Radiator fan switch

[Drewe30e]

Has anyone here upgraded their radiator fan switch from the 91 degree to the 82 degree? I was wondering if it was really worth it and if it would be necessary.

Currently my low fan switch does not work and I am planning on autocrossing my car this summer=possible overheating. Should I just go with the stock 91 degree or the lower temp?

Also, should I keep my 99 degree or get a lower temp for that too?

[Drewe30e]

So nobody has ever been involved with this issue? I'm just looking for a quick answer because its starting to get hot out and my car isn't liking stop-and-go traffic.

[BMW BMXER]

The aux fan has two different kinds of switches? :shock:

I need to change mine. I will probably put in the lower one, thanks for letting me know the options.

[Drewe30e]

not a problem

[NickP]

You can also run the 318ti switch which I think is 80/88. This is what I have in mine.

[Drewe30e]

You can also run the 318ti switch which I think is 80/88. This is what I have in mine.

With that setup does your fan run constantly? If so, do you notice your alternator pulling more power from your engine?

[ptownTSI]

to keep this thing from going up to 3/4 on the water temp needle is there a way to plug the high speed wire to the lower of the two temp switches so it doesnt get so hot?

how hot is 3/4 of the way on the water temp?

[Kip]

3/4

So there is a way to keep it from going 3/4?

It is getting to 80's here, and having to ride with heat on sux. I really need to dig into this...

Aux fan never comes on on my 88.