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Home >> Jeep >> 1989 >> Comanche Base, 4.0 L, 4WD, Automatic >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Cooling System Specifications >> Maintenance Schedule

Maintenance Schedule

Engine coolant protection should be checked once a year at the beginning of the winter season. Change engine coolant every 22,500 miles or 22 months. Maintain a 50/50 coolant/water mixture.

COOLING SYSTEM SPECIFICATIONS

Application Thermo. Temp. °F(°C) Rad. Cap psi Coolant Capacity Qts. (L)
2.5L 195 (91) 12-15 (1) 10 (9.5)
4.0L 195 (91) 12-15 12 (11.4)
4.2L 195 (91) 12-15 10.5 (9.9)
5.9L 195 (91) 12-15 15.5 (14.7)
(1) Wrangler 9 qts. (8.5L).