Upon returning from a 108 mile journey today I discovered about a 20 inch diameter wet spot on the driveway after about 20 minutes after I got home. After thinking did I hit a puddle prior to backing up the driveway - the answer turned out to be No.
Lift the hood and look at the radiator pan and its wet on the driver side. Overflow bottle still full. Check the pet c*ck, its tight. Feel the upper hose, its dry, Hey !?, whats this green on the top three ribs of the side tank ?
I removed the radiator shroud for a better look on the forward side of the tanks. Looks like three small cracks on the upper three ribs of the tank, an inch away from the pinch seam. Even the raised ribs are cracked, not just the flat part of the tank. After examining the passenger side tank it to has some very faint fractures.
This is the original Harrison radiator, and never had any repairs. I guess I know what I'll be doing tomorrow. I mights as well buy a new heater core while I'm at it.
========= Harryface =========
1991 Pontiac Bonneville LE 3800 V6 ( C ), Black/Slate Grey _~_~_~_~277, 028 miles_~_~_ ~_~_