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Maintenance - Modifications - Performance Upgrades - Problem Solving - Off-Road - Street Explorer Forum Covers the Explorer, ST, Sport, Sport Trac, Lincoln Aviator, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Ford Aerostar
My 92 EB is loosing coolant about 3-4 liters in 3 weeks. Got 300,000 kms on the odometer. Replaced the thermostat, gaskets, lower & upper manifold gaskets. Had my radiator repaired after it leaked on the left side (facing the engine). I noticed an oil leak between the tranny & engine, but also found leaking coolant. The oil leak must be coming from the rear oil seal, but where could the coolant be leaking through?? Any help & assist would be appreciated.
Sounds like a freeze plug on the back side of one of the cylinder heads. Mine blew on the passenger side head. Its possible for a head to crack if it got overheated, but i doubt it if you did not overheat the motor. You can try the stop leak stuff from the auto parts store but you may stop up the radiator or heater core with it. I have used it before and it does work to a point.
I wound up pulling the head off the engine and replacing the core plugs. These are round plugs that fill in bores on the cast iron parts of the engine. They are in the heads and the engine block. It allowed them to make the water cavities in the castings for the coolant to flow through in the engine.
I removed the whole engine to do some other work to it, but you don't have to go that far. I would recommend doing both heads at the same time though.
