Mitsubishi Lancer Evolution VI. Manual — part 24
ENGINE –
Crankshaft and Flywheel
11-71
"
E
A
SEALANT APPLICATION TO OIL SEAL CASE
Specified sealant:
Mitsubishi Genuine Part No. MD970389 or equivalent
NOTE
(1) Be sure to install the case quickly while the sealant is
wet (within 15 minutes).
(2) After installation, keep the sealed area away from the
oil and coolant for approx. one hour.
INSPECTION
CRANKSHAFT OIL CLEARANCE (PLASTIGAGE
METHOD)
(1) Remove oil from the crankshaft journal and the crankshaft
bearing.
(2) Install the crankshaft.
(3) Cut the Plastigage to the same length as the width of
the bearing and place it on the journal in parallel with
its axis.
(4) Install the crankshaft bearing cap carefully and tighten
the bolts to the specified torque.
(5) Carefully remove the crankshaft bearing cap.
(6) Measure the width of the Plastigage at its widest part
by using a scale printed on the Plastigage package.
Standard value: 0.02 – 0.04 mm
Limit: 0.1 mm
CYLINDER BLOCK
(1) Visually check for scratches, rust, and corrosion.
Use also a flaw detecting agent for the check. If defects
are evident, correct, or replace.
(2) Using a straightedge and feeler gauge, check the block
top surface for warpage. Make sure that the surface is
free from gasket chips and other foreign matter.
Standard value: 0.05 mm
Limit: 0.1 mm
(3) If the distortion is excessive, correct within the allowable
limit or replace.
Grinding limit: 0.2 mm
Includes/combined with cylinder head grinding
Cylinder block height (when new): 284 mm
(4) Check cylinder walls for scratches and seizure. If defects
are evident, correct (bored to oversize) or replace.
Plastigage
Plastigage
ENGINE –
Crankshaft and Flywheel
11-72
(5) Using cylinder gauge, measure the cylinder bore and
cylindricity. If worn badly, correct cylinder to an oversize
and replace piston and piston rings. Measure at the points
shown in illustration.
Standard value:
Cylinder I.D. 85.00 – 85.03 mm
Cylindricity 0.01 mm or less
BORING CYLINDER
(1) Oversize pistons to be used should be determined on
the basis of the largest bore cylinder.
Piston size identification
Size
Identification mark
0.50 O.S.
50
1.00 O.S.
100
NOTE
Size mark is stamped on the piston top.
(2) Measure outside diameter of piston to be used. Measure
it in thrust direction as shown.
(3) Based on the measured piston O.D. calculate boring finish
dimension.
Boring finish dimension = Piston O.D. + (clearance
between piston O.D. and cylinder) – 0.02 mm
(honing margin)
(4) Bore all cylinders to the calculated boring finish dimension.
Caution
To prevent distortion that may result from temperature
rise during honing, bore cylinders, working from No.
2, No. 4, No. 1 to No. 3.
(5) Hone to final finish dimension (piston O.D. + clearance
between piston O.D. and cylinder).
(6) Check clearance between piston and cylinder.
Clearance between piston and cylinder:
0.02 – 0.04 mm
NOTE
When boring cylinders, finish all of four cylinders to same
oversize. Do not bore only one cylinder to an oversize.
ENGINE –
Throttle Body
11-73
THROTTLE BODY
DISASSEMBLY AND REASSEMBLY
1
2
3
4
5
6
7
3.5 Nm
3.5 Nm
Disassembly steps
A
A
" "
A
A
1. Throttle position sensor (with built-
in closed throttle position switch)
2. Idle speed control body assembly
3. O-ring
A
B
"
4. Throttle body
5. Fixed SAS
6. Speed adjusting screw
8. O-ring
NOTE
1.
The fixed SAS and the speed adjusting screw are
correctly adjusted at the factory and should not be
removed.
2.
If the fixed SAS should happen to have been
removed, carry out fixed SAS adjustment.
3.
If the speed adjusting screw should happen to have
been removed, carry out speed adjusting screw
adjustment.
ENGINE –
Throttle Body
11-74
DISASSEMBLY SERVICE POINTS
A
A
"
THROTTLE POSITION SENSOR AND IDLE AIR
CONTROL MOTOR REMOVAL
(1) Do not disassemble the sensor and motor.
(2) Do not immerse solvent to clean the sensor and motor.
Clean then with shop towel.
A
B
"
THROTTLE BODY REMOVAL
(1) Do not remove the throttle body.
(2) Check if the vacuum port or passage is clogged. Use
compressed air to clean the vacuum passage.
REASSEMBLY SERVICE POINT
"
A
A
THROTTLE POSITION SENSOR INSTALLATION
(1) Install the throttle position sensor to the throttle body
as shown in the diagram.
(2) Turn throttle position sensor 90
°
clockwise to set it, and
tighten screws.
(3) Check the continuity between terminal No. 3 (Idle throttle
position switch) and No. 4 (Earth).
Throttle valve condition
Continuity
Fully closed
Conductive
Fully open
No conductive
If there is no continuity with the throttle valve fully closed,
turn the throttle position sensor counterclockwise, and
then check again.
Throttle position sensor
Earth
TPS power supply
TPS output
Idle position switch
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