This Workshop Manual contains procedures for
service mechanics, including removal, disassembly,
inspection, adjustment, reassembly and
installation. Figures taken from registration
documents are given in metric units only. All other
figures are given in SI units with metric units in
brackets. Use the following manuals in combination
with this manual as required.
All information, illustrations and product
descriptions contained in this manual are current
as at the time of publication. We, however, reserve
the right to make changes at any time without prior
notice or obligation.
NOTE:
Given in [ ] are MITSUBISHI GENUINE PART numbers.
SPECIAL TOOLS
ToolNumberNameUse
MD998782Valve lifter setReplacing the lash adjuster
MB990767End yoke holderDHolding the crankshaft pulley
DHolding the camshaft sprocket
ToolUseNameNumber
ENGINE – Special Tools
11-3
MD998719Crankshaft pulley
holder pin
MD998715Pulley holder pin
MD998713Camshaft oil seal
installer
MD998727Oil pan removerRemoving the oil pan
DHolding the crankshaft pulley
DHolding the camshaft sprocket
Pressfitting the camshaft oil seal
MD998781Flywheel stopperSecuring the flywheel or drive plate
MD998776Crankshaft rear oil
seal installer
MB990938Handle
MD998382Crankshaft front oil
seal installer
Pressfitting the crankshaft rear oil seal
Installing the crankshaft front oil seal
MD998285Crankshaft front oil
seal guide
11-4
ToolUseNameNumber
ENGINE – Special Tools / Engine Adjustments
MB991654Cylinder head bolt
wrench
MD998767Tensioner pulley
socket wrench
Recommended
tool MZ203826
by Anzen
Jidosha or
MZ203827 by
Banzai
MD991453Engine hanger
Engine lifterSupporting the engine assembly during
assembly
Removing and reinstalling the cylinder head
bolt
Timing belt tension adjustment
removal and installation of the transmission
Auto tensioner
Indicator mark
B
A
ENGINE ADJUSTMENTS
1. DRIVE BELT TENSION CHECK
NOTE
Use of the auto tensioner eliminates the need for belt tension
adjustment. Check that the indicator mark on the auto
tensioner is in the range of A shown.
If it is outside the specified range (i.e., in range of B shown),
replace the drive belt.
(For the removal and installation of the drive belt, refer to
P.11-9.)
Good
Tool mounting hole
MAX
MIN
High-pressure
chamber
ENGINE – Engine Adjustments
2. AUTO TENSIONER CHECK
(1) Stop the engine from the idle speed and check that the
belt rests within the auto tensioner pulley width.
(2) Remove the drive belt.
(For the removal of the drive belt, refer to P.11-9.)
(3) Fit a spinner handle or similar tool into the tool mounting
hole of the auto tensioner and turn the tensioner clockwise
and counterclockwise to ensure that it does not bind.
(4) If step (1) or (3), or both, have been checked abnormally,
replace the auto tensioner.
(5) Reinstall the drive belt.
3. LASH ADJUSTER CHECK
NOTE
If an unusual knocking noise can be heard immediately after
the engine has started or while it is running and if that is
probably attributable to the lash adjuster, make the following
checks.
(1) Check the engine oil and add or change oil as necessary.
NOTE
(1) If the engine oil level is low, air is taken in through
the oil screen, entering the oil passage.
(2) If the oil level is too high, the cranks agitate oil causing
oil to trap a large amount of air.
(3) Air does not easily separate from a deteriorated oil
that can contain an increased amount of air.
When air trapped in oil for these reasons gets into the
high-pressure chamber of the lash adjuster, the air in
the high-pressure chamber is compressed to shrink the
lash adjuster excessively while the valve is opening,
resulting in an unusual noise occurring. This is the same
symptom developing when the valve clearance is adjusted
to an excessive value.
The problem in this case is gone when air is released
from the lash adjuster.
(2) Start the engine and carry out several cycles (10 or less)
of mild racing*.
If the noise is gone after racing, it indicates that air has
been released from the high-pressure chamber of the
lash adjuster, restoring the lash adjuster to normal
operating conditions.
*:Gradually (extending over a 30-sec. period) increase
the engine speed from idle speed to 3,000 r/min and
then reduce it down to the idle speed gradually
(extending over a 30-sec. period).
11-5
NOTE
(1) If the vehicle is parked on a slope for a long time,
the amount of oil in the lash adjuster will decrease,
causing air to get into the high-pressure chamber
when the engine is started.
(2) After the vehicle has been parked for a long time,
oil drains out of the oil passage and it takes a long
time for the oil to reach the lash adjuster. This can
cause air to get into the high-pressure chamber.
