- Inspect camshaft bearing journals for damage and binding. If journals are binding, check the cylinder head for damage. Also check cylinder head oil holes for clogging.
Check the cam lobe and bearing surfaces for abnormal wear and damage. Replace camshaft if defective.
NOTEIf camshaft is replaced due to lobe wear or damage, always replace the rocker arms.
- Measure the lobe actual wear (unworn area - wear zone = actual wear) and replace camshaft if out of limit. Standard value is 0.001 inches (0.0254mm), wear limit is 0.010 inches (0.254mm).
Removal & Installation
- Before servicing the vehicle, refer to the Precautions section.
- Relieve the fuel system pressure.
Remove or disconnect the following:
Negative battery cable
Make certain that the pistons are
at Top Dead Center (TDC) before installing the camshafts.
- Install the camshafts and cam followers, lubricate the bearing journals thoroughly.
- Install the left and right camshaft bearing caps, No-s 2-5 and right side No. 6. Torque these fasteners to 105 inch lbs. (12 Nm). Apply Mopar® gasket maker to No.1 and left side No. 6. Torque these fasteners to 18 ft. lbs. (24 Nm) on 2002 models or 250 ft. lbs. (28 Nm) on 2003-06 models.
Install or connect the following:
NOTEAn oil and filter change are recommended.
Use a DRB® scam tool to perform the camshaft and crankshaft timing relearn procedure, as follows:
- Connect the scan tool to the DLC (located under the instrument panel, near the steering column).
- Turn the ignition switch ON and access the -miscellaneous- screen.
- Select the -re-learn cam/crank- option, then follow the instructions on the scan tool screen.
- Start the engine and check for leaks. Run the engine with the radiator cap off so as the engine warms and the thermostat opens, coolant can be added to the radiator. Test drive vehicle to check for proper operation.