are there cooler thermostat options?

[odortiz]

for the euro motors, besides the 50 deg C. and the 80 deg C. thermostats offered by bmw, are there any other options?

same applies to the fan switch that screws into the side of the radiator.

[BSH]

Those are the only two variants I'm aware of.

[synkro]

Those are the only two variants I'm aware of.

which one is the best choice?

[BSH]

which one is the best choice?Definitely 80deg for a street motor.

[GazM3]

50degC one would have the car run on cold start mode in winter and the heater will not work wery well.


Ill check out one of the uk based bmw forums as they suggest a cooler thermostat when they delete the front viscus fan.

[morerevsm3]

Z M coupe thermostat is colder than S50B30, and direct fit, and available non genuine

[BSH]

Z M coupe thermostat is colder than S50B30, and direct fit, and available non genuineI just checked the ETK and the MZ3, S50 B30 and S50 B32 have the same p/n. :dunno

[odortiz]

I just checked the ETK and the MZ3, S50 B30 and S50 B32 have the same p/n. :dunno

i also checked the part numbers for the US and euro of all 3 s54 cars. all same stat. even the CSL has the same stat.

[synkro]

they are available only OEM? I can't find a aftermarket one.

[M3 Euro LTW]

I may be wrong about this, but I think from memory that my LTW came with a fan switch with two outputs.... The Bentley manual could elaborate, check the wiring for 95 model year.

There were two fan settings, so you could re-wire it to choose a custom variation, ie, to have hi setting triggered at the lower temperature. You could always bring the wires into the dash area, and take control by yourself. I've heard of autocrossers who like to manually switch on their fans before the critical run to cool the engine off. This would be the avenue.

Or, even simpler, I went to aftermarket companies like JEGS or whatever, to find customized switches for the temperature I wanted.

(that was years ago, to be upfront, I don't recall what temperature I chose)

Alex.