Timing Chain Assembly: Installation

CAUTION:

During installation, be careful to prevent foreign objects from attaching to or mixing with assembled components.
Apply engine oil to chain guide, chain tensioner lever, and idler sprocket during installation.

Preparation for installation of chain tensioner.
1. Put the screw, spring, pin and tension rod into the tensioner body.
2. While pressing tensioner onto rubber mat, twist it left and right to shorten tension rod. Then set a thin pin into the holes between tension rod and tensioner body to hold it.
NOTE: Carry out the work on rubber mat or other nonslip material.

Fig 1: Pressing Tensioner Onto Rubber Mat
Courtesy of SUBARU OF AMERICA, INC.
Using ST, align "top mark" on crankshaft sprocket at 9 o'clock position as shown in the figure.
ST 18252AA000 CRANKSHAFT SOCKET

Fig 2: Aligning Top Mark On Crankshaft Sprocket At 9 O'Clock Position
Courtesy of SUBARU OF AMERICA, INC.
Using ST, align four key grooves on camshaft sprocket at 12 o'clock position as shown in the figure.
ST 18231AA000 CAMSHAFT SPROCKET WRENCH

Fig 3: Aligning Four Key Grooves On Camshaft Sprocket At 12 O'Clock Position
Courtesy of SUBARU OF AMERICA, INC.
Rotate crankshaft sprocket clockwise to align "top mark" at 12 o'clock position as shown in the figure. (Piston # 1 is at TDC.)
CAUTION: Do not rotate crankshaft and camshaft sprockets until timing chain is completely routed.

Fig 4: Rotating Crankshaft Sprocket Clockwise To Align Top Mark At 12 O'Clock Position
Courtesy of SUBARU OF AMERICA, INC.
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 timing chain LH.
1. Align the timing mark (B) on crankshaft sprocket with the matching mark (A) on timing chain LH.
  
  Fig 6: Aligning Timing Mark (B) On Crankshaft Sprocket With Matching Mark (A) On Timing Chain LH
  Courtesy of SUBARU OF AMERICA, INC.
2. Route timing chain LH on idler sprocket (Lower), water pump, exhaust cam sprocket, and intake cam sprocket in order.
  CAUTION: Make sure that matching marks on the timing chain (A) and camshaft sprocket (B) are aligned the same way as the one on crankshaft sprocket.
  
  Fig 7: Routing Timing Chain LH On Idler Sprocket (Lower), Water Pump, Exhaust Cam Sprocket, And Intake Cam Sprocket In Order
  Courtesy of SUBARU OF AMERICA, INC.
3. Install 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 chain guide. (Left-hand between cams)
  Tightening torque:
  
  6.3N.m (0.64 kgf-m, 4.6 ft-lb)
  
  NOTE: Replace mounting bolt with a new one.
  
  Fig 9: Installing Chain Guide (Left-Hand Between Cams)
  Courtesy of SUBARU OF AMERICA, INC.
5. Install chain guide (LH).
  Tightening torque:
  
  16 N.m (1.6 kgf-m, 11.6 ft-lb)
  
  Fig 10: Installing Chain Guide (LH)
  Courtesy of SUBARU OF AMERICA, INC.
6. Install chain tensioner lever LH.
  Tightening torque:
  
  16 N.m (1.6 kgf-m, 11.6 ft-lb)
  
  Fig 11: Installing Chain Tensioner Lever LH
  Courtesy of SUBARU OF AMERICA, INC.
7. Install chain tensioner LH.
  Tightening torque:
  
  16 N.m (1.6 kgf-m, 11.6 ft-lb)
  
  Fig 12: Installing Chain Tensioner LH
  Courtesy of SUBARU OF AMERICA, INC.
Install timing chain RH.
1. On idler sprocket (Lower), align matching marks on timing chains LH and RH.
  
  Fig 13: Installing Timing Chain RH
  Courtesy of SUBARU OF AMERICA, INC.
2. Route timing chain RH on intake cam sprocket and then exhaust cam sprocket.
  CAUTION: Make sure that matching marks on the timing chain (A) and camshaft sprocket (B) are aligned the same way as the one on crankshaft sprocket.
  
  Fig 14: Routing Timing Chain RH On Intake Cam Sprocket And Then Exhaust Cam Sprocket
  Courtesy of SUBARU OF AMERICA, INC.
3. Install chain guide (RH).
4. Install chain tensioner lever (RH).
  Tightening torque:
  
  16 N.m (1.6 kgf-m, 11.6 ft-lb)
  
  Fig 15: Installing Chain Tensioner Lever (RH)
  Courtesy of SUBARU OF AMERICA, INC.
5. Install timing chain guide RH No. 1.
  Tightening torque:
  
  6.3 N.m (0.64 kgf-m, 4.6 ft-lb)
  
  NOTE: Replace mounting bolt with a new one.
  
  Fig 16: Installing Timing Chain Guide RH No. 1
  Courtesy of SUBARU OF AMERICA, INC.
6. Install the chain tensioner (RH).
  Tightening torque:
  
  16 N.m (1.6 kgf-m, 11.6 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) to the range between 8.4 mm (0.331 in) to 8.6 mm (0.339 in). And install chain guide (Center).
  Tightening torque:
  
  7.8 N.m (0.8 kgf-m, 5.8 ft-lb)
  
  NOTE: Replace mounting bolt with a new one.
  
  Fig 18: Adjusting Clearance Between Chain Guide (RH) And Chain Guide (Center)
  Courtesy of SUBARU OF AMERICA, INC.
8. After checking the matching marks on each sprocket and corresponding timing chain are aligned, pull stopper pin out of chain tensioner.