Coolant Leak From Heater Core on Isuzu Pickup

The heater core may leak coolant, excess coolant loss can result in engine overheating. Our technicians tell us a revised, copper heater is available to replace the original aluminum one.

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Average mileage: 115,000 (82,000–148,000)
6 model years affected: 1990, 1991, 1992, 1993, more1994, 1995
8 people reported this problem
2 people shared problem details
1993 Isuzu Pickup148,000
I am asking for my mechanic to test the core if it is something that is done without special equipment- then i can determine if that was the problem- I assume it is because the previous owner had installed a new radiator. I have not found out much in regard to how a test is done or where to find a copper heater core.
1993 Isuzu Pickup82,000
Coolant leak in heater core at 82000 miles.
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