Hello May Fellow Nairalanders
who can help me out.
recently i begin to notice that anytime i engage in reverse, my Mazda MPV 2003 begins to overheat..
but when i switch off the engine and let it cool like 5mins, switch back on... it stops.
i can travel for 7hours non-stop and everything is okay.. but the minute i have a cause to reverse.. the Temperature starts rising.
I have changed my Radiator, removed the Thermostat but the situation still persist..
any ideas on how to deal with this challenge.?
Thank you

Hellustic:
Hello May Fellow Nairalanders
who can help me out.
recently i begin to notice that anytime i engage in reverse, my Mazda MPV 2003 begins to overheat..
but when i switch off the engine and let it cool like 5mins, switch back on... it stops.
i can travel for 7hours non-stop and everything is okay.. but the minute i have a cause to reverse.. the Temperature starts rising.
I have changed my Radiator, removed the Thermostat but the situation still persist..
any ideas on how to deal with this challenge.?
Thank you

Check all hoses.

Preferably, pressure test the system to find leaks

Hellustic:
Hello May Fellow Nairalanders
who can help me out.
recently i begin to notice that anytime i engage in reverse, my Mazda MPV 2003 begins to overheat..
but when i switch off the engine and let it cool like 5mins, switch back on... it stops.
i can travel for 7hours non-stop and everything is okay.. but the minute i have a cause to reverse.. the Temperature starts rising.
I have changed my Radiator, removed the Thermostat but the situation still persist..
any ideas on how to deal with this challenge.?
Thank you

Does it overheat in traffic?
I suspect your cooling fans are rotating in the wrong direction..

Apart from village people, what else could cause this? Na joke o

Seriously, check the fan. Is it a clutch fan or electric fan your multipurpose Van has?

Put your poor thermostat back o... Since you have now seen that it is not the cause of the overheating

Hellustic:
Hello May Fellow Nairalanders
who can help me out.
recently i begin to notice that anytime i engage in reverse, my Mazda MPV 2003 begins to overheat..
but when i switch off the engine and let it cool like 5mins, switch back on... it stops.
i can travel for 7hours non-stop and everything is okay.. but the minute i have a cause to reverse.. the Temperature starts rising.
I have changed my Radiator, removed the Thermostat but the situation still persist..
any ideas on how to deal with this challenge.?
Thank you

Have you tested this car in slow moving traffic?

I am inclined to believe that you have problems with your fans or the fan control module for your ride.

Extensive electrical testing is recommended to rule out the actual cause of the fault.

If the vehicle cooling system fails during reverse, it should also fail during heavy traffic.

Please remediate ASAP.

I'm just thinking whether this has anything to do with that transmission system in reverse?

Is it possible for you to scanned that car, and observed the transmission system temperature (fluid) at reverse, and compared that with when in park, and drive at stationary?

Do you noticed the problem when its in reverse while its idling, or moving?



Regards,
Joseph (08066643532:calls/WhatsApp)
DW Nig Ltd
Isolo
Lagos

TRYGO:
I'm just thinking whether this has anything to do with that transmission system in reverse?

Is it possible for you to scanned that car, and observed the transmission system temperature (fluid) at reverse, and compared that with when in park, and drive at stationary?

Do you noticed the problem when its in reverse while its idling, or moving?



Regards,
Joseph (08066643532:calls/WhatsApp)
DW Nig Ltd
Isolo
Lagos

Sir, with all due respect, kindly ensure that you write in correct English language. It is quite difficult to follow your write-ups.

Smartchoiice:


Sir, with all due respect, kindly ensure that you write in correct English language. It is quite difficult to follow your write-ups.

Cyber bully

thebigkendo:


Cyber bully

Cyberbandit

Smartchoiice:


Sir, with all due respect, kindly ensure that you write in correct English language. It is quite difficult to follow your write-ups.

Respect yourself Man

ugreat:


Respect yourself Man

Cyber bully.

AutoElectNG:


Have you tested this car in slow moving traffic?

I am inclined to believe that you have problems with your fans or the fan control module for your ride.

Extensive electrical testing is recommended to rule out the actual cause of the fault.

If the vehicle cooling system fails during reverse, it should also fail during heavy traffic.

Please remediate ASAP.

Hello... yes.. i travelled to Epe last week and noticed it also overheats during heavy traffic... but during the traffic while it was overheating.. i came out to check the Fan and both were blowing very well..... confused here...

thebigkendo:


Does it overheat in traffic?
I suspect your cooling fans are rotating in the wrong direction..

They are blowing well cos when ever i switch it on, i put paper or nylon at the front of the Bonnet.. it sticks to the body... i just need a mechanic that wil help me out...

Hellustic:


They are blowing well cos when ever i switch it on, i put paper or nylon at the front of the Bonnet.. it sticks to the body... i just need a mechanic that wil help me out...

Now you are left with two other possibilities
-Defective Radiator: Could be dirty, clogged or Bad
-Water pump: Impeller blades might have worn out

Hellustic:


Hello... yes.. i travelled to Epe last week and noticed it also overheats during heavy traffic... but during the traffic while it was overheating.. i came out to check the Fan and both were blowing very well..... confused here...

Did you say fan or fans? During periods of extremely hot weather, both fans should spin.

Remember that I said; If the vehicle cooling system fails during reverse, it should also fail during heavy traffic.

You have confirmed this to be true.

Do your fans come on as soon as you turn on the ignition? If yes, computer engine management has been bypassed, and this maybe the reason for your woes.

Please confirm or disprove.

Is this statement still true? i can travel for 7hours non-stop and everything is okay..

Remember I said something about the fan control module and that is because it has been the subject of a recall campaign for the fan control module to address issues related to the cooling fans either running 24/7 or not running at all or running erratically due to factory soldering errors in the fan control module .

You can confirm or disprove if your vehicle is the subject of this recall and if recall was performed on your ride by visiting https://www.mymazda.com/MyMazda/welcome.action, signing up, inputting your VIN.

You can also learn some more about the recall in question here: http://www.mpvclub.com/recalls.php?id=16

I am inclined to believe your problem is with a failed fan control module or with running the fans direct assuming of course all other parts of the cooling system are running in their stock configurations.

All the best.

You didn't state the period transmission stays in reverse gear before it begins to overheat.

If your thermostat is fine, and your radiator is fine, and your water pump is fine, and there is no leak from any part of the cooling system, then this would be my workflow.

Are all cooling system sensors operating correctly? Mazda MPV 2003 has one engine coolant temperature sensor. Mazda MPV 2000/1 had two. This means conducting continuity and resistance checks.

If yes, are all the relays that control the cooling system operating optimally?

If yes, is everything ok with the fan motors and the fan blades?

If all the above check out, then you have a problem with the fan modules!

It seems you are flying blind, solving problems from symptoms, not from the source of the trouble, check this vehicle for DTCs so you will not take us along with you on this blind flight.

Checking for DTCS should actually have been your starting point.

I guess you have fixed this issue since the complaint has lasted for a while.

My guess is if it overheats when reverse gear is engaged for a while is that you have a clutch that engages on reverse slipping badly.