Contents Section: Cooling System (mechanical) All sections

Cooling System Specifications Jeep Wagoneer SJ

THERMOSTAT

Thermostat, located in water outlet elbow, is a pellet type with an opening temperature of 195°F (90°C). Thermostat should be fully open at 218°F (103°C) on all engines.

PRESSURE CAP

All models use a 14 psi (1.0kg/cm 2 ) pressure cap. Test cap at 12-15 psi (.8-1.0 kg/cm 2 ) for 30 seconds or more.

WATER PUMP

Water pump impeller is pressed on the rear of pump shaft and bearing assembly. Pump is serviced as an assembly only.

MAINTENANCE

At 12,500 miles or 12 months, change engine coolant. Thereafter, change engine coolant at the start of winter. Maintain coolant level with a 50% mixture of ethylene glycol based anti-freeze and low mineral content water year-around.

ApplicationQuarts (L)
2.5L Engines7.8 (7.1)
4.2L Engines10.5 (9.9)
5.9L Engines14.0 (13.2)

COOLANT CAPACITY