Question about 1988 Mazda B2200

2 Answers

1988 b2200 is overheating--we've changed out the lower radiator hose, thermostat, and the upper hose is fine. Why is it overheating? Radiator, heat pump, or water pump?

Posted by valerieann19 on

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Danny Faulk

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  • Contributor
  • 10 Answers

!st check and make sure the water is flowing in the radiator, then check
the timeing, Mazda will run hot if the timeing is rong.

Posted on Oct 29, 2012

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danoyachtcap

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  • Mazda Master
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If your engine is overheating, Try this procedure:

  • Dirt and debris can get lodged in the radiator air flow paths. This can block the radiator and cause your engine to overheat and damage the engine.

  • The thermostat can be stuck close. If you feel the upper hose very hot and the lower hose cooler than normal, it may be a stuck thermostat.

  • Make sure the radiator and the overflow bottle are filled to the proper levels.

  • Bleed air from the coolant system:This is best done by running the engine with the radiator cap off until you see when the air bubbles stop coming up.

  • Check the radiator fans: The easiest way is to turn on the cars air conditioner and turn up the A/C fans. Both radiator fans should come on when the A/C starts

  • Make a pressure test by using a pressure testing tool (available at most auto parts stores). Use the pressure shown on your radiator cap. Most cars are 16 PSI or less, so don't exceed that pressure. Replace the radiator cap if it doesn't hold the pressure.

Posted on May 09, 2015

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3 Related Answers

Marvin Thornbrue

  • 172 Answers

SOURCE: 1988 mazda b2200 a little hose is leaking from the

This is going to be a thermostat bypass gose, which allows some coolant to bypass the thermostat while the engine is coming up to temperature.

Posted on Jan 09, 2010

eric madden

  • 977 Answers

SOURCE: 1999 Protege overheating. Changed thermostat,

if your vehicle has electric cooling fans it could be that they are not working,if this is the case when you are on the freeway you don't need the cooling fans you only need them when the vehicle is not moving as there is no air going through the radiator to keep the engine cool......hope this helps......cheers.

Posted on Jul 21, 2011

John P Schwantes Jr

  • 1509 Answers

SOURCE: My Mazda MPV 1995 is

Nornally the hose will warm up but not hot with a circulating system. the therostae could be installed upside down or be bad. You should install a therostate with a asprin holding it open to circulate the coolant till the cooling system is full and the asprim will disolve as it soaks in the coolant. the air will ciculatre to the top and out and the systrem will be full. the stat will work corectly after the asprim is gone. with air around the stast it might not open and therefore overheat.

Posted on May 14, 2011

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2 Answers

Why is my car overheating?


You might have a clogged radiator. If so replace the radiator. I would first replace the thermostat as it might be bad. When they go bad they usually stay stuck in the closed position. When closed there is no flow of water to or from the radiator. You can check the thermostat by removing it, it is located on your upper radiator hose, the return hose. To check it boil a pan of water and and using a pair of pliers hold the thermostat in the hot water. If the thermostat is bad it will not open. Hope this helps.

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does the upper and lower hoses seem to be the same temp when car begins to overheat? ore the radiator cooling fans coming on before the car overheats? did you pressure test the cooling system and radiator cap? also may want to remove the lower hose and flush the radiator. is the check engine light on and does it run bad?

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1990 z71 keeps overheating, pull over and overflow will be empty when i just filled it, i remove the coolant cap and release the pressure, runs fine then gets overheated again!


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Ok, g35 coupe 06,52k miles Had over heating problem in april 2010,replaced thermostat, all's well. Now Jan 2011 overheating again, noticed upper & lower radiator hoses collapse, changed thermostat...


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.

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Engine was overheating need to know if a tube is supposed to go from the radiator to the engine coolant


you should have one upper radiator hose, one lower radiator hose, a small diameter hose that runs over the top of your radiator starting from the radiator cap going left across the top and then to your coolant reservoir and another from your thermostat housing to the firewall for the heater core the upper radiator hose should also go to your thermostat housing. the lower radiator hose goes to your water pump This hose routing is only for a 4 liter straight 6 I'm not sure about the V8 or the 2.5 liter motors

Sep 24, 2010 | 1995 Jeep Grand Cherokee

1 Answer

1988 mazda b2200 a little hose is leaking from the thermostat housing to im guessing water pump. the hose is skinny n shorter than the hose from radiator to therm housing. what is this called?


This is going to be a thermostat bypass gose, which allows some coolant to bypass the thermostat while the engine is coming up to temperature.

Jan 08, 2010 | 1988 Mazda B2200

1 Answer

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,

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