Timing chain (FA20)
Components Removal / installation
ENGINE MECHANICAL
TIMING CHAIN (FA20)
EXPLODED VIEW
REMOVAL
1. Timing chain cover SUB-ASSY removal
(Refer to 
)
)2. Chain SUB-ASSY removal (bank 1 side)
(1) Attach the SST to the crankshaft.
SST
18252AA000
(2) Turn the crankshaft using the SST to align the alignment marks of crankshaft timing sprocket, camshaft timing intake gear ASSY RH and camshaft timing exhaust gear ASSY RH.
Captions in illustration
| *a |
Alignment marks |
| *b |
Key |
NOTE:
At this time, the crankshaft timing sprocket key faces downward.
(3) Push down the chain tensioner slipper as shown in the figure and secure the plunger by inserting a 2.5 mm {0.098 in} dia. hex wrench into the holes of chain tensioner ASSY NO. 1 and stopper plate.
(4) Remove the two bolts and remove the chain tensioner ASSY NO. 1.
(5) Remove the chain tensioner slipper.
(6) Remove the bolt and remove the chain vibration damper NO. 1.
(7) Remove the chain SUB-ASSY.
CAUTION:
When the chain SUB-ASSY is removed, the valve heads contact each other and the valve stems may bend. Do not turn the intake camshaft RH and exhaust camshaft RH to the outside of the range of zero-lift (in range where they can be turned lightly by hand).
NOTE:
The removed parts must be organized by installation location.
3. Chain SUB-ASSY removal (bank 2 side)
(1) Attach the SST to the crankshaft.
SST
18252AA000
(2) Turn the crankshaft using the SST to align the alignment marks of crankshaft timing sprocket, camshaft timing intake gear ASSY LH and camshaft timing exhaust gear ASSY LH.
Captions in illustration
| *1 |
Key |
| *2 |
Alignment marks |
(3) Push up the chain tensioner slipper as shown in the figure and secure the plunger by inserting a wire (with a diameter of approx. 1 mm {0.039 in}) into the holes of chain tensioner ASSY NO. 2 and stopper plate.
(4) Remove the two bolts and remove the chain tensioner ASSY NO. 2.
(5) Remove the chain tensioner slipper.
(6) Remove the O-ring from the cylinder block (bank 2 side).
(7) Remove the bolt and remove the chain vibration damper NO. 1.
(8) Remove the chain SUB-ASSY.
CAUTION:
·When the chain SUB-ASSY is removed, the valve heads contact each other and the valve stems may bend. Do not turn the exhaust camshaft LH to the outside of the range of zero-lift (in range where they can be turned lightly by hand).
·At this time, the No. 1 piston and No. 4 piston are located near the TDC of compression stroke. If the intake camshaft LH is turned, the valve and the piston may contact and valve stem may bend. Do not turn the intake camshaft LH.
·At this time, the No. 1 piston and No. 4 piston are located near the TDC of compression stroke. If the intake camshaft LH is turned, the valve and the piston may contact and valve stem may bend. Do not turn the intake camshaft LH.
NOTE:
The removed parts must be organized by installation location.
(9) Remove the SST from the crankshaft.
INSTALLATION
1. Chain SUB-ASSY installation (bank 2 side)
CAUTION:
Be careful that the foreign matter is not into or onto the assembled component during installation.
NOTE:
Apply engine oil to all component parts of the chain SUB-ASSY.
(1) Attach the SST to the crankshaft.
SST
18252AA000
(2) Move the link plate in the direction of the arrow and press in the plunger.
Captions in illustration
| *1 |
Link plate |
| *2 |
Plunger |
(3) Insert a wire (with a diameter of approx. 1 mm {0.039 in}) into the stopper pin hole to secure the plunger.
NOTE:
If the stopper pin hole on the link plate and the stopper pin hole on the chain tensioner ASSY are not aligned, check that the first notch of plunger rack is engaged with the stopper tooth. If not engaged, retract the plunger a little so that the first notch of plunger rack is engaged with the stopper tooth.
Captions in illustration
| *1 |
First notch of rack |
| *2 |
Stopper tooth |
(4) Using the SST, align the alignment marks of camshaft timing intake gear ASSY LH and camshaft timing exhaust gear ASSY LH to the positions as shown in the figure.
SST
18355AA000
18334AA030
CAUTION:
To prevent valve damage, turn the camshaft timing intake gear ASSY LH and camshaft timing exhaust gear ASSY LH only within the range of zero-lift (in range where they can be turned lightly by hand).
Captions in illustration
| *1 |
Alignment marks |
(5) Align the mark plate (blue) of chain SUB-ASSY to the alignment mark position of crankshaft timing sprocket.
Captions in illustration
| *a |
Alignment marks |
| *b |
Timing mark |
| *c |
Mark plate (blue) |
| *d |
Mark plate (pink) |
(6) Align the mark plate (pink) of chain SUB-ASSY to the timing mark position of camshaft timing intake gear ASSY LH.
(7) Align the mark plate (pink) of chain SUB-ASSY to the timing mark position of camshaft timing exhaust gear ASSY LH.
(8) Apply engine oil to the sliding surface of chain vibration damper NO. 1 bolt.
(9) Install the chain vibration damper NO. 1 with the bolt.
