My Plus 4 has just had a new radiator fitted (from Williams) and everything looks fine. Running temperature is usually about 90-95 deg C as indicated by the temp gauge and I can hear the cooling fan cutting in and out.
Went out a day or two ago for the first proper drive of the year and did about 150 miles without any problem. Then I spent half an hour in heavy city traffic and the temperature rose to an indicated 120 deg C. The only way to get the temperature down was to turn the heater on full. After running outside the city for a while the temperature came back to normal. No sign of water leaks when I got home. When the engine is just ticking over the fan still operates at about 95deg C.
There are two relays for the fan – marked high and low on the wiring diagrams I found on TM – which I guess relate to fan speed. Is that right? And Is it likely that the high relay has failed? The relays are Tyco 0-1432793-1.
All suggestions gratefully received.
