Timing Chain LH

WARNING: This page is about a different variant/trim than selected.

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.

Prepare to attach the chain tensioner LH.
1. Move the link plate (A) in the direction of arrow to press in the plunger (B).
  
  Fig 1: Pressing Plunger
  Courtesy of SUBARU OF AMERICA, INC.
2. With a 1.3 mm (0.05 in) dia. stopper pin or a 1.3 mm dia. hex wrench inserted into the stopper pin hole, secure the plunger.
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).

Fig 2: Inserting Stopper Into Pin Hole To Secure Plunger
Courtesy of SUBARU OF AMERICA, INC.
Check that the crank sprocket is located at the position shown in the figure. If not aligned, using 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.

ST 18252AA000 CRANKSHAFT SOCKET

Fig 3: Aligning Crank Sprocket
Courtesy of SUBARU OF AMERICA, INC.
Using ST and by turning the intake cam sprocket LH, align the alignment marks 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.
ST1 18355AA000 PULLEY WRENCH

ST2 18334AA020 PULLEY WRENCH PIN SET

Fig 4: Aligning Intake Cam Sprocket LH
Courtesy of SUBARU OF AMERICA, INC.
Using 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.

ST 18252AA000 CRANKSHAFT SOCKET

Fig 5: Turning Crankshaft 200° Counterclockwise
Courtesy of SUBARU OF AMERICA, INC.
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).

Fig 6: Aligning Exhaust Cam Sprocket LH
Courtesy of SUBARU OF AMERICA, INC.
Install the timing chain LH and the timing chain guide LH.
1. Match the timing chain mark (blue) to the alignment mark of the crank sprocket.
2. Match the timing chain mark (pink) to the timing mark position of the intake cam sprocket LH.
3. Match the timing chain mark (pink) to the timing mark position of the exhaust cam sprocket LH.
4. Install timing chain guide LH.
Tightening torque:

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

Fig 7: Timing Chain Alignment Mark And Position
Courtesy of SUBARU OF AMERICA, INC.
Install O-rings to the cylinder block LH.
NOTE: Use new O-rings.

Fig 8: Identifying O-Ring Of Cylinder Block LH
Courtesy of SUBARU OF AMERICA, INC.
Install the chain tensioner lever LH (A) and chain tensioner LH.
Tightening torque:

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

Fig 9: Identifying Chain Tensioner LH Bolts
Courtesy of SUBARU OF AMERICA, INC.
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.

Fig 10: Pulling Out Stopper Pin From Chain Tension lever LH
Courtesy of SUBARU OF AMERICA, INC.

Fig 11: Alignment Mark And Timing Chain Mark Position
Courtesy of SUBARU OF AMERICA, INC.
Using the ST, turn the crankshaft clockwise, and make sure that there are no abnormal conditions.
CAUTION: Always make sure to perform this confirmation.

ST 18252AA000 CRANKSHAFT SOCKET

Fig 12: Turning Crankshaft Clockwise
Courtesy of SUBARU OF AMERICA, INC.
Using ST and by turning the crankshaft, align the alignment marks of crank sprocket, intake cam sprocket LH and 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.

ST 18252AA000 CRANKSHAFT SOCKET

Fig 13: Identifying Alignment Marks Of Crank Sprocket
Courtesy of SUBARU OF AMERICA, INC.
Install the timing chain RH. Ref. to TIMING CHAIN RH , INSTALLATION, Timing Chain Assembly.