Car overheating

[rockdrummer4]

Well driving to work this morning, noticed the hot air not coming out, it was slightly warm air... was not overheating at this stage.

Most of my driving is on the motorway, but noticed when I got to town and stopping at traffic lights the car started to overheat, then Id start off again and the needle would be going up and down - very strange.

Any ideas what the problem is?

1998 Mk1 MX5

[charged_rs]

the thermostat has suck in the closed position...time for a new one

dont buy a cheap one from a motor factors as they are crap...spend the £25 and get an oem mazda one

[rockdrummer4]

I got the thermostat replaced in mazda garage last october !
am I gonna get home in this thing - 25 miles?

[charged_rs]

did they use a genuine mazda thermostat ?

some dealers use pattern parts , so its worth checking.

as for driving 25 miles without the coolant circulating round the radiator - i wouldnt advise it, unless you want to change the head gasket aswell ?

[rockdrummer4]

Noticed overflow was very low, so topped this up and went for few mile drive and it didnt overheat.... Taking to garage after work. Blanch - drogheda

[charged_rs]

Noticed overflow was very low, so topped this up and went for few mile drive and it didnt overheat.... Taking to garage after work. Blanch - drogheda

thats cos its boiling off , while you are there get a new rad cap

[rockdrummer4]

Hey,

I asked and they did use genuine Mazda Thermostat.

The problem is radiator is leaking, hope to get it fixed today.

Thanks for your help