there is coolant in the oil then there will also likely be engine oil which has blown into the engines coolant passages and then mixed with the coolant.
IF you can find traces of coolant in your engine oil (or oil in the coolant) the likely problem will be a blown head gasket and the head on the engine will need to be removed and inspected .

Blown head gaskets are usually a result of an owner allowing the engine to overheat as a result of low coolant level, failed water pump or faulty thermostat. Overheating can also cause major damage to the head on the engine.

Posted on Jan 19, 2011

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2001 Mazda MPV overheats. radiator hose doesnt feel pressurised ie very soft to squeeze. when i put coolant in after 5 mins of driving is backflows out of the reservoir and causes heavy smoking from t


sounds like the radiator is blocked either coolant flow or ext air flow through the matrix the thermostat can get ruined when the system overheats so allways change the stat after a overheat problem GET THE RAD CHECKED FIRST if ok check the coolant pump

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2000 mazda mpv overheating with new water pump and hoses?


Hello,

If you car is still overheating with new water pump and new hoses, there is still a few other things that can cause your over heating problem. Now, by you replacing water pump is good that you took care of one of the main things, however here is some other things to look at.

Number One, is your thermostat. Sometimes the thermostat gets worn out, and will not open and close properly, it is designed to open under a certain temp, but it could be stuck or warn out.

Number two, is check out your radiator, can put under pressure test, but best thing to do is a radiator flush, and see if flows proper. Sometimes the radiator core/coils get clogged.

Number Three. Check to see if your fans are coming on and proper speeds, normally as car gets to a certain temperature, they will kick into high speed.

Last thing, is make sure you have no head gasket leaks, as this could cause over heating, best way to check that, if its not obvious is, pressure test.


My opinion what I would first check, is the water thermostat and then radiator flush, if fan is working.

Thanks Mike.

Sep 08, 2011 | 2000 Mazda MPV

1 Answer

Already replaced the water pump in my 2003 Mazda mpv but my car is still overheating what could be the problem?


How hot did you run it before you replaced the water pump did you replace the thermostat also. If you ran it reline, blew your hoses, etc... you can have cracked head, warped head, cracked engine block.

Keep in mind rule of thumb if you replace the water pump you have to replace the thermostat also. REMOVE the thermostat and see if it is still over heating.....Even if you did replace it the one you got could have been bad.

I have the same vehicle in yard going to start tearing down tomorrow to check for issues.

If you can give me a better description of symptoms I can assist you in narrowing down the problem a little better the more info your provide the better to make a determination as to the steps you need to take to repair.

First is there water in your oil, second is there a thin film of oil in your water??
Again when the motor is running and up to normal temperature before it overheats is the engine pushing water out of of the over flow canister? If so this is a direct indication of blown head gaskets, or warped head/heads, or cracked head/heads from excessive over heating. It could become a very costly venture. Check for cost of repair versus ordering an engine, heads , etc... from www.usedengines.com. They have a very wide range of all types makes, models, etc.... and engine components and parts available for shipping.

Wicked Angel

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possible head gasket do a preasure test on the coolant system to see if it loses any coolant or presure drops and check for leaks hope this helps

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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

May 17, 2009 | 1995 Mazda MPV

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