Valve Timing Verification
WARNING: This page is about a different variant/trim than selected.
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.
| a - Timing Cover Mark With The Damper Notch |
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 COVER(S), CYLINDER HEAD, REMOVAL AND INSTALLATION .
- Remove the spark plugs. Refer to SPARK PLUG, REMOVAL AND INSTALLATION
.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 with the damper notch to place the number one cylinder piston at top-dead-center (TDC) on the exhaust stroke.
1 - Intake Phaser Timing Alignment Mark 2 - 7° Left Vertical Line 3 - Chain Pins 4 - Exhaust Phaser Timing Alignment Mark 5 - Front Timing Cover Gasket Surface - Verify that the intake phaser timing alignment mark is positioned 7° to the left of a vertical line that is perpendicular to the front timing cover gasket surface.
- Verify that there are 22 chain pins between the intake phaser timing alignment mark and the exhaust phaser timing alignment mark.
a - Timing Cover Mark And Damper Notch - Verify that the timing cover mark and damper notch 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 AND INSTALLATION .