engine MITSUBISHI SPYDER 1990 Service Repair Manual

E N G I N E T o o l s
ToolTool numberSupersession
and name
0991453
453
Engine hanger
assembly the engine assembly
removal and of the ,..
seal installation
Oil seal pilot installer
6995059
6926-2
Crankshaft oil
seal installer
R e v i s i o n

ENGINE Troubleshooting,
TROUBLESHOOTING
Symptom Probable causeRemedy
Compression too low Cylinder head gasket blown Replace gasket
Piston ring worn or damaged Replace rings
Piston or cylinder worn Repair or replace piston
cylinder
block
Valve seat worn or damaged Repair or replace valve seat ring
Oil pressure drop Engine oil level too low Check engi ne oil level
Oil pressure switch faulty Replace oil pressure switch
Oil filter clogged
Install new filter
Oil pump gears or cover
Replace gears and/or cover
Thin or diluted engine oil Change engine correct
Oil relief valve stuck (open) Repair relief valve
Excessive bearing clearance Replace bearings
pressure too highOil relief valve stuck (closed) Repair relief valve
valves Incorrect lash adjuster Bleed air or replace lash adjuster
Thin or diluted engine oil (low oil pressure) Change engine oil
Valve stem or valve guide worn or damaged Replace va lve
guide
rod noise/lnsuff oil supplyCheck engine oil level
nain bearing noise Low oil pressure Refer
pressure drop”
Thin or diluted engine oil Change engine oil
Excessive bearing clearance Replace bearings
belt noiseIncorrect belt tension
Adjust belt tension replace-timing
belt
engine rolling Loose engine roll stopper (Front, Re
ar)Retighten
vibration
Loose transaxle mount bracket Retighten
Loose engine mount bracket Retighten
Loose center member Retighten
Broken transaxle mount insulator
Replace
Broken engine mount insulatorReplace
Broken roll stopper insulatorReplace
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ENGINE On-vehicle
Power
Powersteering oilpump pulleyTension
pulley
POWER STEERING OIL PUMP DRIVE BELT
CHECK Use the belt tension gauge to check belt tension at the shown
point or check deflection by applying 98 (22 to the
shown point.
Standard value:
Tension: 400
(90 110
Deflection: 11 14.0 mm in.)
POWER STEERING OIL PUMP DRIVE BELT TENSION
ADJUSTMENT 1. Loosen power steering oil pump fixing bolt (A, C).
2. Move power steering oil pump, tension belt moder ately
and adjust tension.
Standard value:
When a new belt is when a used belt is
installedinstalled
Tension489-712
I
Deflection6.5-9.5
mm (in.)I
Tighten the fixing bolt (A).
Tightening torque: 39 Nm (29
4. Tighten the remaining fixing bolts and C).
Tightening torque: 39 Nm (29
5.Check the belt deflection mount and readjust if nec essary.
Caution
Turn the crankshaft one full rotation or more clock wise
before this check.
POWER STEERING OIL PUMP AND A/C COMPRESSOR
DRIVE BELT TENSION CHECK
Use the belt tension gauge to check belt tension at the shown
point or check deflection by applying 98
(22 Ibs.) to the
point.
Standard value:
Tension: 412 510 (92.6 114.6 Ibs.)
Deflection: 10.0
11.0 mm in.)
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ENGINE On-vehicle Service
POWER STEERING OIL PUMP AND A/C
DRIVE BELT TENSION ADJUSTMENTTensionpulley nut1. Loosen the tension pulley nut.
Tension pulley2.. Adjust the belt deflection amount using the adj usting bolt.
Standard value:
Adjusting boltItems
Tension
(Ibs.)
Deflection
mm (in.) When a new belt is When a used belt is
installed
installed(136.7-158.7).( 9 2 . 6 - 1 1 4 . 6 )
3. Tighten the tension pulley nut.
Caution
Fix the power steering oil pump position
to the vehicle front.
IGNITION TIMING CHECK11100170044
It is not necessary to check ignition timing using a timing
light, because the crankshaft position is detected directly and
ignition timing is controlled electronically.
CURB IDLE SPEED CHECK
1. Before inspection and adjustment set vehicles in the
following condition.
lEngine coolant temperature:
lLight, electric cooling fan and all accessories: OF F
l Transaxle: Neutral (P range on vehicles with
2. Connect the scan tool to the data link connector .
3. Start the engine and run it at idle.
4. Run the engine at idle for 2 minutes.
5. Check the curb idle speed.
Standard value: 800
100
NOTE
The idle speed is controlled automatically by the i dle air
c o n t r o l s y s t e m . If the idle speed is outside the standard value, in spect
the
components by referring to GROUP
Troubleshooting.
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ENGINE On-vehicle Service
IDLE MIXTURE CHECK
11100210081
1.Before inspection, set vehicles in the following co ndition:
lEngine coolant temperature:
l Lights, electric cooling fan and all accessories: O FF
lTransaxle: Neutral (P range on vehicles with
2.After turning the ignition switch to OFF, connect t he scan
tool to the data link connector.
3.Start the engine and run it at 2,500 for 2 minutes.
4. Set the CO, HC tester.
5. Check the CO contents and the HC contents at idl e.
Standard value:
CO contents: 0.5% or less
HC contents: 100 ppm or less
6. If the idle speed is outside the standard value, check
the following items: l Diagnostic output
l Closed-loop control (When the closed-loop control
is carried out normally, the output signal of the h eated
oxygen sensor repeats between and
,000 at idle.)
l Fuel pressure
I n j e c t o r
lIgnition coil, spark plug cable, spark plug
lEGR system and the EGR valve leak
l Evaporative emission control system
Compression pressure
NOTE
Replace the three-way catalyst whenever the CO and
HC contents do not remain inside the standard value .
