MITSUBISHI SPYDER 1990 Service Repair Manual

ENGINE Head Gasket

(20 20 20
23
l Intake and exhaust camshafts(Refer to 23. Front exhaust pipe connection24. Gasket 25. Cylinder head bolt26. Cylinder head
27. Cylinder head gasket
REMOVAL SERVICE POINT
(A, RADIATOR UPPER HOSE DISCONNECTION
Place mating on the radiator hose hose clamp,
and then disconnect the radiator hose.

E N G I N E Cylinder Head
Unstretched bolt
‘Location of 110 mm (4.330 in.) short bolts.Step 4
Painted marks
Projection
Water outlet fitting
INSTALLATION SERVICE POINTS
CYLINDER HEAD
(1)Cylinder head bolts should be carefully before
reuse. If the threads are necked bolts should
be replaced.
Necking can be checked by holding a
edge against the threads. If all the threads do not contact
the scale, the bolt should be replaced.
(2) Before installing the bolts, the threads should be oiled
with clean engine oil.
(3) Tighten the cylinder head bolts in the sequence shown
in figure. Using the 4 step torque
method, tighten
according to the following values.
1) ‘Tighten center fasteners 1 thru 6 to 33 Nm (25
Then outer fasteners 7 thru 10 to 27 Nm (20
2 )Tighten center fasteners thru 6 to 67 Nm (50
Then outer fasteners 7 thru 10 to 27 Nm (20
3)Tighten center fasteners 1 thru 6 to 67 Nm (50
Then outer fasteners 7 thru 10 to 27 Nm (20
4) Turn all fasteners 1 10 turn. Do not use
torque wrench for this step.
Caution
1.Always make a just If it less
than
the will be loosened.
2. it is more than remove the head bolt and repeat
the procedure froni step 1.
RADIATOR UPPER HOSE CONNECTION
(1) each hose as far as the projection of the water
outlet fitting or water inlet fitting.
(2) Place mating marks on the radiator hose and
clamp, and then connect the radiator hose.
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E N G I N E Cylinder Head Gasket
HIGH-PRESSURE FUEL HOSE CONNECTION
When connecting the high-pressure fuel to the fuel rail,
apply a small amount of clean engine oil to the
and then insert, being careful not to the O-ring.
Caution
Do not let the engine oil get into the fuel rail.
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ENGINE Timing Belt.
TIMING BELT
REMOVAL AND INSTALLATION
Operationl Pulley Removal
(Refer to
Post-installation OperationlCrankshaft Pulley Installation (Refer to l Engine Adjustment
88 Nm
84
Nm
8.9
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Removal steps
1. Power steering oil pump tion2. Power steering oil pump bracket
3. Engine mount bracket assembly 4. Engine mount bracket 5. Front timing belt cover
6. Timing belt 7. Timing belt tensioner8. Tensioner pulley9. pulley

ENGINE Timing Belt
REMOVAL SERVICE POINTS
POWER STEERING OIL PUMP
Remove the power steering oil pump from the bracket with
the hose attached.
Place the removed power pump in a place where
it will not be a hindrance when removing and instal ling ‘the
timing belt, and tie it with a cord.
ENGINE MOUNT BRACKET ASSEMBLY REMOVAL
I
sprocket
pulley
Place a garage jack against the engine oil pan with a
of wood in between, jack up the engine so that weight
of the engine is no longer being applied to the eng ine mount
bracket, and then remove the mount bracket.
BELT REMOVAL.
Align timing marks. Loosen the timing belt remove
timing belt.
Caution Do not rotate the camshaft or crankshaft
afterremoving
the timing belt, or valve components may be
Always align timing marks before removing timing ‘b elt.
TIMING BELT TENSIONER REMOVAL
(1) When the tensioner is removed from the engine, it is
necessary to compress the plunger into the tensione r
body.
(2) Place the tensioner into a vise and slowly compress the
plunger.
Caution
Index the tensioner in the vise the way
installed on the engine.This is to ensure proper
pin orientation when the tensioner installed on the
engine.
(3) When the plunger is compressed into the tension er body,
install a pin through the body and plunger
plunger
in place until tensioner is installed.
Tensioner
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ENGINE Belt
Reference mark
T.D.C.
Align camshaft sprockettimingmarks together
side
Arra
mount
bracket Engine
mount
INSTALLATION SERVICE POINT
TIMING BELT BELT
INSTALLATION
(1) Set the crankshaft sprocket to TDC by aligning the
sprocket with the arrow on the oil pump housing.
(2) Set the camshafts timing marks together by alig ning
notches on sprockets.
(3) Move the crankshaft to notch before TDC.
(4) Install the timing belt. Starting at the crankshaft, go around
the water pump sprocket, idler pulley, sprockets
and then around the tensioner pulley.
(5) Move the crankshaft sprocket to to take belt
slack.Install the tensioner to block ‘but do not tighten
fasteners.
(6) Using a torque wrench on the tensioner pulley, apply
28 Nm (21
of torque to tensioner..
(7) With torque being applied to the tensioner pull ey, move
the tensioner up against the tensioner pulley brack et and
tighten fasteners to 31 Nm (23
(8) Pull the tensioner plunger pin. Pretension is correct when
the pin can be removed and installed.
(9) Rotate the crankshaft 2 revolutions and check t he
alignment of the timing marks. If marks are not ali gned
correctly, do it again.
ENGINE MOUNT BRACKET ASSEMBLY
INSTALLATION
Align the notches on the stopper with the engine mo unt bracket
with the arrow mark facing toward the shown direction. Then
install the stopper.
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CONTENTS
CAMSHAFT AND CAMFOLLOWER............28
COOLING SYSTEMCOMPONENTS.............21
CRANKSHAFT............................................55
CYLINDER HEADANDVALVE....................32
EXHAUST MANIFOLD.................................27
FUEL AND EMISSION CONTROL PARTS...
GENERAL INFORMATION.............................2
General Specifications
.................................2
GENERATOR..............................................11
IGNITION SYSTEM......................................12
INTAKE MANIFOLD
OIL PAN AND PUMP. . , . . . . . . . . . . . . . . . . . . . . . . . . .
OIL PUMP
P I S T O N , C O N N E C T I N G R O D A N D
CYLINDER BLOCK. . . . . . . . . . . . . . . . . . . . 45.
SPECIAL TOOLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
SPECIFICATIONS3
Sealants . . . . . . . . . . . . . . . . . . . . .7
Specifications.. . . . . . . . . . . . . . .3
Torque Specifications. . . . . . . . . . . . . . . . . .6
TIMINGBELT.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