11-6
ENGINE – Engine Adjustments
Timing belt side
AA B B
ABAB
(3) If the noise is not eliminated by racing, follow these steps
to check the lash adjuster.
a.Stop the engine.
b.Bring no. 1 cylinder to TDC on the compression stroke.
c.Push the rocker arms indicated by arrow A on the
left to see if they go down.
d.Slowly turn the crankshaft clockwise 360_.
e.Perform the same step as step c for rocker arms
indicated by arrow B.
f.Push the part of the rocker arm which contacts the
top of the lash adjuster. If the rocker arm can be
easily moved down to the bottom, the lash adjuster
is defective, requiring replacement.
When the lash adjuster is replaced, be sure first to
bleed the lash adjuster of air before installation. Then,
perform steps a through e to ensure that no abnormal
symptoms are noted.
NOTE
(1) The leak-down test is an effective means to
accurately determine if the lash adjuster is
operational or not.
(2) For the leak-down test and bleeding procedures,
refer to ENGINE WORKSHOP MANUAL.
If the rocker arm is felt binding and cannot be
pushed downward as you push it, the lash adjuster
is operational. Check for other possible causes
for the noise.
MD998782
MD998782
(4) Lash adjuster replacement
Caution
From the cylinder from which the lash adjuster is
to be removed, turn the crankshaft to lower the piston,
as the valve contacts the piston when pushed down.
A rocker arm cannot be removed if it is lifted by the
cam. If this is the case, turn the crankshaft so that
the arm is not lifted.
a.Using the special tool, push the valve downward to
remove the roller rocker arm.
b.Remove the lash adjuster from the cylinder head.
c.Mount a brandnew lash adjuster which has been bled
of air in the cylinder head.
d.Using the special tool, lower the valve and install
the roller rocker arm.
NOTE
To mount the roller rocker arm, first place the pivot
side of the rocker arm on the lash adjuster, then push
down the valve; next, place the slipper side of the
rocker arm on the valve system side.
ENGINE – Engine Adjustments
4. LASH ADJUSTER REPLACEMENT
Refer to (4) of the preceding paragraph.
5. IGNITION TIMING CHECK
Check that ignition timing is at the standard value.
Standard value: approx. 5_BTDC
NOTE
Ignition timing is variable within about ±7_, even under normal
operating.
11-7
Crank angle
sensor connector
6. IDLE SPEED CHECK AND IDLE MIXTURE
CHECK
(1) Run the engine at 2,000 to 3,000 r/min for 2 minutes.
(2) Check the CO and HC contents at idle.
Standard value
CO contents: 0.6% or less
HC contents: 300 ppm or less
7. COMPRESSION PRESSURE CHECK
(1) Before inspection, check that the engine oil, starter and
battery are normal. In addition, set the vehicle to the
pre-inspection condition.
(2) Remove all of the spark plugs.
(3) Disconnect the crank angle sensor connector.
NOTE
Doing this will prevent the engine-ECU from carrying out
ignition and fuel injection.
(4) Cover the spark plug hole with a shop towel etc., and
after the engine has been cranked, check that no foreign
material is adhering to the shop towel.
Caution
(1) Keep away from the spark plug hole when
cranking.
(2) If compression is measured with water, oil, fuel,
etc., that has come from cracks inside the cylinder,
these materials will become heated and will gush
out from the spark plug hole, which is dangerous.
11-8
Compression gauge
ENGINE – Engine Adjustments
(5) Set compression gauge to one of the spark plug holes.
(6) Crank the engine with the throttle valve fully open and
measure the compression pressure.
Standard value
(at engine speed of 250 r/min): 11.5 kg/cm
Limit (at engine speed of 250 r/min): 9.7 kg/cm
2
2
(7) Measure the compression pressure for all the cylinders,
and check that the pressure differences of the cylinders
are below the limit.
Limit: Max. 1.0 kg/cm
2
(8) If there is a cylinder with compression or a compression
difference that is outside the limit, pour a small amount
of engine oil through the spark plug hole, and repeat
the operations in steps (5) through (7).
a.If the compression increases after oil is added, the
cause of the malfunction is a worn or damaged piston
ring and/or cylinder inner surface.
b.If the compression does not rise after oil is added,
the cause is a burnt or defective valve seat, or pressure
is leaking from the gasket.
(9) Connect the crank angle sensor connector.
(10)Install the spark plugs.
(11)Install the ignition coil and connect the ignition coil
connector.
(12)Erase the diagnosis codes by keeping the battery minus
(–) cable disconnected for more than 10 seconds.
