Removal Procedure
- Remove the camshaft cover. Refer to Camshaft Cover Replacement (LV7) .
- Remove the front bumper fascia opening lower cover. Refer to Front Bumper Fascia Opening Lower Cover Replacement .
Adjust the engine to cylinder 1 top dead center (TDC) of combustion stroke. Set crankshaft in direction of engine rotation until the markings (1, 2) line up. Rotate at the crankshaft balancer bolt (3).
Install the EN-51632 holder (1).
- If the EN-51632 holder (1) can be installed, the engine timing is properly adjusted.
- If the EN-51632 holder (1) can't be installed, rotate the crankshaft as long the EN-51632 holder can be installed.
Check the position of the crankshaft. The crankshaft must be set to TDC, the arrow (1) on the crankshaft balancer and the arrow (2).
- If the arrows (1, 2) do not align, set the engine to TDC, refer to step 2.
Remove the EN-51632 holder (1).
- Remove the timing chain upper guide. Refer to Timing Chain Upper Guide Replacement .
- Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
Remove the engine front cover hole plug (1) from the engine front cover (3).
- Remove the seal ring (2).
Pre-Install the EN-51691 retainer (1) to the intake side of the camshaft timing chain (2).
- Install the EN-51691 retainer to the exhaust side of the camshaft timing chain (2).
- Hand tighten the thumb wheels securely.
- Tighten the bolt to 5 N.m (44 lb in).
- NOTE:
Steps 20.1 - 20.5 explain the mechanism of tensioner design 1.
Check through the engine front cover hole plug bore (2) which timing chain tensioner is installed.
- The timing chain tensioner design 1 is identified by the lever (3).
- The timing chain tensioner design 2 is identified by the release clip (1).
Slightly release tension from the piston (2) until bar (1) can be unlocked by rotating the lever (3) in direction of arrow.
Entirely push back the piston (1) until the tensioner. Lever (2) cannot be locked in this position.
Release tension from the piston (1) until it releases for three ratchets. The three ratchets can be noticed by the click noises.
Apply tension to the piston until the lever (1) is rotated back into the locking position where the bore in the lever aligns with the bore in the tensioner housing.
- Fix the lever in this position with a suitable fixing pin (2).
- CAUTION:
The tightening force must be applied gently to the wrench. Using too much force will lead to an overlap of the timing chain that will cause severe engine damages.
NOTE:A second technician is required.
Install a suitable wrench (1) to the intake camshaft.
- Apply tension to the chain tensioner by slightly rotating the intake camshaft clockwise.
- Remove the wrench.
- NOTE:
The timing chain tensioner has now the lock position (1).
NOTE:The following step shows the tensioner design.
Secure the timing chain tensioner with a suitable fixing pin 3 mm (0.118 in).
Fix the EN-51691 retainer (1) to the intake side of the camshaft timing chain.
- Tighten the bolt of the EN-51691 retainer to 5 N.m (44 lb in).
- NOTE:
The timing chain can be moved up and down between both camshaft position actuators.
Check chain slack, if not enough slack is gained, refer to detailed chain tensioner description from step 19 to 25. Apply and release tension to the chain tensioner.
Remove and DISCARD the intake camshaft position actuator bolt (1).
- Remove the intake camshaft position actuator (2).
Adjust the camshaft position actuators until EN-51691 holder (1) can be installed.
The marks of the camshaft position actuator must be positioned approximately at 12 O'Clock position.
Refer to Fastener Caution .
Follow Steps 20.1 - 20.5 during rotation of the intake camshaft with tensioner design 1.
The camshaft timing chain will be hold by EN-51691 retainer.