Hi everyone,
I have been experiencing some overheating problems on my 94 318
convertable.  Last Thursday the reservoir next to the rad was replaced,
and everything was pressure checked so I thought I was good to go.
Over the weekend the car ran fine, however today while running to the
grocery store the car started to overheat again!   I got the car back
to my house, let it cool down for a bit and after noticing that coolant
was leaking, topped off the system with 50/50 coolant.  After putting
more coolant into the car I let the car run and noticed the temp
started to climb.  However when I drove the car around the block for a
while, the temp started to drop to about half way.  Its about 90 here
today with a pretty high level of humidity.  I dont know if that has
anything to do with it, but i find it odd that coolant is seeping from
the car and the temp drops to normal once the car has been driven
around the block.

Any ideas as to what might be wrong???