Over Heating Problems

[ben_haynes]

My disco 200TDi Over heats when doing motorway driving but i can do long runs on country roads and it will not over heat, on sunday i went from Kettering to Godmanchester (Cambridgeshire) on the A14 and then returned carrying on up to Birmingham. up the A14 and M6 and the temp gauge goes up to the red and the light flashes so i switch the heater on to cool it down, it cools down a slight amount but no real change, but if i get caught in a traffic jam with the heater off it will cool right down to just under half way.

Any Ideas what is causing it?

I have recently cleanedthe radiator of loads of mud and it is still clean. as i thought it was that causing it but it wa not.

[dazzawhipple]

Water pump pumping ???? or not

Darren

[ben_haynes]

i hope not as i replaced that when i did the cambelt in january but i will check it out, it might just need a Radiator / Engine Flush to clean out the insides

[dazzawhipple]

Ben,

Sounds like the rad is corroded it may be best to start with that

With this hot weather it finds out anyt weak points in the cooling system

Darren

[ben_haynes]

Ben,

Sounds like the rad is corroded it may be best to start with that

With this hot weather it finds out anyt weak points in the cooling system

Darren

but i am not losing any water so i dont think it is this or there would be noticable water lose in the header / expantion tank

[ben_haynes]

Ben,

Sounds like the rad is corroded it may be best to start with that

With this hot weather it finds out anyt weak points in the cooling system

Darren

 i have just been reading Jakes post about the air con and gords reply about his doing the same and he replaced the radiator so i will try that first

[gords]

i have just been reading Jakes post about the air con and gords reply about his doing the same and he replaced the radiator so i will try that first

Ooh, I was just about to post ....    :lol:

[bilge rat]

i have just been reading Jakes post about the air con and gords reply about his doing the same and he replaced the radiator so i will try that first

Ooh, I was just about to post ....    :lol:

does sound like the rad is blocked, or the fins are full of mud, all the cooling fins on mine fell out, that caused a similar fault. alan....

[landroverkeith]

thats the same as mine too now ....

[ben_haynes]

the fins are full of mud

i have just washed the rad out before the run as i thought it was that too.

[Eeyore]

Checked the system for air locks or blockages?

If the pumps good, and you're not losing water, then it might not be getting around.

cheers
 8)
Eeyore

[ben_haynes]

Cheers Eeyore will have a look at it on sat when i get time