M20B25 thermostat housing?

[Jays323i]

Hi, I have a 81 323i that i'm installing a 2.5 motor in. This motor didn't have a thermostat housing on it. What i'm wondering is there sensors on this housing or are they located on the radiator? I'm thinking of using my housing if possible. Thanks Jay

[Jon325i]

Jay-

There are sensors on the t-stat housing of the M20B25 engine.

Jon

[Scatman]

Maybe there's a difference between the years...

My 87is has the sensor in the (left) side of the radiator - only a bleeder screw and hose nipples on the t-stat housing...

[Jays323i]

Thanks guys. I think there is a difference between 87 and 88 up. I seen one on ebay that appeared not to have any sensors. I checked my harness and it has connections for sensors, so i'll try mine with the right sensors. Thanks Jay

[AdamF 88iS]

The 2.5 will have 2 sensors on teh housing, there will be a blue connector and an orange connector on the harness for them.

[finch]

what year is the 2.5 that you are putting in?
Hope you didnt say that and i missed it.... 8)

[Jays323i]

Pretty sure it's a 88 or 89.
-Jay