I'm losing coolant from the radiator but I can't tell from exactly where. It doesn't appear to be from the hoses but toward the bottom of the radiator. I guess doing a pressure test is the next step but I don't know how to do that and don't have the equipment. I looked in the tech tips for some info but couldn't find anything. My radiator is a Champion aluminum that's about 7 years old. What's your advice? Thanks!

~Denny
1953 Chevy 3100
w/1960 261 cid, 848 head | Weber 32/36 progressive 2 barrel carb. | Three on the tree & 3:55 torque tube | 12 V w/Gener-Nator & 6 V starter
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1998 Chevy Suburban 350 ci awd/4wd