NOTE
This will erase the diagnosis code resulting from the crank
angle sensor connector being disconnected.
Fuel pressure
regulator valve
Vacuum gauge
8. MANIFOLD VACUUM CHECK
(1) Before inspection, set the vehicle to the pre-inspection
condition.
(2) Connect a tachometer connector.
(3) Attach a three-way union to the vacuum hose between
the fuel pressure regulator valve and the intake manifold,
and connect a vacuum gauge.
(4) Start the engine and check that idle speed is within
standard value.
Standard value: 850 ± 50 r/min
5.Check the manifold vacuum at idling.
Limit: Min. 55 kPa {410 mmHg}
ENGINE – Crankshaft Pulley
CRANKSHAFT PULLEY
REMOVAL AND INSTALLATION
11-9
Pre-removal Operation
DUnder Cover Removal
1
Post-installation Operation
DDrive Belt Tension Adjustment (Refer to P.11-4.)
DUnder Cover Installation
25 {2.5}
2
Removal steps
AA"1. Drive belt
2. Crankshaft pulley
Auto tensioner
Hole in arm
Hole in bracket
Unit: Nm {kgf@m}
REMOVAL SERVICE POINT
AA" DRIVE BELT REMOVAL
(1) Align the hole in the auto tensioner bracket with that
in the arm and insert a screwdriver into the holes.
(2) Remove the drive belt.
Phillips
screwdriver
11-10
ENGINE – Camshaft and Camshaft Oil Seal
CAMSHAFT AND CAMSHAFT OIL SEAL
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
(1) Engine Coolant Draining and Refilling
(2) Air Hose C Removal and Installation
(Refer to GROUP 15 – Intercooler.)
(3) Spark Plug Cable and Ignition Coil Assembly Removal
and Installation
4
6
2
10 {1.0}
14
15
(4) Air Pipe Removal and Installation
(Refer to GROUP 15 – Air Control Valve.)
(5) Timing Belt Removal and Installation
(Refer to P.11-21.)
9 {0.9}
1
5
3
3.4 {0.35}
20 {2.0}
7
22 {2.2}
8
12 – 15 {1.2 – 1.5}
9
10
Removal steps
1. Breather hose connection
2. PCV hose connection
3. Crank angle sensor bracket connection
4. Control harness connection
5. Rocker cover
6. Radiator upper hose connection
7. Cover
"EA 8. Cam position sensing cylinder
17 16
13
12
88 {9.0}
11
Unit: Nm {kgf@m}
9. Cam position sensor support
10. Semi-circular packing
AA""DA 11. Camshaft sprocket
"CA 12. Camshaft oil seal
"BA 13. Front cam cap
"BA 14. Rear cam cap
"BA 15. Cam cap
"AA 16. Camshaft (exhaust side)
"AA 17. Camshaft (intake side)
ENGINE – Camshaft and Camshaft Oil Seal
Grease and adhesive application points
11-11
26
10 mm
φ 3 mm
Semi-drying sealant:
THREEBOND 1207F
10 mm
Semi-drying sealant: THREEBOND 1207D
Semi-drying sealant: THREEBOND 1207D
10 mm
Timing belt side
Timing belt side
Lip
Engine oil
MB990767
MD998719
Camshaft sprocket side
Camshaft (exhaust side)
Slit
REMOVAL SERVICE POINT
AA" CAMSHAFT SPROCKET REMOVAL
INSTALLATION SERVICE POINTS
"AA CAMSHAFT INSTALLATION
(1) Apply engine oil to the cams and journals of the camshaft.
(2) Mount the camshaft on the cylinder head.
Caution
Make sure that the camshaft has a unique orientation
for installation, the intake side and exhaust side. The
exhaust camshaft has a slit in the rear end face.
11-12
Approx. 12_
Dowel pin
ENGINE – Camshaft and Camshaft Oil Seal
"BA CAM CAP / REAR CAP / FRONT CAM CAP
INSTALLATION
(1) Locate the camshaft dowel pins as illustrated.
Intake side
Exhaust side
(2) Temporarily tighten cam cap in two to three steps, then
torque it to specification.
Tightening torque: 20 Nm {2.0 kgf@m}
"CA CAMSHAFT OIL SEAL INSTALLATION
(1) Apply engine oil to the entire periphery of the oil seal
lip.
(2) Pressfit the oil seal as shown.
ID paint
MD998713
90_
Dowel pin
"DA CAMSHAFT SPROCKET INSTALLATION
As you did during removal, secure the camshaft sprocket
with the special tool and tighten bolt to specification.
Tightening torque: 88 Nm {9.0 kgf@m}
"EA CAM POSITION SENSING CYLINDER
Install the cam position sensing cylinder so that the ID paint
on the cam position sensing cylinder is 90_ with respect to
the camshaft dowel pin as shown.
OIL PAN
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operation
(1) Under Cover Removal and Installation
(2) Front Exhaust Pipe Removal and Installation
(Refer to GROUP 15.)
ENGINE – Oil Pan
(3) Oil Level Gauge Removal and Installation
(4) Engine Oil Draining and Supplying
Apply a small amount of engine oil to the entire circumference
of the oil seal lip.
Pressfit the oil seal until it is flush with the chamfered end
of the oil pump case.
MD998382
MD998285
(Lubricate outer
circumference with oil)
ENGINE – Cylinder Head Gasket
CYLINDER HEAD GASKET
REMOVAL AND INSTALLATION
11-17
Pre-removal Operation
(1) Fuel Discharge Prevention
(2) Engine Oil Removal
(3) Strut Tower Bar Removal
(4) Timing Belt Removal (Refer to P.11-21.)
(5) Thermostat Case Assembly Removal
(Refer to GROUP 14 – Water Hose Pipe.)
(6) Front Exhaust Pipe Removal (Refer to GROUP 15.)
Delivery pipe
19
15
18
O-ring
Engine oil
16
18
10
17
8
9
Post-installation Operation
(1) Front Exhaust Pipe Installation
(Refer to GROUP 15.)
(2) Thermostat Case Assembly Installation
(Refer to GROUP 14 – Water Hose Pipe.)
(3) Engine Oil Filling
(4) Timing Belt Installation (Refer to P.11-21.)
(5) Strut Tower Bar Installation
(6) Accelerator Cable Adjustment
Loosen the bolts in 2 or 3 steps in order of the numbers
shown in the illustration, and remove the cylinder head
assembly.
11-19
Intake side
Exhaust side
Washer
A
Cylinder
head
Front of engine
Cylinder head bolt
(Engine
oil)
INSTALLATION SERVICE POINTS
"AA CYLINDER HEAD GASKET INSTALLATION
(1) Wipe off all oil and grease from the gasket mounting
surface.
(2) Install so that the shapes of the cylinder head holes match
the shapes of the respective cylinder head gasket holes.
"BA CYLINDER HEAD BOLT INSTALLATION
(1) When installing the cylinder head bolts, the length below
the head of the bolts should be within the limit.
If it is outside the limit, replace the bolts.
Limit (A): 99.4 mm
(2) Apply a small amount of engine oil to the thread section
and the washer of the cylinder head bolt.
11-20
MB991654
Intake side
Exhaust side
Front of engine
ENGINE – Cylinder Head Gasket
(3) Tighten the bolts by the following procedure.
StepOperation
1Tighten to 78 Nm {8.0 kgf@m} in the order shown in the
illustration.
2Fully loosen in the reverse order of that shown in the
illustration.
3Tighten to 20 Nm {2.0 kgf@m} in the order shown in the
illustration.
4Mark the head of the cylinder head bolt and cylinder head
by paint, then tighten 90_ of a turn in the order shown in
the illustration.
5Tighten 90_ of a turn in the order shown in the illustration.
Check that the painted mark of the head bolt is lined up
with that of the cylinder head.
Caution
(1) Always make a tightening angle just 90_. If it is less
than 90_, the head bolt will be loosened.
(2) If it is more than 90_, remove the head bolt and repeat
the procedure from step 1.
Step 4
90_
Painted mark
Gasket
Step 5
Painted mark
Printed portion
90_
"CA OIL RETURN PIPE GASKET INSTALLATION
Install the gasket with the printed portion toward the oil pan.
"DA HIGH-PRESSURE FUEL HOSE INSTALLATION
(1) Apply a small amount of new engine oil to the O-ring,
then fit the O-ring in the delivery pipe.
Caution
Do not let any engine oil get into the delivery pipe.
(2) Check that the high pressure hose turns smoothly.
If the hose does not turn smoothly, the O-ring is probably
being clamped. Disconnect the high-pressure fuel hose
and check the O-ring for damage. After this, re-install
the hose to the delivery pipe and check that the hose
turns smoothly.
(3) Tighten the mounting bolts to the specification.
(1) If the timing belt is to be reused, chalk an arrow mark
on the back surface of the belt so that the belt can be
reinstalled in the same direction.
(2) Place the exhaust camshaft sprocket in a position where
the timing mark for No. 1 cylinder is positioned about
one tooth before the top dead center of the compression
stroke.
