1990 MITSUBISHI SPYDER engine

ENGINE Cylinder Head
CYLINDER HEAD GASKET
REMOVAL AND INSTALLATION
Pre-removal Operationl Fuel Line Inner Pressure Release(Refer to GROUP On-vehiclel Engine Coolant Draining(Refer to GROUP 00 Maintenance Service.)l Engine Oil Draining(Refer to GROUP 00 Maintenance Service.)
3.62.9 Nm
2.2
4.9 Nm
220 1
Removal steps
1. Accelerator cable connection(Refer to GROUP 17 On-vehicleService.)2. Air hose 3. Idle air control motor connector
4. Knock sensor connector
5. Heated oxygen sensor connector
6. Engine coolant temperature gauge
unit connector
7. Engine coolant temperature sensor
connector8. Ignition power transistor connector
9. Throttle position sensor connector
10. Capacitor connector
11. Manifold differential pressure sensor connector
12. Injector connectors
13. Ignition coil connector Engine oil
,
21
14. position sensor connector
15. Crankshaft sensor
16. Air conditioning compressor
c o n n e c t o r
17. Control wiring harness
18. Center cover
19. Spark
cable
20. Brake booster
21. High-pressure fuel hose connection 22. Fuel return hose connection
23. By-pass valve hose connection
24. Water hose connection25. Vacuum hoses connection26.Breather hose 27. PCV hose connection
TSB Revision

ENGINE Head Gasket’.
engine>
78
Nm
(58
N m
Cylinder head
Sealant: ATD Part No. 8880 or equivalent
Revision
Specified sealant: MITSUBISHI GENUINE PART
or equivalent
36. Thermostat case assembly 37. O-ring38. Flange bolts and flangenut(Refer to GROUP
39. Cylinder head 40. Cylinder head assembly41. Ring42. (A) Cylinder head gasket
l Timing belt(Refer to 28. Power steering pump
29. Rocker cover
30. Semi-circular packing31. Heat protector (A)32. Water hose connection33. Water hose A connection 34. Radiator upper hose connection 35. Radiator lower hose connection

ENGINE Cylinder Head Gasket,
Intake sideFront of
engine
Exhaust side
REMOVAL SERVICE POINTS
UPPER HOSE/RADIATOR
HOSE
.Place mating marks on the radiator hose and the hos e clamp,
and then disconnect the radiator hose.
HEAD BOLT REMOVAL
Using the special tool, loosen the bolts in the ord er shown
in the illustration (in 2 or 3 stages), and then the
cylinder head assembly.
INSTALLATION SERVICE
CYLINDER HEAD GASKET INSTALLATION
(1) all oil and grease from the gasket mounting
(2) Install the gasket to the cylinder block with the identification
mark facing upwards.
HEAD BOLT INSTALLATION
(1) When installing the cylinder head-bolts, the le ngth below
the head of the bolts should be within the
If it is outside the limit, bolts.
(A): 99.4 mm (3.91 In.)
(2) Apply engine oil to the bolt thread and the was her..
TSB Revision

ENGINE H e a d
I n t a k e s i d eFront of
enaine
Exhaust side
Step 4
I
Painted marks
Step 5
Painted marks
Thermostat case assembly orwater pump
Water inlet pipe assembly
(3) bolts by the f o l l o w i n g
Step
Tighten to
78
(58
Remarks
In the in the
2 Loosen In order of that
3Tighten to
20 Nm (15
4Tighten of a turn.In the order-shown in-the
. illustration; Mark
of the cylinder head bolt
and cylinder head by
paint. ,
5
Tighten of a turn. shown in the
Check that the
painted
of
. lined
the
Caution
1.Always make a tightening If
than the head bolt will loosened.
2.If it is more than remove the head bolt repeat
the procedure 1. ,
the O-ring to the water inlet pipe,and coat the outer
inside diameter
the O-ring with water or coolant.
Caution
Do not let engine oil or other greases contact
O-ring.
TH E R M OSTAT CASE AS S E M B L Y
(1) Loosen the water inlet pipe bolt shown in
TSB Revision

