2006 Jeep Wrangler Owner's Manual - Page 285
2006 Jeep Wrangler Manual
Page 285 highlights
MAINTAINING YOUR VEHICLE 285 With the engine at normal operating temperature (but not running), check the cooling system pressure cap for proper vacuum sealing by draining a small amount of antifreeze/coolant from the radiator drain cock. If the cap is sealing properly, the antifreeze/coolant will begin to drain from the coolant recovery bottle. DO NOT REMOVE THE COOLANT PRESSURE CAP WHEN THE COOLING SYSTEM IS HOT. Cooling System - Drain, Flush, And Refill At the intervals shown in the appropriate "Maintenance Schedule," the system should be drained, flushed, and refilled. If the solution is dirty and contains a considerable amount of sediment, clean and flush with reliable cooling system cleaner. Follow with a thorough rinsing to remove all deposits and chemicals. Properly dispose of old antifreeze/coolant solution. Discard old antifreeze/coolant solution according to recommended procedure. Selection Of Engine Coolant Use only the manufacturer's recommended antifreeze/ coolant, refer to Fluids, Lubricants, and Genuine Parts for correct antifreeze/coolant type. 7