Caution
The camshaft sprocket on the exhaust side can turn
very easily because of the valve spring tension. Use
care not to allow your fingers to get caught by the
sprocket.
(3) Loosen the lock nut of the tensioner pulley, then remove
the timing belt.
AB" OIL PUMP SPROCKET REMOVAL
(1) Remove the plug on the left side of cylinder block.
(2) Insert a screwdriver (shank diameter 8 mm) to block the
counterbalance shaft.
(3) Loosen the flange bolt.
(4) Remove the oil pump sprocket.
AC" CRANKSHAFT BOLT LOOSENING
AD" CRANKSHAFT SPROCKET REMOVAL
If it is difficult to remove the sprocket, use the special tool.
ENGINE – Timing Belt
AE" TIMING BELT “B” REMOVAL
Make an arrow mark on the back of the timing belt indicating
the direction of rotation so it may be reassembled in the
same direction if it is to be reused.
6EN1322
AF" COUNTERBALANCE SHAFT SPROCKET
REMOVAL
11-23
AG" CRANKSHAFT SPROCKET “B” REMOVAL
If it is difficult to remove the sprocket, use the special tool.
AH" CAMSHAFT SPROCKET BOLT LOOSENING
Use a wrench to hold the hexagonal part of the camshaft,
and then remove the camshaft sprocket mounting bolt.
INSPECTION
TIMING BELT
Replace belt if any of the following conditions exist.
(1) Hardening of back rubber.
Back side is glossy without resilience and leaves no indent
when pressed with fingernail.
11-24
ENGINE – Timing Belt
Peeling of
canvas
Cracks on rib root
Cracks
Tooth missing
Cracks
Cracks
on sides
(2) Cracks on rubber back.
(3) Cracks of canvas.
(4) Cracks on rib root.
(5) Cracks on belt sides.
(6) Abnormal wear of belt sides.
NOTE
The sides are normal if they are sharp as if cut by a
knife.
(7) Abnormal wear on teeth.
Initial stage:
Canvas on load side tooth flank worn (Fluffy canvas
fibers, rubber gone and color changed to white, and
unclear canvas texture)
Final stage:
Canvas on load side tooth flank worn down and rubber
exposed (tooth width reduced)
(8) Missing tooth.
12 mm
98 to 196 N {10 to 20 kgf}
Movement
6EN1033
AUTO TENSIONER
(1) Check the auto tensioner for possible leaks and replace
as necessary.
(2) Check the rod end for wear or damage and replace as
necessary.
(3) Measure the rod protrusion. If it is out of specification,
replace the auto tensioner.
Standard value: 12 mm
(4) Press the rod with a force of 98 – 196 N {10 – 20 kgf}
and measure its protrusion. If it is out of specification,
replace the auto tensioner.
Standard value: 1 mm or less
ENGINE – Timing Belt
INSTALLATION SERVICE POINTS
"AA CAMSHAFT SPROCKET BOLT TIGHTENING
Using a wrench, hold the camshaft at its hexagon and tighten
the bolt to the specification.
Caution
Locking the camshaft sprocket with a tool damages the
sprocket.
11-25
Apply sealant
"BA ENGINE SUPPORT BRACKET LEFT
INSTALLATION
Coat the bolts illustrated with sealant before tightening.
Specified sealant: THREEBOND 1207F or equivalent
"CA SEALANT APPLICATION ON SEMI-CIRCULAR
PACKING
Apply sealant to the areas indicated in the illustration.
Specified sealant: THREEBOND 1212D or equivalent
10 mm
Semi-circular
packing
Cylinder head
Apply
sealant
10 mm
11-26
10 mm
ENGINE – Timing Belt
"DA SEALANT APPLICATION ON ROCKER COVER
Apply sealant to the areas indicated in the illustration.
Specified sealant: THREEBOND 1212D or equivalent
10 mm
Apply sealant
10 mm
Apply sealant
Spacer
Chamfer
10 mm
Oil seal
Apply sealant
"EA SPACER INSTALLATION
(1) Apply very thin coat of oil to the outer periphery of the
spacer (oil seal contacting surface).
(2) Install the spacer with the chamfered end toward the
oil seal. Mounting in the reverse direction can damage
the oil seal lip.
"FA COUNTERBALANCE SHAFT SPROCKET
INSTALLATION
Timing
marks
Timing
marks
"GA TIMING BELT “B” INSTALLATION
(1) Align timing marks on the crankshaft sprocket “B” and
counterbalance shaft sprocket with the marks on the front
case respectively.
(2) Install the timing belt “B” on the crankshaft sprocket “B”
and counterbalance shaft sprocket. There should be no
slack on the tension side.
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