(even though the result of the inspection is normal on
all items.)
COMPRESSION PRESSURE CHECK
1.Before inspection, check that the engine oil, start er and
battery are normal. Also, set the vehicle to the fo llowing
condition:
lEngine coolant temperature:
lLights, electric cooling fan and all accessories: O FF
lTransaxle: Neutral (P range on vehicle with
2. Disconnect the spark plug cables.
3. Remove all spark plugs.
4.Disconnect the relay (ASD relay) connector to prevent
a spark.
4 4
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E N G I N E On-vehicle Service’
5. 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 crank-
ing.
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.
6.Set compression gauge to one of the spark plug hole s.
7. Crank the engine with the throttle valve fully o pen and
measure the compression pressure.
Standard value (at engine speed of
p s i )
Limit (at engine speed of
min. 689 (100 psi)
8.Measure the compression pressure for all the cylind ers,
and check that the pressure differences of the cylinders
are below the limit.
Limit:
NOTE
The limit value can be derived by calculating the d ifference
between the maximum and minimum values for the
compression pressure and dividing this value by the
maximum value.
9.If there is a cylinder with compression or a compre ssion
difference that is outside the limit, pour a small amount
of engine oil through the spark plug hole, and repeat
the operations in steps 7 and 8. (1) If the compression increases after oil is added , the
cause of the malfunction is a worn or damaged pisto n
ring and/or cylinder inner surface.
(2) If the compression does not rise after oil is a dded,
the cause is a burnt or defective valve seat, or pr essure
is leaking from the gasket.
10. Connect the
relay (ASD relay) connector.
11. Install the spark plug and spark plug cable.
12. Use the scan tool to erase the diagnostic troub le codes.
NOTE
This will erase the diagnostic trouble code resulti ng
the relay (ASD relay) being disconnected.
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ENGINE On-vehicle.’
M A N I F O L D V A C U U M
1.Before inspection, set vehicles. in the condition:
Engine coolant
lLights, electric cooling and
lTransaxle: Neutral (P
2. Connect the scan tool to the data link connector.
,
3. Attach a three-way joint to the vacuum
the fuel pressure regulator and the intake manifold, and
connect a vacuum gauge.
4.Start the engine and check that idle speed is withi n specifi-
cation.
Standard value: 800 100
5. Check the manifold vacuum.
Limit: min. 60
(18
LASH CHECK
A tappet-like may be produced from several items.
Check the following items. 1. Engine oil level too high or too low.
This may cause, aerated oil to enter, the adjusters and
cause them to be spongy.
2.Insufficient running time after rebuilding the cyli nder head.
Low speed running up to 1 hour may be required.
3. Low oil pressure.
4. The oil restrictor pressed in to the vertical oi l passage
to the cylinder head is plugged with debris.
5.Air ingested in to oil due to broken or cracked oil pump
pick up.
6. Worn valve guide.
7. Faulty hydraulic lash adjuster. (1) Check for sponginess while still installed in e ngine.
Depress part of the cam follower just over the adju ster.
Normal adjusters should be free and very firm.
Spongy adjusters can be depressed to the bottomed
position easily.
(2) Remove a suspected hydraulic lash adjuster asse m-
bly.
(3) Clean out dirt and varnish with solvent.
(4) Reassemble with engine oil.
(5) Check for sponginess.
(6) If still spongy, replace
new adjuster
assembly. .
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ENGINE Engine
ENGINE ASSEMBLY
REMOVAL AND INSTALLATION
Pm-removal Operationl Fuel Line Pressure Releasing(Refer to GROUP On-vehicle Service.)l Hood Removall Engine Coolant Draining
(Refer to GROUP 00 Maintenance Service.)l Transaxle Assembly Removal Refer to GROUP Transaxle Assembly.) Refer to GROUP Transaxle Assembly.)lRadiator Removal (Refer to GROUP 14 Radiator.)l Under Cover Removal(Refer to GROUP 42 Under Cover.)
39 Nm29
39 Nm29
Post-installation Operationl Radiator Installation (Refer to GROUP 14 Radiator.)l Transaxle Assembly Installation Refer to GROUP Transaxle Assembly.) Refer to GROUP Assembly.)l Engine Coolant Supplying
(Refer to GROUP 00 Maintenance Service.)l Hood Installationl Accelerator Cable Adjustment(Refer to GROUP 17 On-vehicle l Under Cover Installation
(Refer to GROUP 42 Under-Cover.)l Drive Belt Tension Adjustment 9
Removal steps
1. compressor connector
2. Power steering pressure switch
connector3. Heated oxygen sensor connector
4. Engine coolant temperature gauge
unit connector
6. MAP sensor connector
7. Intake air temperature sensor
connector8. Power steering pump connection
9. A/C compressor connection
5. Engine coolant temperature sensor
connector
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ENGINE
Fuelrail
Engine oil
2.5 Nm
10. Accelerator cable connection11. Throttle position sensor connector
12. control motor connector
13. speed sensor connector
14. injector harness connector
15. Generator harness connector16. Ignition coil connector
17. Camshaft position sensor connector 18. EGR solenoid valve connector
19. Generator connector20. Crankshaft position sensor
connector21. Knock sensor connector
22. Oil pressure switch connector
23. Heater hose connection 24. High-pressure fuel hose connection
25. Purge air hose connection
Brake booster hose
connection
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E N G I N E ,
66 Nm 64
Nm72-67
27. Vapor hose connection
28. Front exhaust pipe connection
29. Gasket
30. Engine mount bracket assembly 31. Engine assembly
REMOVAL SERVICE POINTS
POWER STEERING
Remove the power pump from the bracket with the
hose attached.
NOTE
Place the removed power. steering pump in where
it will not be a hindrance when’ installing the
engine assembly, and ‘tie it with
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