2004 Jeep Liberty Owner's Manual - Page 338

M 338 SCHEDULE "B" A I N Miles T (Kilometers) E N Change the engine oil and engine oil filter. A Inspect the engine air filter element, replace if N C necessary. E Replace the spark plugs. S C H E D U L E S 78,000 (125 000) X 81,000 (130 000) X 84,000 (134 000) X 87,000 (139 000) X 90,000 (144 000) X X X X Inspect and replace the PCV valve, if necessary. Inspect the brake linings. Drain and refill the front and rear axle fluid‡ Inspect the drive belt and replace as needed. Not required if belt was previously replaced. Replace the timing belt (2.4L Only). Inspect the transfer case fluid, add if necessary. X X X X X 8