It should be drained at least to below the thermostat level. That way
all the coolant in the cylinder head won't come out of the intake
housing over the lower side of the engine, AC compressor, and all over
the floor. You're talking about ~1 gal for a typical drain so might as
well. But some coolant will come out when you take off the housing, so
be prepared to catch it.

Do use a Toyota thermostat and new gasket, distilled water (no
minerals added) and preferred Toyota red if you can still find it
(otherwise use prediluted Toyota pink, the long life GM-Dexcool
imitator without the 2EHA acid).

Autozone's free online repair guide for various 83-96 Camry engines:
http://www.autozone.com/az/cds/en_us/0900823d/80/13/e9/8f/0900823d8013e98f/repai
rInfoPages.htm

On May 24, 4:40 pm, "John Carlson" <j.carlson1removes...@mchsi.com>
wrote: