overheating

waywen · Post by **waywen** » Sun Apr 07, 2013 9:31 am

i have an mx5 that i have recently purchased the problem is running around the temerature is fine ,but when i go out on the open road the temerature increases dramtically.i have had the water pump replaced and thermostat replaced ...the dealer has had the radiator cleaned ....but i still have the same problem can anyone help

Mad Kiwi · Post by **Mad Kiwi** » Sun Apr 07, 2013 9:48 am

I had simialr issues with my number plate being in front of the radiator opening....

Maybe trying with it off or relocated could be a worthy test, if it is in that position.......

I would also ensure you have the pastic undertray installed. From my research, some cars dont respond well to this not being there....I removed mine and made an aluminium undetray so I have a spare you could borrow, possibly have.

Angreal · Post by **Angreal** » Sun Apr 07, 2013 10:02 am

Also check your passenger side radiator fan goes on although when mine died, I found my car would overheat around town and be fine on the motorway.

Sounds like you have your number plate across the opening

waywen · Post by **waywen** » Sun Apr 07, 2013 10:27 am

thank you Mad kiwi that seems to fix the problem

MrGrey · Post by **MrGrey** » Sun Apr 07, 2013 4:52 pm

good to hear, I hope it stays fixed so you can really enjoy your new toy without worrying about mechanical issues

and welcome to the forums!

Toolbox · Post by **Toolbox** » Thu Apr 11, 2013 7:41 pm

If you have a problem with overheating turn on the air con and both fans should start and it will bring the temperature down, but do have it looked at as soon as possible as a engine rebuild is not cheap.

Growler · Post by **Growler** » Mon Apr 15, 2013 1:06 pm

Also check the small radiator under the dash. These can block up and reduce the flow as well...

tomtikki · Post by **tomtikki** » Mon Apr 15, 2013 1:40 pm

Growler wrote:Also check the small radiator under the dash. These can block up and reduce the flow as well...

Yeah that's a good thing to check, just undo the pipes in the engine bay at the firewall & give it a flush through.
-hope it's not that though, coz you have to pull the whole dash out to remove the heater matrix!

brooke5 · Post by **brooke5** » Mon Apr 15, 2013 4:07 pm

Mad Kiwi wrote:I had simialr issues with my number plate being in front of the radiator opening....

Maybe trying with it off or relocated could be a worthy test, if it is in that position.......

I would also ensure you have the pastic undertray installed. From my research, some cars dont respond well to this not being there....I removed mine and made an aluminium undetray so I have a spare you could borrow, possibly have.

I don't have my plastic drip tray installed and have never had any heat issues, and that includes some fairly hard driving...

Growler · Post by **Growler** » Tue Apr 16, 2013 1:19 pm

tomtikki wrote:
Growler wrote:Also check the small radiator under the dash. These can block up and reduce the flow as well...
Yeah that's a good thing to check, just undo the pipes in the engine bay at the firewall & give it a flush through.
-hope it's not that though, coz you have to pull the whole dash out to remove the heater matrix!

Be very careful removing the hoses. The pipes going onto the firewall are aluminimum and are very soft!

overheating

overheating

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