REMOVAL AND INSTALLATION



caution * Remove and assemble the marked parts in each cylinder unit.
Post-installation Operation
  • Drive Belt Tension Check (Refer to ).
  • Valve Clearance Check and Adjustment (Refer to ).





Camshaft removal steps


·
Timing belt upper cover (Refer to )

>>K<<
1.
Engine cover


2.
Engine cover bracket


3.
Rocker cover PCV hose connection


4.
Rocker cover breather hose connection


·
Air cleaner (Refer to GROUP 15, Air cleaner )


·
Ignition coils (Refer to GROUP 16, Ignition System - Ignition Coil )


5.
Control wiring harness connection


6.
Engine hanger

>>J<<
7.
Oil control valve

>>J<<
8.
O-ring


9.
Rocker cover assembly


10.
Rocker cover gasket


11.
Spark plug guide oil seals


12.
Accumulator assembly


·
Valve timing belt (Refer to ).




Camshaft removal steps


13.
Connector bracket

>>I<<
14.
Camshaft position sensor support


15.
Camshaft position sensing cylinder
<<A>>
>>H<<
16.
Camshaft sprocket

>>G<<
17.
Camshaft oil seal

>>F<<
18.
Exhaust rocker arm shaft caps
<<B>>
>>F<<
19.
Exhaust rocker arm and shaft assembly

>>E<<
20.
Inlet rocker arm shaft caps
<<B>>
>>E<<
21.
Inlet rocker arm and shaft assembly

>>D<<
22.
Camshaft


·
Water inlet fitting and thermostat case assembly (Refer to GROUP 14, Water Hose and Water Pipe ).


23.
Cylinder head plug


24.
Oil control valve filter



Valve stem seal removal steps


·
Timing belt upper cover (Refer to )


1.
Engine cover


2.
Engine cover bracket


3.
Rocker cover PCV hose connection


4.
Rocker cover breather hose connection


·
Air cleaner (Refer to GROUP 15, Air cleaner )


·
Ignition coils (Refer to GROUP 16, Ignition System - Ignition Coil )


5.
Control wiring harness connection


6.
Engine hanger


9.
Rocker cover assembly


10.
Rocker cover gasket


11.
Spark plug guide oil seals

>>F<<
18.
Exhaust rocker arm shaft caps
<<B>>
>>F<<
19.
Exhaust rocker arm and shaft assembly

>>E<<
20.
Inlet rocker arm shaft caps
<<B>>
>>E<<
21.
Inlet rocker arm and shaft assembly


25.
Spark plugs
<<C>>
>>C<<
26.
Valve spring retainer locks


27.
Valve spring retainer

>>B<<
28.
Inlet valve spring

>>B<<
29.
Exhaust valve spring

>>A<<
30.
Valve stem seals


31.
Valve spring seats

REMOVAL SERVICE POINTS



<<A>> CAMSHAFT SPROCKET REMOVAL



1.Use the following special tools to hold the camshaft sprocket.

  • Front hub and flange yoke holder (MB990767)
  • Pin (MD998719)
2.Loosen the camshaft sprocket mounting bolt and remove the camshaft sprocket.

<<B>> EXHAUST ROCKER ARM AND SHAFT ASSEMBLY/INLET ROCKER ARM AND SHAFT ASSEMBLY REMOVAL


caution Never disassemble the exhaust rocker arm and shaft assembly, and inlet rocker arm and shaft assembly.

<<C>> VALVE SPRING RETAINER LOCKS REMOVAL


caution When removing valve spring retainer locks, leave the piston of each cylinder in the TDC (Top Dead Centre) position. The valve may fall into the cylinder if the piston is not properly in the TDC position.

Use special tool valve spring compressor (MD998772) to compress the valve spring and then remove the valve spring retainer lock.

INSTALLATION SERVICE POINTS



>>A<< VALVE STEM SEALS INSTALLATION


1.Apply a small amount of engine oil to the valve stem seals.