ENGINE Cylinder Head Gasket
i n . )
Mating marks
(2) Apply specified sealant to the thermostat case
in the places shown in the illustration.
Specified
MITSUBISHI GENUINE PART equiva-
lent
(3) Apply a small amount of water to the O-ring water
inlet pipe, and then press the thermostat case
into the water inlet pipe.
(4) Tighten the thermostat case assembly mounting b olts.
(5) Tighten the water inlet pipe bolts.
RADIATOR LOWER HOSE/RADIATOR UPPER HOSE CONNECTION
(1) Insert each hose as far as the projection of th e water
outlet fitting or water inlet fitting.
(2) Align the mating marks on the radiator hose and hose
clamp, and then connect the radiator hose.
HIGH-PRESSURE FUEL CONNECTION
When connecting the fuel hose to the fuel rail,
apply a small amount of clean engine oil to the hos e union
and then insert, being careful not to damage the
Caution
Do not let engine oil get into the fuel rail.
TSB Revision

E N G I N E Timing Belt
TIMING BELT
REMOVAL AND INSTALLATION
l Engine Mount Bracket Removal(Refer to GROUP 32 Engine Mounting.)
Post-installation Operationl Under Cover Installation(Refer to GROUP 42 Under Cover.)l Engine Adjustmentl Engine Mount Bracket (Refer to GROUP 32 Engine Mounting.)
4817
6.86.52
25
Removal steps
l Drive Belt Tension Adjustment
1. Drive belt (Generator)
2. Drive belt (Power steering)
3. Tensioner pulley bracket4. Drive belt (A/C)
5. Water pump pulley
6. Water pump pulley (Power
steering)
7. Crankshaft pulley 8. Timing belt front upper cover 9. Timing belt front center cover 10. Timing belt front lower. cover l Timing belt tension adjustment 11. Timing belt12. Tension pulley 13. Auto tensioner
TSB Revision

ENGINE Timing
(22-44
A
tensioner
marks Cylinder headI surface
I I I
REMOVAL SERVICE POINTS
BELT FRONT CENTER COVER
Remove the stud bolt of the engine support bracket, and
remove the timing belt front center cover.
TIMING BELT REMOVAL
(1) Turn the crankshaft in the forward direction (t o the right)
to align the camshaft sprocket timing marks.
Caution
Always turn the crankshaft in the forward direction
only.
(2) Loosen the tension pulley center bolt.
(3) Move the tension pulley to the water pump side, and
then remove the timing belt.
Caution
If the timing belt is to be reused, use chalk to ma rk
(on its flat side) an arrow indicating the
direction.
INSTALLATION SERVICE
AUTO TENSIONER
(1) Apply 98-196 (22-44 force to the auto tensioner
by pressing it against a metal (cylinder
‘and
measure the movement of the push rod.
Standard value: Within 1 mm
in.)
A: Length when it is free (not pressed) B: Length when it is pressed
A-B: Movement
(2)If it is out of the standard value, replace the aut o tensioner.
TSB Revision

ENGINE Timing Belt
,Set pin
I
Timing marksCylinder had
Itop surface
Crankshaft
sprocket
60 mm
60 mm
(2.36 in.)
(2.36 in.)
or more
or more in.) in.)
(3) Use a press or vise to gently compress the auto tensioner
push rod until pin hole A of the push rod and pin hole
of the tensioner cylinder are aligned.
C a u t i o n If the compression speed is too fast, the rod may
become damaged, so be sure to carry out this opera-
tion slowly.
(4) Once the holes are aligned, insert the set pin.
NOTE
When replacing the auto tensioner a new part, the
pin will be in the auto tensioner.
(5) Install the auto tensioner to the engine.
TIMING BELT INSTALLATION’
(1) Align the timing marks on the camshaft sprocket , crank-
shaft sprocket and oil pump
(2) After aligning the timing mark on the oil pump sprocket,
remove the cylinder block plug and insert a Phillips screw-
driver with a diameter of 8 mm in.), and check to
be sure that the screwdriver goes in 60 mm (2.36 in .)
or more. If the screwdriver will only go in 20
25 mm
in.) before striking the counterbalance shaft,
turn the sprocket once, realign the timing mark and check
that the screwdriver goes in 60 mm (2.36 in.) or mo re.
Do not take out the screwdriver until thet i m i n g b e l t i s
installed.
TSB Revision