I have discovered two leaks today and need some advice/opinion.  First I have a master cylinder that is two years old and is leaking around one of the gromet/seal that the brake fluid reservoir sit in (it is the one closest to the front that is leaking.  It looks like I can get new gromets/seals from some list vendors.  Would that fix the leak or is there something inside the mastercylinder that is causing it to leak.
 
My coolant leak is kind of stange.  Coolant puddles around the coolant level sensor on the coolant pressure tank.  My coolant pressure tank is two years old and I just replaced the coolant level sensor thinking that my old one was leaking.  The coolant is still puddling aroung my new sensor after I leave the motor cool down.  I cannot figure where it is comming from as today it was just siting right in top of the sensor and not in the little recess on the tank at all.  Could it be comming out of the electical conection in the sensor?  Thanks
 
Pascal
'84 Westy