Standard value:
Standard value:
Tightening torque=6.4N·m
{
65kgf·cm}
{4.7ft·lbf}
(10) Attach a new O-ring on the cylinder block (bank 2 side).
(11) Install the chain tensioner slipper.
(12) Install the chain tensioner ASSY NO. 2 with the two bolts.
Standard value:
Standard value:
Tightening torque=6.4N·m
{
65kgf·cm}
{4.7ft·lbf}
(13) Make sure that the chain SUB-ASSY is properly installed.
Captions in illustration
| *a |
Alignment marks |
| *b |
Timing mark |
| *c |
Mark plate (blue) |
| *d |
Mark plate (pink) |
(a) The mark (blue) of chain SUB-ASSY is aligned to the alignment mark position of crankshaft timing sprocket.
(b) The mark plate (pink) of chain SUB-ASSY is aligned to the timing mark position of camshaft timing intake gear ASSY LH.
(c) The mark plate (pink) of chain SUB-ASSY is aligned to the timing mark position of camshaft timing exhaust gear ASSY LH.
(14) Pull out the wire from the chain tensioner ASSY NO. 2.
NOTE:
Push up the chain tensioner slipper and press in the plunger of chain tensioner ASSY NO. 2 to pull out the wire.
(15) Attach the SST to the crankshaft.
SST
18252AA000
(16) Turn the crankshaft clockwise and make sure that there are no abnormal conditions.
CAUTION:
Always make sure to perform this confirmation.
(17) Remove the SST from the crankshaft.
2. Chain SUB-ASSY installation (bank 1 side)
CAUTION:
Be careful that foreign matter is not into or onto the assembled component during installation.
NOTE:
Apply engine oil to all component parts of the chain SUB-ASSY.
(1) Attach the SST to the crankshaft.
SST
18252AA000
(2) Move the link plate in the direction of the arrow and press in the plunger.
Captions in illustration
| *1 |
Link plate |
| *2 |
Plunger |
(3) Insert a 2.5 mm {0.098 in} dia. hex wrench into the stopper pin hole to secure the plunger.
Captions in illustration
| *1 |
First notch of rack |
| *2 |
Stopper tooth |
NOTE:
If the stopper pin hole on the link plate and the stopper pin hole on the chain tensioner ASSY are not aligned, check that the first notch of plunger rack is engaged with the stopper tooth. If not engaged, retract the plunger a little so that the first notch of plunger rack is engaged with the stopper tooth.
(4) Turn the crankshaft using the SST to align the alignment marks of crankshaft timing sprocket, camshaft timing intake gear ASSY LH and camshaft timing exhaust gear ASSY LH as shown in the figure.
Captions in illustration
| *1 |
Alignment marks |
NOTE:
If the marks are aligned to the positions as shown in the figure, the crankshaft key faces downward.
(5) Using the SST, align the alignment marks of camshaft timing intake gear ASSY RH and camshaft timing exhaust gear ASSY RH to the positions as shown in the figure.
SST
18355AA000
18334AA030
CAUTION:
To prevent valve damage, turn the camshaft timing intake gear ASSY RH and camshaft timing exhaust gear ASSY RH only within the range of zero-lift (in range where they can be turned lightly by hand).
Captions in illustration
| *1 |
Alignment marks |
(6) Align the mark plate (blue) of chain SUB-ASSY to the alignment mark position of crankshaft timing sprocket.
Captions in illustration
| *a |
Alignment marks |
| *b |
Timing mark |
| *c |
Mark plate (blue) |
| *d |
Mark plate (pink) |
(7) Align the mark plate (pink) of chain SUB-ASSY to the timing mark position of camshaft timing intake gear ASSY RH.
(8) Align the mark plate (pink) of chain SUB-ASSY to the timing mark position of camshaft timing exhaust gear ASSY RH.
(9) Apply engine oil to the sliding surface of chain vibration damper NO. 1 bolt.
(10) Install the chain vibration damper NO. 1 with the bolt.
Standard value:
Standard value:
Tightening torque=6.4N·m
{
65kgf·cm}
{4.7ft·lbf}
(11) Install the chain tensioner slipper.
(12) Install the chain tensioner ASSY NO. 1 with the two bolts.
Standard value:
Standard value:
Tightening torque=6.4N·m
{
65kgf·cm}
{4.7ft·lbf}
(13) Make sure that the chain SUB-ASSY is properly installed.
Captions in illustration
| *a |
Alignment marks |
| *b |
Timing mark |
| *c |
Mark plate (blue) |
| *d |
Mark plate (pink) |
(a) The mark plate (blue) of chain SUB-ASSY is aligned to the alignment mark position of crankshaft timing sprocket.
(b) The mark plate (pink) of chain SUB-ASSY is aligned to the timing mark position of camshaft timing intake gear ASSY RH.
(c) The mark plate (pink) of chain SUB-ASSY is aligned to the timing mark position of camshaft timing exhaust gear ASSY RH.
(14) Pull out the hexagon wrench from the chain tensioner ASSY NO.1.
(15) Attach the SST to the crankshaft.
SST
18252AA000
(16) Turn the crankshaft clockwise and make sure that there are no abnormal conditions.
CAUTION:
Always make sure to perform this confirmation.
(17) Remove the SST from the crankshaft.
3. Timing chain cover SUB-ASSY installation
(Refer to )
)