Left Camshaft: Installation
- Lubricate the camshaft journals with clean engine oil.CAUTION:
Do not rotate the camshafts more than a few degrees independently of the crankshaft. Valve to piston contact could occur resulting in possible valve damage. If the camshafts need to be rotated more than a few degrees, first move the pistons away from the cylinder heads by rotating the crankshaft counterclockwise to a position 30° before-top-dead-center. Once the camshafts are returned to their top-dead-center position, rotate the crankshaft clockwise to return the crankshaft to top-dead-center.
- Install the left side camshaft(s) with the alignment holes (1) positioned approximately 30° before top-dead-center. This will place the camshafts at the neutral position (no valve load) easing the installation of the camshaft bearing caps.
Caps are identified numerically (1 through 4), intake or exhaust (I or E) and should be installed from the front to the rear of the engine. All caps should be installed with the notch forward so that the stamped arrows (<) on the caps point toward the front of the engine.
- Install the camshaft bearing caps and tighten the bolts finger tight.
- Verify the rocker arms are aligned to the cam lobe. Refer to ROCKER ARM, VALVE, REMOVAL AND INSTALLATION .
- Using the tightening sequence shown, tighten the bearing cap bolts to the proper torque specification. Refer to TECHNICAL SPECIFICATIONS .
- Rotate the camshafts clockwise to top-dead-center by positioning the alignment holes vertically.
- Install the variable valve timing assembly. Refer to ASSEMBLY, VARIABLE VALVE TIMING, PHASER / OIL CONTROL VALVE, REMOVAL AND INSTALLATION .
The Cam/Crank Variation Relearn procedure must be performed using the scan tool anytime there has been a repair/replacement made to a powertrain system, for example: flywheel, valvetrain, camshaft and/or crankshaft sensors or components.