Mitsubishi Outlander GS45X. Manual — part 1244
CYLINDER HEAD AND VALVES
TSB Revision
ENGINE OVERHAUL <2.4L ENGINE>
11B-51
INSTALLATION SERVICE POINTS
.
>>A<< VALVE STEM SEAL INSTALLATION
CAUTION
• The valve stem seal must not be reused.
• Do not damage the tappet wall during assembly.
• Be sure to use a special tool to install the valve stem
seal. Poor installation causes oil loss via valve guides.
• If oil is not applied, the valve stem seal may rise to the
surface after it is press fitted.
1. Apply a thin coat of engine oil to a new valve stem seal.
2. Use special tool MD998737 to press fit the valve stem seal
into the valve guide with the valve stem used as a guide.
.
>>B<< RETAINER LOCK INSTALLATION
Use a special tool MD998735, and MB992089 to compress the
valve spring and to install the retainer lock.
.
AK503378 AE
AK502742AD
MD998737
AK502741AD
MB992089
MD998735
CYLINDER HEAD AND VALVES
TSB Revision
ENGINE OVERHAUL <2.4L ENGINE>
11B-52
>>C<< CYLINDER HEAD GASKET / CYLINDER
HEAD ASSEMBLY INSTALLATION
1. Completely remove the liquid gasket on the upper plane of
the cylinder block and the lower plane of the cylinder head.
CAUTION
Sufficiently check that there is no residual oil on the place
where degreasing is performed. If fingerprints are left, do
not touch it with bare hands after the degreasing, since the
oils from your fingers will harm the seal ability.
2. Degrease the place specified in the illustration.
3. As shown in the illustration, apply a 2.5
± 0.5 mm (0.1 ± 0.02
inch) of sealant to the top face of cylinder block.
Specified sealant:
Three bond 1217G or exact equivalent
4. Install the cylinder head gasket.
NOTE: Check that the center of the liquid gasket is located
toward the cylinder gasket in the position specified in the
illustration.
5. As shown in the illustration, apply a 2.5
± 0.5 mm (0.1 ± 0.02
inch) of sealant to the top face of cylinder head gasket.
Specified sealant:
Three bond 1217G or exact equivalent
6. Install the cylinder head assembly.
.
AK602902AE
Top face of cylinder block
Degrease
Degrease
Bottom face of cylinder head
AK602942AD
Ø2 to Ø3 mm
(0.079 to 0.118 in)
Timing chain side
CYLINDER HEAD AND VALVES
TSB Revision
ENGINE OVERHAUL <2.4L ENGINE>
11B-53
>>D<< CYLINDER HEAD BOLT INSTALLATION
1. Install new cylinder head bolts and washers in the following
procedure.
NOTE: Cylinder head bolts and washers must not be
reused.
2. Apply an appropriate amount of engine oil to top and bottom
surfaces of washers and threaded portion of bolts.
3. Install cylinder head bolts to the cylinder head.
NOTE: Bolts and washers are different parts for bolts on the
timing chain side.
4. Tighten cylinder head bolts in several steps to the specified
tightening torque of 35
± 2 N⋅m (26 ± 1 ft-lb) according to the
assembly order.
5. Put a paint mark on all of cylinder head bolt heads and
cylinder head.
CAUTION
• When the tightening angle is smaller than the specified
tightening angle, the appropriate tightening capacity
cannot be secured.
• When the tightening angle is larger than the specified
tightening angle, remove the bolt to start from the
beginning again according to the procedure.
6. Tighten the cylinder head 90
° according to the tightening
order.
Tighten it further 90
° and make sure that the paint mark on
the cylinder head bolt is in a straight line with that on the
cylinder head.
INSPECTION
M1113007002545
.
CYLINDER HEAD
1. Check the cylinder head for water leakage, gas leakage,
damage or cracks before cleaning.
2. Completely remove oil, scale, sealant, carbon, etc. After
cleaning oil passages, blow air to make sure that they are
not clogged.
AK502392
8
10
9
7
3
5
1
2
6
4
AD
Timing chain side
AK502523AD
Paint mark
Paint mark
90˚
90˚
Paint mark
Paint mark
CYLINDER HEAD AND VALVES
TSB Revision
ENGINE OVERHAUL <2.4L ENGINE>
11B-54
CAUTION
The grinding limit shall be within 0.2 mm (0.008 inch) in
combination with the cylinder block to be assembled.
3. For the flatness on the cylinder head bottom, measure
distortion using a straight edge and free gauge. If the
distortion exceeds the limit, grind and repair it.
Distortion on bottom
Standard value: Within 0.05 mm (0.002 inch)
Limit: 0.2 mm (0.08 inch)
Grinding limit: 0.2 mm (0.008 inch)
Cylinder head height
Standard value: 128.5 mm (5.06 inch)
.
VALVE
1. Repair the valve seat if contact with the valve seat is poor,
uneven or broken.
2. Measure the margin.
If the limit is exceeded, replace the valve.
Standard value:
Intake 1.022 mm (0.0402 inch)
Exhaust 1.094 mm (0.0431 inch)
Limit:
Intake 0.522 mm (0.0206 inch)
Exhaust 0.594 mm (0.0234 inch)
3. Measure overall length of the valve.
If the limit is exceeded, replace the valve.
Standard value:
Intake 113.18 mm (4.456 inch)
Exhaust 105.89 mm (4.169 inch)
Limit:
Intake 112.68 mm (4.436 inch)
Exhaust 105.39 mm (4.149 inch)
.
VALVE SPRING
1. Measure free height of the spring.
If the limit is exceeded, replace the spring.
Standard value: 47.20 mm (1.858 inch)
2. Measure squareness of the spring.
If the inclination exceeds the limit, replace the spring.
Standard value: 2
° or less
Limit: 4
°
.
AK502740
AK305408AD
Margin
The bottom of valve
seat contact facet
AK305409AD
Length
AK305410AD
Free height
Squareness
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст