Originally Posted by 164gta
i got my 164 about a month ago and am loving it, only thing is the fan on the rad runs as soon as i turn the ignition on, ive had a look under the bonnet and the factory wires appear to have been cut and a bypass put in with some other wires??. if anyone can explain this and why someone mite do it and a possible fix, both me and my car would be grateful
Yes, this is a common repair which I dislike very much. The slow speed fan resistor has been by passed by connecting the brown and blue wires together and the high speed wired up to run with key on.
My suggestion is to replace the resistor, and repair all wires to run on 2 speed fan.
Here is a discussion about it with wiring diagrams and general info on the fan:
No low speed cooling fan operation - Alfa Romeo Bulletin Board & Forums
I run all my 164 and customers cars exactly how it came from the factory, have 0 problems with it this way. I see very hot temps here and never overheat, takes less out of the fan this way as well. Running all the time on high wears the fan FAST.
Jason