I recently replaced the sensor on my '86 Syncro. The one I
removed was a crazed and brittle mess. It had been leaking for
some time and the leak went away after the sensor was replaced.

I did not have to drain and replace the coolant (did I?).

Now my front hoses are leaking:(

John-Reed Maffeo  '86 Syncro - Glacie
Mesa, AZ