Coolant Leak & Engine Overheating on Chevrolet Blazer

A coolant leak may develop from the water pump. This can result in an engine overheating condition. A leaking water pump will require replacement.

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Average mileage: 84,500 (60,000–109,000)
Engine affected: Gasoline
7 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1998
8 people reported this problem
2 people shared problem details
1993 Chevrolet Blazer109,000
Looseing coolant, heater core replacement
heat only at higher rpm, gurgling sound in heater core. loss of coolant allows heater core to air lock (its higher than the radiator). stains on bottom of pump by bearing "weep" hole show pump slings out coolant while running. replaced pump and parked facing uphill to to top off radiator.
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