2004 Jeep Liberty Owner's Manual - Page 346

M 346 SCHEDULE "A" A I N Miles T (Kilometers) E N [Months] A Change the engine oil and engine oil filter. N C Inspect the brake linings. E Inspect the engine air filter element, and replace if necessary. S C H E D U L E S 108,000 (173 000) [108] X X 114,000 (182 000) [114] X 120,000 (192 000) [120] X X X X X X X X X 8 Replace the spark plugs. Inspect and replace the PCV valve, if necessary. Inspect the ignition cables, and replace if necessary (2.4L Only). Inspect the drive belt and replace as needed. Not required if previously replaced. Flush and replace the engine coolant if not done at 163 000 km (102,000 miles). Replace the timing belt (2.4L Only). Drain and refill the transfer case fluid. Inspection and service should be performed anytime a malfunction is observed or suspected. Retain all receipts. X This maintenance is recommended by the manufacturer to the owner, but it is not required to maintain emissions warranty.