REMOVAL & INSTALLATION
See Figures 1, 2 and 3
On these engines, the cylinder head must be removed prior to camshaft removal.
- Disconnect the negative battery cable. Properly relieve the fuel system pressure, as outlined in Fuel System of this guide.
- Remove the cylinder head, as outlined earlier in this section.
- Remove the camshaft sensor and camshaft target magnet.
- Carefully slide the camshaft from the rear of the cylinder head. Be very careful not to damage the camshaft during removal.
- Inspect the camshaft and related components for wear as outlined later in this section.
- Lubricate the camshaft journals with oil, then install the camshaft without the rocker arm assemblies installed.
- Install the camshaft target magnet into the end of the camshaft. Tighten the mounting screw to 30 inch lbs. (3.4 Nm).
- Install the camshaft position sensor and tighten the retaining screws to 80 inch lbs. (9 Nm).
Measure the camshaft end-play using the following procedure:
- Mount a suitable dial indicator to a stationary point on the cylinder head.
Using a suitable tool, move the camshaft to the rearward limits of travel.
- Zero the dial indicator.
- Move the camshaft forward to the limits of travel and read the dial indicator. The end-play travel should be 0.005-0.013 in. (0.13-0.33mm).
- Install the front camshaft seal. The camshaft must be installed before the seal is installed.
- Install the cylinder head.
- Install the rear timing belt cover.
- Install the camshaft sprocket and tighten the bolt to 85 ft. lbs. (115 Nm).
- Install the timing belt tensioner and timing belt.
- Install the rocker arm shaft assemblies in the same position as they were removed. Tighten the rocker arm assemblies in the sequence shown in the accompanying illustration to 21 ft. lbs. (28 Nm).
- Install the rocker arm (valve) cover.
- Connect the negative battery cable.
Check the camshaft journals for scratches and worn areas. If light scratches are found, you can remove them carefully with 400-grit sandpaper. If deep scratches are found, replace the camshaft check the cylinder head for damage. Replace the cylinder head if worn of damaged. Check the lobes for pitting and wear. If the lobes show signs of wear, check the corresponding rocker arm roller for wear or damage. Replace the rocker arm/hydraulic lash adjuster if worn or damaged. If the lobes show signs of pitting on the nose, flank or base circle, the camshaft must be replaced.