Engine Oil: Service and Repair

ENGINE OIL SERVICE

ENGINE OIL CHANGE

WARNING: NEW OR USED ENGINE OIL CAN BE IRRITATING TO THE SKIN. AVOID PROLONGED OR REPEATED SKIN CONTACT WITH ENGINE OIL. CONTAMINANTS IN USED ENGINE OIL, CAUSED BY INTERNAL COMBUSTION, CAN BE HAZARDOUS TO YOUR HEALTH. THOROUGHLY WASH EXPOSED SKIN WITH SOAP AND WATER. DO NOT WASH SKIN WITH GASOLINE, DIESEL FUEL, THINNER, OR SOLVENTS, HEALTH PROBLEMS CAN RESULT. DO NOT POLLUTE, DISPOSE OF USED ENGINE OIL PROPERLY. CONTACT YOUR DEALER OR GOVERNMENT AGENCY FOR LOCATION OF COLLECTION CENTER IN YOUR AREA.

CAUTION: Do not use oil filter with metric threads. The proper oil filter has SAE type 3/4 X 16 threads. An oil filter with metric threads can result in oil leaks and engine failure.

All Jeep engines are equipped with a high quality full-flow, throw-away type oil filter. Daimler Chrysler Corporation recommends a Mopar or equivalent oil filter be used.

Change engine oil at mileage and time intervals described in Maintenance Schedules.

Run engine until achieving normal operating temperature.

1. Position the vehicle on a level surface and turn engine off.
2. Hoist and support vehicle on safety stands.
3. Remove oil fill cap.
4. Place a suitable drain pan under crankcase drain.
5. Remove drain plug from crankcase and allow oil to drain into pan. Inspect drain plug threads for stretching or other damage. Replace drain plug if damaged.
6. Install drain plug in crankcase.
7. Position a drain pan under the oil filter.
8. Using a suitable oil filter wrench loosen filter.
9. Rotate the oil filter counterclockwise to remove it from the cylinder block oil filter boss or filter adapter housing.
10. When filter separates from adapter nipple, tip gasket end upward to minimize oil spill. Remove filter from vehicle.





11. Make sure old gasket comes off with oil filter. With a wiping cloth, clean the gasket sealing surface (Fig. 79) of oil and grime.
12. Lightly lubricate oil filter gasket with engine oil or chassis grease.
13. Thread filter onto adapter nipple. When gasket makes contact with sealing surface, (Fig. 79) hand tighten filter one full turn, do not over tighten.
14. Lower vehicle and fill crankcase with specified type and amount of engine oil.
15. Install oil fill cap.
16. Start engine and inspect for leaks.
17. Stop engine and inspect oil level.