1999 Isuzu Trooper Repair Question
Isuzu Trooper Radiator Problem
There must be a leak somewhere for coolant to be depleted. If reserve tank is being depleted, that would mean a leak from radiator cap to cooling system. A pressure test should help you locate the source.
If the reserve tank is not being depleted but is increasing instead, problem would either be a head gasket or radiator cap fault.
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