I have a '96 Mazda Miata with a cooling problem.  In December of 2005
the radiator started spewing antifreeze and Firestone put a new
radiator in.  A few months later I took it to an air conditioning place
for freon.

The radiator worked for several months and then one day I heard a
'boiling' type noise under the hood and noticed the temp gauge was
pegged on hot.  (Oops - hadn't checked the gauge until I heard the
noise).  I took the car to an air conditioning place because the air
conditioning had not worked in a couple weeks either.  Turns out there
is a safety feature that makes the air not run when the engine is
overheating.

The radiator was EMPTY.  No water or antifreeze.  So Ice Cold Auto Air
filled it up and ordered a new fan belt.  That worked for another few
weeks.  Last week it overheated and the radiator was empty again.  They
put a new thermostate in.  During all of this there has been nothing on
my garage floor.  No leaks.

This time filling the radiator up only lasted for a couple days.
Today, after getting an oil change, it overheated again and this time
left antifreeze on the ground.  Mobile Express also said they ran a
pressure test on the radiator cap and the pressure was good.

Any ideas?  Does this sound like a head gasket?  Time to finally retire
the '96?  It has 134,000 miles on it.

Sorry so long for a newbe.  Hoping someone can advise whether to get
this fixed or get rid of the car.  It's been good to me, so the next
car will be the same thing - even same color.  :o)

Thanks!