A coolant leak may develop from the water pump. The engine may overheat as a result of the coolant loss. A leaking water pump should be replaced.
Car Problem Reports
Chevrolet Astro Leaking Water Pump May Cause Coolant Loss and Overheating
Chevrolet Astro Problem
Engine Affected: 4.3L V6
Visitor, 1995 Chevrolet Astro, 139,000 mi
Coolant started leaking from the Weep-hole under the water pump shaft casting. I replaced the water pump
and used a homemade gasket w shellac. No leaks woks fine