ENGINE OVERHAUL General Information
GENERAL INFORMATION
GENERAL SPECIFICATIONS
DescriptionsS p e c i f i c a t i o n s
In-line DOHC
Number of cylinders
Cylinder bore mm (in.)
Piston stroke mm (in.)
Compression ratio
Valve timing Intake valve
[Measured at 0.5 mm
in.) lift]
Exhaust valve
Lubrication system
Water pump type
EGR type
Injector type and number
4
87.5 (3.445)
83.0 (3.267)
Opens (BTDC) 1.3”
Closes (ABDC) 39.7”
Opens (BBDC)
Closes (ATDC)1.1
Pressure feed, full-flow filtration,
Centrifugal impeller type
Single type
Electromagnetic, 4
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ENGINE OVERHAUL
SPECIFICATIONS
SERVICE SPECIFICATIONS,
Ignition coil system
Standard valueLimit
Spark plug cable
Ignition coil
Camshaft and cam follower
Cam wear amount mm (in.)
Camshaft bearing bore diameter mm (in.) Primary
Secondary
12000
0 . 0 2 5 40.254
Camshaft diameter bearing clearance mm (in.)
Camshaft end play mm (in.)
Camshaft bearing journal diameter mm (in.)
0.15
Camshaft lift mm (in.)
Hydraulic lash adjuster mm (in.)
head and valve
Intake
Exhaust
Body diameter
Plunger travel
minimum (dry)8.22.
7.00
2 2 . 9 4 9 - 2 2 . 9 6 2
4.24
of gasket surface mm (in.)
seat angle
seat (max) mm (in.)
seat width (Finish) mm (in.)
seat guide bore diameter mm (in.)
valve seat diameter mm (in.)
valve diameter mm (in.)
face angle
head diameter mm (in.) Intake
Exhaust
0.1
44.5” -45”
0.050
.
34.50 (1.358)
29.50 (1.161)
34.67-34.93
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ENGINE OVERHAUL . . . . .------- ----
ItemsStandard value
Valve margin mm (in.)
,
Exhaust
Valve length (Overall) mm (in.)Intake
Exhaust
(4.314-4.334)
Valve stem tip height mm (in.)
Intake48.04 (1.891)
Exhaust47.99 (1.889)
Valve stem diameter mm (in.)Intake5.934-5.952 ,
Exhaust
Valve stem to guide clearance mm (in.) Intake
Exhaust
guide inner diameter mm (in.)
spring free length mm (in.)
spring tension (valve closed) N/mm
0 . 0 7 6
0.101
46 (1.811)
spring tension (valve open) N/mm
spring number of coils mm (in.)
spring wire diameter mm (in.)
installed spring height mm (in.)
pump
pump clearance over rotors mm (in.)
pump cover out of flat mm (in.)
pump inner rotor thickness mm (in.)
pump outer rotor clearance mm (in.)
pump outer rotor diameter mm (in.)
pump outer rotor thickness mm (in.)
pump tip clearance between rotors mm (in.)
pressure at curb idle speed (psi)
7.35.
3.76
38.00 (1.496)
0.102
0 . 0 7 6
7.64
79.95 (3.148)
7.64
0.02
25 (4).
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