Valve Timing Verification
WARNING: This page is about a different variant/trim than selected.
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CAUTION:
Painted or colored chain links are used during initial engine assembly and can not be relied upon for valve timing verification. Only use top-dead-center marks, cylinder head cover mounting surface and camshaft sprocket marks to verify valve timing or engine damage may result.
Correct timing is critical for the NON free-wheeling designed engine. Engine timing can be verified by using the following procedures:
- Remove the cylinder head cover. Refer to REMOVAL .
- Remove the spark plugs. Refer to REMOVAL
.CAUTION:
When aligning timing marks, always rotate engine by turning the crankshaft. Failure to do so will result in valve or piston damage.
- Rotate the crankshaft clockwise (as viewed from the front) to align the timing cover mark (1) with the damper notch (2) to place the number one cylinder piston at top-dead-center (TDC) on the exhaust stroke.
- Verify that the intake phaser timing alignment mark (1) is positioned 7 degrees (2) to the left of a vertical line that is perpendicular to the front timing cover gasket surface (5).
- Verify that there are 22 chain pins (3) between the intake phaser timing alignment mark (1) and the exhaust phaser timing alignment mark (4).
- Verify that the timing cover mark (1) and damper notch (2) are still aligned. If the engine timing is not correct, proceed to Timing Chain and Sprockets for service procedures. Refer to CHAIN AND SPROCKETS, TIMING, REMOVAL .