Camshaft, CMP Actuator, Valve Lash Adjuster and Valve Rocker Arm Removal and Installation

Camshaft, CMP Actuator, Valve Lash Adjuster and Valve Rocker Arm Removal and Installation

Reference: Camshaft, CMP Actuator, Valve Lash Adjuster and Valve Rocker Arm Components:N32A

Removal

NOTE: For identification of each cylinder and bank, refer to Precaution for Identification of Cylinder and Bank:N32A.

1) Remove cylinder head cover.
2) Remove CMP sensor.
3) Make sure that the flat sections (1) of camshafts are parallel to cylinder head (2).





4) Hold timing chain using special tool as follows.

CAUTION: Do not remove special tool until camshaft and timing chain are installed. If special tool is removed before operations are completed, timing chain may not be installed correctly.

Special Tool
(A): 09918-57800
a) Insert special tool, align groove (1) of special tool and top surface (2) of cylinder head as shown in figure.





b) Tighten special tool by hand until special tool hangs in timing chain (1) as shown in figure.

NOTE: When tightening special tool, insert feet (3) of special tool into pocket (2) of timing chain to avoid misalignment of timing chain.





c) Rotating hexagonal section of intake and exhaust camshafts inward with wrench or the like, tighten special tool by hand and fix timing chain.





5) Give match marks (1) on CMP actuator and timing chain as shown in figure.





6) With hexagonal section of camshaft held stationary with wrench or the like, remove CMP actuator bolt (1).





7) Loosen camshaft housing bolts in numerical order ("1" - "16") shown in figure, and remove intake and exhaust camshafts.








8) Remove intake and exhaust CMP actuators.
9) Remove valve lash adjusters (1) and valve rocker arms (2).





Installation
1) Apply engine oil to sliding part of valve lash adjusters and valve rocker arms, and install them to cylinder head.

NOTE: Do not expose valve lash adjuster to excessive shock so as to prevent oil leakage.

2) Install new seal rings (1) to camshafts (2) as shown in figure.

NOTE: Position end gap of seal ring in a specified range.








3) Confirm identification mark (1) of camshafts, to install them to the correct positions in cylinder heads.








4) Apply engine oil to sliding part of camshafts, install camshafts to cylinder head as follows.
a) Align match marks (1) on CMP actuators and timing chain, install intake and exhaust CMP actuators.





b) Align lock pin (1) of CMP actuator with groove (2) of camshaft, install CMP actuator bolt by hand.





c) That the flat sections (1) of camshafts are parallel to cylinder head (2).





d) Install camshaft housings as indicated by embossed mark.








e) Tighten new camshaft housing bolt to specified torque in numerical order ("1" - "16") shown in figure evenly and gradually.

NOTE: Do not apply engine oil to camshaft housing bolt.

Tightening torque
Camshaft housing bolt* (a): 10 Nm (1.0 kg-m, 7.5 lbf-ft)








f) With hexagonal section of camshaft held with wrench or the like, install CMP actuator bolt to specified torque.
Tightening torque
CMP actuator bolt (a): 58 Nm (5.9 kg-m, 43.0 lbf-ft)





5) Remove special tool.
Special Tool
(A): 09918-57800





6) Install CMP sensors.
7) Install cylinder head covers.
8) Install delivery pipe.
9) Install ignition coils.
10) Install intake upper manifold.
11) Refill cooling system with coolant.
12) Install engine cover.
13) Connect negative cable to battery.
14) Upon completion of installation, turn ignition switch to ON position without starting engine and check for fuel leaks.
15) Finally, start engine and check for engine coolant leaks.