Timing Chain LH

NOTE:

Be careful that the foreign matter is not into or onto the assembled component during installation.
Apply engine oil to all component parts of the timing chain.

Install the side chain guide LH to the front camshaft cap LH.
Tightening torque:

6.4 N.m (0.7 kgf-m, 4.7 ft-lb)

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Prepare to attach the chain tensioner LH.

Press the link plate (A) in the direction of arrow to insert the plunger (B).

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In order to secure the plunger, insert a stopper pin (clips, etc.) with a diameter of 1.2 mm (0.0472 in) or less or a hex wrench with a diameter of 1.2 mm into the stopper pin hole.

NOTE: If the stopper pin hole on the link plate and the stopper pin hole on the chain tensioner are not aligned, check that the first notch of plunger rack (A) is engaged with the stopper tooth (B). If not engaged, retract the plunger a little so that the first notch of plunger rack (A) is engaged with the stopper tooth (B).

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Check that the alignment mark of the crank sprocket is located at the position shown in the figure. If not aligned, using the ST turn the crankshaft to align the crank sprocket alignment mark to the position shown in the figure.
NOTE: This procedure is required to prevent the valve and piston contacting with each other in the next step.

Preparation tool:

ST: CRANKSHAFT SOCKET (18252AA000)

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Using ST1 and ST2, by turning the intake cam sprocket LH, align the alignment marks (protrusion) to the positions as shown in the figure.
CAUTION:
- When the intake valve and exhaust valve lift at the same time, the valve heads contact each other and valve stem may bend. Do not turn the exhaust camshaft LH.
- Perform the operation carefully since the ST comes off easily.
Preparation tool:

ST1: PULLEY WRENCH (18355AA000)

ST2: PULLEY WRENCH PIN SET (18334AA020)

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Using the ST and by turning the crankshaft approximately 200° counterclockwise, align the alignment marks of crankshaft key to the positions as shown in the figure.
CAUTION: Never turn clockwise because the valve and piston may contact. Clockwise turn is allowed only when adjusting the key position precisely, after turning the crankshaft counterclockwise to bring the key near the position as shown in the figure.

Preparation tool:

ST: CRANKSHAFT SOCKET (18252AA000)

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Align the alignment mark (protrusion) of exhaust cam sprocket LH to the position shown in the figure.
CAUTION: To prevent valve damage, turn the exhaust cam sprocket LH only within the range of zero-lift (in range where it can be turned lightly by hand).

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Install the timing chain LH and the timing chain guide LH.

Match the timing chain mark (blue) to the alignment mark of the crank sprocket.
Match the timing chain mark (pink) to the timing mark position of the intake cam sprocket LH.
Match the timing chain mark (pink) to the timing mark position of the exhaust cam sprocket LH.

Install timing chain guide LH.

Tightening torque:

6.4 N.m (0.7 kgf-m, 4.7 ft-lb)

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Install new O-rings to the cylinder block LH.

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Install the chain tensioner lever LH (A) and chain tensioner LH.
Tightening torque:

8.5 N.m (0.9 kgf-m, 6.3 ft-lb)

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Pull out the stopper pin from the chain tensioner LH.
CAUTION:
Confirm the following before pulling out the stopper pin.
- Matching of the timing chain mark (blue) to the alignment mark of the crank sprocket.
- Matching of the timing chain mark (pink) to the timing mark position of the intake cam sprocket LH.
- Matching of the timing chain mark (pink) to the timing mark position of the exhaust cam sprocket LH.
NOTE: If the stopper pin cannot be removed, lift the chain tension lever LH to remove as shown in the figure.

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When the cam sprocket LH has been removed, and the cam carrier LH has been disassembled

NOTE: Follow also steps below when the cam sprocket LH has been removed, and the cam carrier LH has been disassembled.

Using the ST, tighten the bolts which hold the cam sprocket LH.

Preparation tool:

ST: SOCKET (18270KA010)

Tightening torque:

18 N.m (1.8 kgf-m, 13.3 ft-lb)

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Using the ST, turn the crankshaft clockwise, and make sure that there are no abnormal conditions.
CAUTION: Always make sure to perform this confirmation.

Preparation tool:

ST: CRANKSHAFT SOCKET (18252AA000)

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Using the ST and by turning the crankshaft, align the alignment mark of crank sprocket, the alignment mark (protrusion) of the intake cam sprocket LH and the alignment mark (protrusion) of the exhaust cam sprocket LH to the positions as shown in the figure.
NOTE: If the alignment marks are aligned to the positions as shown in the figure, the crankshaft key is located at six o'clock position.

Preparation tool:

ST: CRANKSHAFT SOCKET (18252AA000)

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Install the timing chain RH. Ref. to MECHANICAL (H4DO)>Timing Chain Assembly>INSTALLATION>TIMING CHAIN LH .