Timing Chain Assembly: Installation

1. Insert the screw, spring pin and plunger into the tensioner body.
2. As shown in the figure, turn the rubber mat counterclockwise while holding the chain tensioner from above by hand.
   NOTE: Degrease the contact surface between the plunger head and rubber mat, so that they do not slip.
   Fig 1: Degreasing Contact Surface Between Plunger Head And Rubber Mat

   Courtesy of SUBARU OF AMERICA, INC.
3. Insert the stopper pin into the hole on the chain tensioner body.

ST 18252AA000 CRANKSHAFT SOCKET

Fig 3: Identifying Top Mark On Crank Sprocket

Courtesy of SUBARU OF AMERICA, INC.

ST 499977500 CAM SPROCKET WRENCH

Fig 4: Aligning Intake Cam Sprocket To Twelve O'Clock Position

Courtesy of SUBARU OF AMERICA, INC.

ST 499977500 CAM SPROCKET WRENCH

Fig 5: Aligning Exhaust Cam Sprocket To Twelve O'Clock Position

Courtesy of SUBARU OF AMERICA, INC.

ST 18252AA000 CRANKSHAFT SOCKET

Fig 6: Identifying Top Mark On Crank Sprocket

Courtesy of SUBARU OF AMERICA, INC.

Tightening torque: 

16 N.m (1.6 kgf-m, 11.8 ft-lb) 

Fig 7: Identifying Main Chain Guide Mounting Bolts With Tightening Torques

Courtesy of SUBARU OF AMERICA, INC.

1. Match the timing chain mark (gold) to the timing mark position of the idler sprocket.
2. Align the idler sprocket timing mark at six o'clock position, and install the idler sprocket and timing chain.
3. Make sure that the timing chain mark (gold) is located at twelve o'clock position on the crank sprocket.
4. Use the ST to lock the idler sprocket, and install the idler sprocket bolt.

ST1 18355AA000 PULLEY WRENCH

ST2 18334AA000 PULLEY WRENCH PIN SET

Tightening torque: 

120 N.m (12.2 kgf-m, 88.5 ft-lb) 

Fig 8: Identifying Gold And Timing Mark On Idler Sprocket And Timing Chain (Main)

Courtesy of SUBARU OF AMERICA, INC.

Tightening torque: 

16 N.m (1.6 kgf-m, 11.8 ft-lb) 

Fig 9: Identifying Chain Tensioner Lever (Main) Tightening Torque

Courtesy of SUBARU OF AMERICA, INC.

Tightening torque: 

16 N.m (1.6 kgf-m, 11.8 ft-lb) 

Fig 10: Identifying Chain Tensioner (Main) Mounting Bolts With Tightening Torque

Courtesy of SUBARU OF AMERICA, INC.

Tightening torque: 

16 N.m (1.6 kgf-m, 11.8 ft-lb) 

Fig 11: Identifying Chain Guide (LH) Mounting Bolts With Tightening Torque

Courtesy of SUBARU OF AMERICA, INC.

Tightening torque: 

6.4 N.m (0.7 kgf-m, 4.7 ft-lb) 

Fig 12: Identifying Chain Guide (LH: Between Cams) Mounting Bolts Tightening Torque

Courtesy of SUBARU OF AMERICA, INC.

1. Match the timing mark of intake cam sprocket (LH) to the timing chain mark (blue).
   Fig 13: Identifying Blue And Timing Mark On Intake Cam Sprocket (LH)

   Courtesy of SUBARU OF AMERICA, INC.
2. Match the timing mark of exhaust cam sprocket (LH) to the timing chain mark (blue).
   Fig 14: Identifying Blue And Timing Mark On Exhaust Cam Sprocket (LH)

   Courtesy of SUBARU OF AMERICA, INC.
3. Install the timing chain to the water pump sprocket.
   Fig 15: Identifying Water Pump Sprocket

   Courtesy of SUBARU OF AMERICA, INC.
4. Match the timing mark of idler sprocket to the timing chain mark (gold).
   Fig 16: Matching Timing Mark Of Idler Sprocket To Timing Chain Mark (Gold)

   Courtesy of SUBARU OF AMERICA, INC.

Tightening torque: 

16 N.m (1.6 kgf-m, 11.8 ft-lb) 

Fig 17: Identifying Chain Tensioner Lever (LH) With Tightening Torque

Courtesy of SUBARU OF AMERICA, INC.

Tightening torque: 

16 N.m (1.6 kgf-m, 11.8 ft-lb) 

Fig 18: Identifying Chain Tensioner (LH) With Tightening Torque

Courtesy of SUBARU OF AMERICA, INC.

Tightening torque: 

16 N.m (1.6 kgf-m, 11.8 ft-lb) 

Fig 19: Identifying Chain Guide (RH) Tightening Torque

Courtesy of SUBARU OF AMERICA, INC.

Tightening torque: 

6.4 N.m (0.7 kgf-m, 4.7 ft-lb) 

Fig 20: Identifying Chain Guide (RH: Between Cams) With Tightening Torque

Courtesy of SUBARU OF AMERICA, INC.

1. Match the timing mark of intake cam sprocket (RH) to the timing chain mark (blue).
   Fig 21: Matching Timing Mark Of Intake Cam Sprocket (RH) To Timing Chain Mark (Blue)

   Courtesy of SUBARU OF AMERICA, INC.
2. Match the timing mark of exhaust cam sprocket (RH) to the timing chain mark (blue).
   Fig 22: Matching Timing Mark Of Exhaust Cam Sprocket (RH) To Timing Chain Mark (Blue)

   Courtesy of SUBARU OF AMERICA, INC.
3. Match the timing mark of idler sprocket to the timing chain mark (gold).
   Fig 23: Matching Timing Mark Of Idler Sprocket To Timing Chain Mark (Gold)

   Courtesy of SUBARU OF AMERICA, INC.

Tightening torque: 

16 N.m (1.6 kgf-m, 11.8 ft-lb) 

Fig 24: Identifying Chain Tensioner Lever (RH) With Tightening Torque

Courtesy of SUBARU OF AMERICA, INC.

Tightening torque: 

16 N.m (1.6 kgf-m, 11.8 ft-lb) 

Fig 25: Chain Tensioner (RH) Mounting Bolts With Torque Specification

Courtesy of SUBARU OF AMERICA, INC.

1. Make sure that the timing mark of idler sprocket is aligned to three timing chain marks (gold).
2. Make sure that the twelve o'clock position on the crank sprocket is aligned to the timing chain (main) mark (gold).
3. Make sure that the LH side cam sprocket timing mark is aligned to the timing chain mark (blue).
4. Make sure that the RH side cam sprocket timing mark is aligned to the timing chain mark (blue).
5. Make sure that all bolts are tightened at the specified torque.