I was having a similar problem in my 01. just couldn't see whenre the coolant was going, but it would be low every month or so.
finally saw that the gasket between the block and timing cover was leaking down on the side. Just enough so that when the engine warmed up and the cooling system was pressurized it would mist out, not enough to see a leak, but it was leaving the system.


"243/85TSX It's as if the HAMMER OF THOR were wielded by CHUCK NORRIS himself, and a roundhouse kick thrown in for good measure."