Check it with the system presurized. I only noticed my leaking after 3 hours 
of highway driving on a 95� day. It was coming out the water pump weep hole. 
Never saw a drop in the driveway.

3800 miles and one water pump later...

Cheers,
Mark
RMNP/Grand Lake
Dinosaur NM
Flaming Gorge
Snake River Canyon/Twin Falls
Sun Valley
Craters of the Moon NM
Yellowstone NP
Devil's Tower NM
Black Hills
Mt. Rushmore NM
Badlands
Baraboo
4 large fires
6 moose (no flying squirrels)
2 bison
8 Elk
assorted pronghorn
assorted muledeer
1 coyote at old faithful