2.
caution
  • Do not re-use the valve stem seal.
  • Special tool valve stem seal installer (MB991999) must be used to install the valve stem seal. Improper installation could result in oil leaking past the valve guide.
Use the special tool to fill a new valve stem seal in the valve guide using the valve stem area as a guide.

>>B<< EXHAUST VALVE SPRINGS/INLET VALVE SPRINGS INSTALLATION



Install the valve springs with its identification colour painted end facing the locker arm.

>>C<< VALVE SPRING RETAINER LOCKS INSTALLATION



Use special tool valve spring compressor (MD998772) to compress the valve spring and then install the valve spring retainer lock in the same manner as removal.

>>D<< CAMSHAFT INSTALLATION



Set the dowel pin of the camshaft in the position shown in the figure.

>>E<< INLET ROCKER ARM AND SHAFT ASSEMBLY/INLET ROCKER ARM SHAFT CAPS INSTALLATION



1.Place the inlet rocker shaft so that its 5.5 mm hole faces toward the cylinder head.
2.Install the inlet rocker arm shaft caps.
3.Tighten the inlet rocker shaft mounting bolts to the specified torque.
Tightening torque: 31 ± 3 N·m

>>F<< EXHAUST ROCKER ARM AND SHAFT ASSEMBLY/EXHAUST ROCKER ARM SHAFT CAPS INSTALLATION



1.Install the exhaust rocker shaft so that its notch is positioned as shown.
2.Install the exhaust rocker arm shaft caps.
3.Tighten the exhaust rocker shaft mounting bolts to the specified torque.
Tightening torque: 13 ± 1 N·m

>>G<< CAMSHAFT OIL SEAL INSTALLATION



1.Apply engine oil to the entire inner diameter of the oil seal lip.
2.Use special tool camshaft oil seal installer (MD998713) to press-fit the oil seal as shown.

>>H<< CAMSHAFT SPROCKET INSTALLATION



1.Use the following special tool as during removal to hold the camshaft sprocket.

  • Front hub and flange yoke holder (MB990767)
  • Pin (MD998719)
2.Tighten the camshaft sprocket mounting bolt to the specified torque.
Tightening torque: 89 ± 9 N·m

>>I<< CAMSHAFT POSITION SENSOR SUPPORT INSTALLATION


1.Remove sealant from the camshaft position sensor support and cylinder head surfaces.

2.Apply the sealant to the camshaft position sensor support flange in a continuous bead as shown in the illustration.
Specified sealant: MITSUBISHI GENUINE PART MD970389 or equivalent
note Install the camshaft position sensor support within 15 minutes after applying the sealant.
3.Install the camshaft position sensor support to the cylinder head.
4.
caution Wait at least one hour. Never start the engine or let engine oil or coolant touch the adhesion surface during that time.
Tighten the camshaft position sensor support mounting bolts to the specified torque.
Tightening torque: 14 ± 1 N·m

>>J<< O-RING/OIL CONTROL VALVE INSTALLATION



1.
caution
  • Never re-use the O-ring.
  • Before installing O-ring, wind the tape with the soft adhesion (sealing tape) around the oil passages cut-out area of engine oil control valve to prevent the damage. If the O-ring is damaged, it can be the cause of oil leak.
Apply a small amount of engine oil to the O-ring and then install it to the oil control valve.
2.Assemble the oil control valve to the cylinder head.
3.Tighten the oil control valve mounting bolt to the specified torque.
Tightening torque: 11 ± 1 N·m

>>K<< ENGINE COVER INSTALLATION



1.Engage the engine cover claws in the engine cover bracket.
2.Finger-tighten the engine cover mounting bolts in the order shown in the figure so that the engine cover can be moved by hand.
3.Tighten the engine cover mounting bolts to the specified torque in the order shown.
Tightening torque: 3.0 ± 0.5 N·m