Timing Chain Assembly: Installation

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

NOTE:

Be careful that the foreign matter is not into or onto assembled component during installation.
Apply engine oil to the chain guide, chain tensioner lever and idler sprocket when installing.

Preparation for chain tensioner installation
1. Insert the screw, spring pin and tension rod into tensioner body.
2. While depressing the tensioner onto rubber mat, twist it to shorten tension rod. Then insert the thin pin into the hole between tension rod and tension body to keep shortened.
NOTE: Work on the rubber mat or other anti-skid materials.

Fig 1: Depressing Tensioner Onto Rubber Mat
Courtesy of SUBARU OF AMERICA, INC.
Using ST 18252AA000 CRANKSHAFT SOCKET, align the "Top mark" on crank sprocket to 9 o'clock position as shown in Fig 2

Fig 2: Aligning Top Mark On Crank Sprocket To 9 O'Clock Position
Courtesy of SUBARU OF AMERICA, INC.
Using ST, align the key groove on exhaust cam sprocket to 12 o'clock position as shown in Fig 3

Fig 3: Aligning Key Groove On Exhaust Cam Sprocket To 12 O'Clock Position
Courtesy of SUBARU OF AMERICA, INC.
Align the intake cam sprocket as shown in Fig 4 .

Fig 4: Aligning Intake Cam Sprocket
Courtesy of SUBARU OF AMERICA, INC.
Turn the crank sprocket clockwise, align the "Top mark" to 12 o'clock position (Piston #1 is in TDC position)
NOTE: Do not rotate the crank shaft and cam sprocket until the timing chain installing was completed.
Install the idler sprocket (lower).
Tightening torque:

69 N.m (7.0 kgf-m, 50.6 ft-lb)

Fig 5: Installing Idler Sprocket (Lower)
Courtesy of SUBARU OF AMERICA, INC.
Install the timing chain (LH).
1. Align the timing mark (B) on the crank sprocket with mark (A) on the timing chain (LH).
  
  Fig 6: Aligning Timing Mark On Crank Sprocket With Mark On Timing Chain (LH)
  Courtesy of SUBARU OF AMERICA, INC.
2. Install the routing of timing chain (LH) on idler sprocket (lower), water pump, exhaust cam sprocket (LH) and intake cam sprocket (LH).
  NOTE: Check that the mark on timing chain (A) and cam sprocket (B) is aligned as same as aligned on crank sprocket.
  
  Fig 7: Identifying Mark On Timing Chain And Cam Sprocket
  Courtesy of SUBARU OF AMERICA, INC.
3. Install the chain idler (upper).
  Tightening torque:
  
  69 N.m (7.0 kgf-m, 50.6 ft-lb)
  
  Fig 8: Installing Chain Idler (Upper)
  Courtesy of SUBARU OF AMERICA, INC.
4. Install the chain guide (LH: between cams).
  Tightening torque:
  
  6.4 N.m (0.65 kgf-m, 4.7 ft-lb)
  
  NOTE: Use a new installing bolt.
  
  Fig 9: Installing Chain Guide (LH: Between Cams)
  Courtesy of SUBARU OF AMERICA, INC.
5. Install the chain guide (LH).
  Tightening torque:
  
  16 N.m (1.6 kgf-m, 12 ft-lb)
  
  Fig 10: Installing Chain Guide (LH)
  Courtesy of SUBARU OF AMERICA, INC.
6. Install the chain tensioner lever (LH).
  Tightening torque:
  
  16 N.m (1.6 kgf-m, 12 ft-lb)
  
  Fig 11: Installing Chain Tensioner Lever (LH)
  Courtesy of SUBARU OF AMERICA, INC.
7. Install the chain tensioner (LH).
  Tightening torque:
  
  16 N.m (1.6 kgf-m, 12 ft-lb)
  
  Fig 12: Installing Chain Tensioner (LH)
  Courtesy of SUBARU OF AMERICA, INC.
Install the timing chain (RH).
1. Align the marks of timing chain LH and RH on the idler sprocket (lower).
  
  Fig 13: Aligning Marks Of Timing Chain LH And RH On Idler Sprocket (Lower)
  Courtesy of SUBARU OF AMERICA, INC.
2. Install the routing of timing chain (RH) on intake cam sprocket (RH), and then set the routing on exhaust cam sprocket.
  NOTE: Check that the mark on timing chain (A) and cam sprocket (B) is aligned as same as aligned on crank sprocket.
  
  Fig 14: Identifying Mark On Timing Chain And Cam Sprocket
  Courtesy of SUBARU OF AMERICA, INC.
3. Install the chain guide (RH).
4. Install the chain tensioner lever (RH).
  Tightening torque:
  
  16 N.m (1.6 kgf-m, 12 ft-lb)
  
  Fig 15: Installing Chain Tensioner Lever (RH)
  Courtesy of SUBARU OF AMERICA, INC.
5. Install the chain guide (RH: between cams).
  Tightening torque:
  
  6.4 N.m (0.65 kgf-m, 4.7 ft-lb)
  
  NOTE: Use a new installing bolt.
  
  Fig 16: Installing Chain Guide (RH: Between Cams)
  Courtesy of SUBARU OF AMERICA, INC.
6. Install the chain tensioner (RH).
  Tightening torque:
  
  16 N.m (1.6 kgf-m, 12 ft-lb)
  
  Fig 17: Installing Chain Tensioner (RH)
  Courtesy of SUBARU OF AMERICA, INC.
7. Adjust the clearance between chain guide (RH) and chain guide (center) within 8.4 - 8.6 mm (0.331 - 0.339 in). Install the chain guide (center).
  Tightening torque:
  
  7.8 N.m (0.8 kgf-m, 5.8 ft-lb)
  
  NOTE: Use a new installing bolt.
  
  Fig 18: Installing Chain Guide (Center)
  Courtesy of SUBARU OF AMERICA, INC.
8. Check that each mark on the sprocket and timing chain is matched, and then draw out the stopper pin from chain tensioner.