sas1810
New Member
how can it be the fan if the car overheats at speed? Fans do nothing once the car is moving at more than 20ish mph.....
Pump and rad both new
The only thing I can think of is that the new thermostat is not working properly (did you test it as there are lots of reports on here of faulty new thermostats) or there is a blockage somewhere that is restricting flow.
Odd one this.........
Cheers
Jerry
the viscous coupling relies on heat. the hotter it gets, the more it works. if the coupling is duff, it wont spin as fast as it should, therefore not pulling enough air through the rads to cool the liquid inside them.
the newspaper test as mentioned is about the only way to test them. start engine, wait till it gets hot, put rolled up paper into the blade. if it stops, fooked. if it keeps going and shreds the paper, all good.
you can also tell if it works by hearing a loud WHOOOOSHING sound as you rev the engine and a lot of hot air coming at you.