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Hi. My 1999 Mazda 626 v6 is overheating but here's the thing both fans work thermostat is new water pump good, but the temp gage is not going above normal it stays right in the normal position even if car overheats . I have replaced temp sensor but temperature gage is still not going above normal but car still overheating bcuz water starts tk boil. Please help

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  • 84 Answers

The ports in the block could be cloged not letting the coolent flow completley threw and its getting to hot

Posted on Nov 16, 2014

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: 1990 Subaru Liberty Overheats

Hi,

I had the same problem with my 1993 Liberty LX. Remove the thermostat (located inside bottom radiator hose engine connection - take the connection off and thermostat is inside). Reassemble (minus thermostat), reconnect bottom hose. Slowly (very, very slowly) refill the radiator and remove the bleed plug ( located beside the top hose connection to the radiator - a black square plug with a phillips head cross in the middle). When the radiator is full and clear water (no air bubbles) is coming out of the bleed point, replace the bleed plug and then the radiator cap.

Run the engine for five minutes (approx) or until normal engine temperature is reached. Allow the engine to cool down and recheck the water level - fill if necessary ensuring that the bleed plug is open and clear water is coming out of that point. Replace Bleed plug and then radiator cap. Run engine for five minutes (approx) and then test dive. If the engine overheats keep filling the radiator until there are no air bubbles coming from out of the bleed point.

This fixed my overheating problem. Good luck and safe motoring.

Posted on Sep 21, 2008

dr_layinlow
  • 60 Answers

SOURCE: overheating problem

sounds like your heater core has gone bad!! Do you smell antifreeze when you run the heater??

Posted on Dec 10, 2008

  • 1214 Answers

SOURCE: 98 328IS OVERHEATING AFTER CHANGING THERMOSTAT

Are you putting the thermostat in correctly? It it will not work backwards.

And to confirm that there isn't a different problem, take the thermostat out all together and see if it overheats.

Engine not fully warming up is not usually caused by the thermostat. Stats usually fail closed, not open.

You will want to check the water temperature sending unit or gauge after verify the water temperature with an external calibrated thermometer. You can attach and insulate the external thermometer to the housing where thermostat is located.


Reply back what you figure out. I will be happy to help you further.

Posted on Feb 03, 2009

  • 260 Answers

SOURCE: 1993 Toyota Tercel overheating when driving only

Make sure the radiator is clear of debris
Try a different coolant. Stay away from the Red stuff
When changinging the thermostant go for a 180 or less. It sounds like your thermostat open when it really heats up. Get a lower thermostat.

Posted on Apr 09, 2009

  • 1 Answer

SOURCE: 2001 Oldsmobile Alero overheating

I have an 02 olds alero (142000) the radiator fans are not working, therefore overheating. I have replaced the thermostat, water pump, coolant, what causes the fans not to work?

Posted on Mar 09, 2010

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Mazda 626 v6 1999 when ac off overheating, if ac on -ok, if ac off 2 fans not works, if ac on 2 fans ok, Ireplace radiator, termastat, relay for fans.


Have you replaced the temperature switch sensors?
Most Mazdas and cars now days have a temperature sensor and a thermostat sensor that will operate the two fans on different temperatures/settings... Good luck!

Sep 27, 2015 | Mazda Cars & Trucks

1 Answer

Mazda 626 is overheating. changed the thermostat twice in 10 weeks Both fans are working;increase temp when Accelerating.tried to bleed air from the system but this model doesn't have a bleed valve.


is coolant circulating in motor/radiator? does radiator top hose get hot when engine has been warmed up? might be water pump, not thermostat. and you do have plenty of antifreeze/coolant in radiator I'm sure.

Aug 25, 2015 | Mazda Cars & Trucks

3 Answers

My 2002 Mazda 626 is overheating! I have already put in a new radiator, a new thermostat, and replaced a hose that had 2 spring coils. Realized the radiator fan closet to the battery (that should go off...


Have you confirmed the water pump is working? If the car is moving at 10-20 MPH you should have enough air going across the radiator to prevent overheating in a moderate climate at this time of year.

May 08, 2017 | 1999 Mazda 626

1 Answer

Over heating- V6 4.0. Fortuner.


check if the thermostat is not faulty

Jan 07, 2013 | 2010 Toyota Fortuner 4.0

1 Answer

Test water pump to see if it's working.


Generally speaking, if it's turning, it's working. Although on rare occasions the impeller can erode, it is very rare. If you bring the car up to temp with the radiator cap off, when the thermostat opens the coolant should start flowing through the radiator. However, if there is an internal problem (like a head gasket), or the radiator is clogged, or there is still air in the system, it may belch out when it comes up to temp, so be careful. You may also check to see that the cooling fans are working if it only overheats while sitting still, I had a 626 with that problem. Let me know how it goes.

Aug 01, 2012 | 1994 Mazda 929

1 Answer

Mazda 626 2001 overheating


Check the cooling fan temp sensor, the fan might be working but it is not getting signal to turn on

May 25, 2017 | 2001 Mazda 626

1 Answer

My mazda 626 is pouring coolant out of the overflow hose. Not overheating. Not sure if temp gauge is working.


Ask a local mechanic to diagnose for you as this could be a thermostat problem but it could also be a head gasket but another problem could be the water pump impeller the plastic impeller comes adrift from the metal drive shaft

Feb 27, 2012 | 2002 Mazda 626

2 Answers

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

I have a 1999 Mazda 626 2.0L that is having a overheating problem. I had pulled over and the radiator cap was cold so was the fluid and there doesn't seem to be any loss of water. I changed out the...


Physically look in the radiator under the cap for coolant level, and check the valve in the cap for sticking. If air is present in the radiator it can't get out, and more coolant can't get in,(from the overflow). Either clean the cap or replace it and check that it is the CORRECT cap.
Radiator fins dirty, clean with a strong stream of water, not high pressure water.
Radiator clogged, have it boiled out, or replace.
Thermostat stuck open or shut, replace it.
Water pump worn out, can no longer move enough coolant, replace it.
Fan shroud broken or missing....
Electric Fan(s) not working, Check the fan, relay, fuse and engine temperature sensor's.
Belt driven fan, belt slipping, fan clutch is bad, fan blades have flattened out.

Air dam under front bumper is gone, loose, or broken. It actually has a purpose other than scraping on the driveway or curbs. It forces air up into and thru the condenser and radiator. If it

Aug 17, 2011 | 1999 Mazda 626

2 Answers

2001 Oldsmobile Alero overheating


I think you started out looking in the right places. Replacing the coolant, thermostat, relay and sensor are all fairly inexpensive.

I believe you either have blockage in the system (especially if you're using tapwater), or your water pump may be failing.

I would first either take it to a radiator shop and have them flush the cooling system out thoroughly, or else pick up a chemical flush kit and do it yourself. This involves more than just drain and refill.

If this doesn't work, your next step will probably be replacing the water pump. At almost 200k miles, it's probably about due anyway.

Jun 16, 2009 | 2001 Oldsmobile Alero

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