That being said, here's a general outline of the process. Always consult a factory service manual specific to your 1997 Dodge Ram 5.9L V8 for precise specifications and diagrams. The manual will provide crucial details like valve lash clearances (measured in thousandths of an inch) that are *critical* to get right. These specifications vary based on engine wear and other factors, and using incorrect values is extremely harmful.
Tools Required (at minimum):
* Factory Service Manual: Absolutely essential.
* Socket Set: Various sizes, including those needed for the rocker arm nuts.
* Wrench Set: For various bolts and other fasteners.
* Valve Lash Adjusting Tool (Feeler Gauges): Accurate feeler gauges are critical for correct adjustment.
* Torque Wrench: To properly tighten the rocker arm nuts to the specified torque.
* Pry Bar or similar: Might be needed to help manipulate rocker arms.
* Jack and Jack Stands: To safely support the vehicle.
* Wheel Chocks: For safety.
* Gloves and Safety Glasses: Protect yourself.
* Clean rags: To keep the engine clean.
General Procedure (This is a simplified overview; consult your manual for specifics):
1. Safety First: Disconnect the negative battery terminal. Support the vehicle securely on jack stands. Use wheel chocks.
2. Access the Valve Cover: Remove the valve cover(s). This may involve removing other components depending on your specific engine configuration. Consult your service manual for precise instructions and bolt locations.
3. Locate the Rocker Arms: Identify the rocker arms for each valve (intake and exhaust).
4. Engine at Top Dead Center (TDC): This is crucial. You MUST rotate the engine to the correct TDC for the cylinder you're working on. Your service manual will guide you on how to properly locate TDC using the timing marks on the crankshaft pulley and/or distributor. Failure to do this accurately will result in incorrect valve adjustments.
5. Measure and Adjust Valve Lash: Use the feeler gauge to measure the gap between the rocker arm and the valve stem. The manual will specify the correct lash for intake and exhaust valves. Loosen the rocker arm nut, adjust the rocker arm screw (if equipped, some engines use shims), and retighten the nut to the specified torque. Repeat for each valve, one cylinder at a time, making sure the engine remains at TDC for that cylinder.
6. Repeat for all Cylinders: Follow the same procedure for all cylinders. The firing order is essential here; your service manual will have the correct firing order for your engine.
7. Reassemble: Reinstall the valve cover(s) and any other components you removed. Torque all bolts to the manufacturer's specifications.
8. Reconnect Battery: Reconnect the negative battery terminal.
Important Considerations:
* Hydraulic Lifters: Many 5.9L V8 engines use hydraulic lifters. If yours does, valve adjustments are typically not necessary unless there's a problem (e.g., lifter noise, poor performance). However, it's still crucial to consult the manual as there might be specific procedures or considerations.
* Shim Adjustment: Some 5.9L V8s may use shims instead of adjusting screws under the rocker arms. This is a more involved process that requires removing the camshaft. Your service manual will detail the correct procedure.
* Engine Temperature: The engine should be at operating temperature for accurate measurements. Some procedures might specify a cold or warm engine. Refer to the manual.
Again, this is a simplified overview. The factory service manual is absolutely critical for successfully and safely adjusting valves on your 1997 Dodge Ram 5.9L V8. Improper adjustment can cause severe engine damage. If you're not comfortable performing this task, have a qualified mechanic do it for you.
