Hi, I have a 93 Civic EX 4 door(Auto) 1.5L L4 FI  with the following
problems...
It has 360,000 kms  has had regular suggested maintenance done by honda
dealer.
Original owner.

Revs high at startup then idles up and down after 5 mins(warmed up)
After driving at 60km/hr it overheats(10 mins of driving)
Rad Fan doesn't come on.
appears to be leaking coolant from bottom of radiator near/at hose on
right passenger side
Top rad hose is warm and the bottom rad hose cool
Collant level is getting high in resivoir tank
Coolant level now is not visable in the radiator(it was yesterday)

Coolant does not appear to have oil in it
no visable bubbles in the coolant resivoir tank
Oil does not smell sweet
exaust color seems normal but there is a sulfur smell.

I was thinking thermostat at first but then the idle problem confused
me.

any idea's?

thank you

Greg