Another temp switch Q

Post Thu May 21, 2009 1:14 am

M30 ac switch in the thermostat housing, Can this be used for the fan on the rad ? Or dose it kick in at to high temp ?

If not, then what have any of you used. (i have the e28 rad with space for one).

Post Thu May 21, 2009 6:53 pm

If the rad has a boss for a temp sender then fit it there, its the best place.
When I had my temp sender in the top hose I found the fan was coming on too often

Post Thu May 21, 2009 6:57 pm

Indeed, the fan is there to help cool the radiator, the thermostat is there to control the engine temperature. So the 'stat could be closed and the fan could be blowing air over a cold rad'

Post Fri May 22, 2009 11:02 am

So from which cars do the temp switches fit the e28 rad?

Post Mon May 25, 2009 8:28 pm

Good question mate.

Post Mon May 25, 2009 8:41 pm

i am using a gm / bmw switch fitted in my rad it starts the fan at 95degc and switches off at 90degc . the intermotor part number is 50184 . its a two teminal switch with the correct thead for the e36 rad that i am using .

Post Mon May 25, 2009 9:07 pm

We are both using a e28 rad fella.

thought it would need to be 90° start and 84° stop. (i am probrley wrong)

Post Mon May 25, 2009 9:18 pm

i think that switch is from an e28 [ could be wrong ] . i spoketo my local motor factors told them the thread size and pitch and thats wot they found for me . i have since looked on intermotors website at fan switches and there is a good number of switches with the same thead with various temps . m14x1.5 is the thead http://partfinder.smpeurope.com/index.h ... 9&value=42