Did you remember to install an O-ring on the new thermostat? If you look at the old 'stat, you will notice that it has an O-ring around the rim.

Dan

Peter wrote:

Dear Syncronauts
   I just installed a new thermostat in my '87 syncro and carefully put the housing back together and the housing is leaking like a sieve !!
I took it apart again and cleaned it all out where the top & bottom of the housing meet.  Everything looks fine!  I carefully put it back together, poured in the coolant again and its just raining in there!!!  I cant figure it out! Its not even under pressure! There are two flat surfaces that come together and are flush (the top half & the bottom) and there's a screw at each corner that holds them in place.  There's no rubber o ring or anything like that to make the seal.
     I can see the coolant just flowing out in between the seam.  It looks flush! I carefully screwed it down tightly with alot of pressure.  But not so much as to crack the plastic top.
 Any ideas?? Thanks,

Mystified,

Peter

please respond to me at printstud@bigfoot.com as well