1990 MITSUBISHI SPYDER light

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 OVERHAUL
FORM-IN-PLACE GASKETS
There are numerous places where form-in-place gaskets are used on the engine. Care must be
when applying form-in-place gaskets to assure obtaining the desired results. size, continuity, ‘and
location are of great importance. Too thin a bead can result in leakage
too much can result’ in
spill-over which can break off and obstruct fluid f eed lines.
A continuous bead of the proper width
essential to obtain a leak-free joint.
GASKET DISASSEMBLY
Parts assembled with form-in-place gaskets may be d isassembled without unusual effort’
it may be necessary to lightly tap the part with a mallet or other suitable tool to break the seal between
the mating surfaces.A flat gasket scraper may also be lightly tapped in to the joint but care be
taken not to damage the mating surfaces.
SURFACE PREPARATION
Scrape clean or wire brush all gasketsurfaces removing all loose material. Inspect
assure gasket rails are flat.
Flatten rails with a hammer on a flat plate if
must be free of oil and dirt. Make sure old gasket material is removed from blind
FORM-IN-PLACE GASKET APPLICATION
Assembling parts using a form-in-place gasket requires care but it’s easier than using precut gaskets.
Gasket material should be applied sparingly 1 mm
inch.) diameter or less to one
surface, Be certain the material surrounds each mou nting hole.
Excess material can easily be
‘off. Components should be torqued in place within 15 minutes. The use of a locating dowel is recommen ded
during assembly, to prevent smearing the material off location.
Loctite 18718 gasket material or equivalent should be applied in a continuous bead
3
mm
inch.) in diameter. All mounting holes must be circled.
For corner sealing, 3.17 or 6.35
mm
or inch.) drop is placed in the center of the gasket contact area. Uncured may
be removed with a shop towels. Components should be torqued in place while the sea lant
wet
to the touch (within 10 minutes). The usage of a locating dowel is recommended during assembly to
prevent smearing of material off location.
MOPAR TORQUE CURE GASKET MAKER
Mopar torque cure gasket maker is a unique anaerobi c type gasket material to be used ONLY
the and engine block. The material cures in the absenc e of air when. two
metallic surfaces. It will not cure if left in the uncovered tube. This anaerobic material
specially made
to seal the area between the
and cylinder block without disturbing the bearing’ or
alignment of these components.. .
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11 ENGINE OVERHAUL Cooling System
(1) Install switch.
(2) Install engine coolant
lighten sensor
to 7 Nm (5
torque.
Overflownipple
Pressure cap
Impeller
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O-ring
(3) Place a new gasket (dipped in clean water) on water
box surface, center thermostat in water
gasket.
Place housing over gasket and thermostat; making su re
thermostat is in the thermostat housing. Bolt housing
to water box. Tighten bolts to 22 Nm
(4) Install O-ring.
(5) Install water pipe.
(6) Install water hose.
( 7 ) I n s t a l l e x h a u s t m a n i f o l d c o v e r :
(8) Install oil level gauge.
(9) Install new O-ring gasket in water pump body O- ring
groove.
Caution
Make sure O-ring is properly seated in water pump
groove before tightening screws. An improperly
located O-ring may cause damage to the O-ring and
cause a coolant leak.
pump body to block and tighten screws to 12
Nm (9
(ll)Rotate pump by hand to check for freedom of mov ement.
INSPECTION
Replace water pump body assembly if it has any of these
defects:
(1) Cracks or damage on the body.
(2) Coolant leaks from the shaft seal, evident by c oolant
traces on the pump body.
(3) Loose or rough turning bearing.
(4) Impeller rubs either the pump body or the engine bl ock.
(5) Impeller loose or damaged.
(6) Sprocket or sprocket flange loose or damaged.

ENGINE, OVERHAUL Fuel and Emission Control,,
INSTALLATION
(1) Apply a light coating of clean engine,, oil to the upper
O-ring.
(2) Install injector in cup on fuel
(3) Install retaining clip.
(4) Apply a light coating of clean engine oil to ‘the -O-ring
on the nozzle end of each
Insert fuel injector nozzle into openings in manifold.
Seat the injectors in place. rail
screws.
(6) Connect fuel supply tube to fuel rail.
(7) Install throttle body and new gasket on intake manifold.
T i g h t e n m o u n t i n g b o l t s .
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Connect purge hose nipple on throttle body.
Loosely install EGR valve with a gasket. Install
new gasket between EGR tube and
(lO)Finger tighten EGR tube fasteners.
(ll)Tighten EGR valve mounting screws to 22
(16
EGR tube fasteners to 11 torque.
vacuum supply tube to solenoid.;

(Overall)
Intake 111.49-111.99 mm (4.389-4.499 in.) Exhaust
mm in.)
Stem Diameter
Intake 5.934-5.952 mm in.)
Exhaust
mm in.)
Valve Margin
Intake 1.285-1.615 mm in.)
Exhaust
mm in.)
(3) When refacing valve seats, it is important that the correct
size valve guide pilot be used for reseating A
true and complete surface must
Measure the concentricity of valve seat using a va lve
seat dial indicator. Circular
should not exceed.
Limit:
0.05 mm in.) Indicator reading.
(5) Inspect the valve seat with Prussian blue to de termine
where the valve contacts the seat.
To do this, coat valve face LIGHTLY with Prussian b lue
then set valve in place. Rotate the valve with light pressure.
If the blue is transferred to the center of valve f ace, contact
is satisfactory. If the blue is transferred to top edge of
the valve face, lower valve seat with a 15degree stone.
If the blue is transferred to the bottom edge of va lve
face raise valve seat with a 65 degree stone.
Intake valve seat diameter 34.50 mm (1.358 in.)
Exhaust valve seat diameter 29.50 mm (1.161 in.)
Valve seats which are worn or burned can be reworke d
if correct angle and seat width are maintained. Otherwise,
cylinder head must be replaced.
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On-vehicle Service
A/C COMPRESSOR DRIVE BELT TENSION ADJUSTMENT
1. Loosen tension pulley fixing nut A.
2. Adjust belt tension with adjusting bolt B.
Standard value:
When a new belt isWhen a used belt is
installed installed
Tension
382-411255-333
(Ibs.)
Deflection8.5-7.5
mm (in.)
3. Tighten fixing nut A. Tightening torque: 23-26 Nm
4.Check the belt deflection amount and readjust if ne ces-
sary.
Caution
This check should be carried out after turning the
crankshaft one full rotation or more
the forward
direction (to the right).
IGNITION TIMING CHECK
1.Before inspection and adjustment set vehicle in the follow-
ing condition.
lEngine coolant temperature:
lLights, electric cooling fan and all accessories: OFF
Transaxle: Neutral (P range on vehicles with
2. Turn the ignition switch to OFF and connect the scan
tool to the data link connector.
3. Set up a timing light.
4. Start the engine and run at idle.
5. Select No. 22 of the SCAN TOOL DATA LIST.
6.Check that engine idle speed is within the standard value.
Standard value: 750 100
7. Select No. 17 of the SCAN TOOL ACTUATOR TEST.
Check that basic ignition timing is within the standard
value.
Standard value: BTDC
If the basic ignition timing is outside the standar d value,
inspect the components by referring to GROUP
Troubleshooting.
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ENGINE O n - v e h i c l e
Press the scan tool clear key (select aforced driving
cancel mode) to release the ACTUATOR TEST
NOTE
If the test is not a forced driving will continue
for 27 minutes. Driving under this condition may damage
the engine.
Check that the actual ignition timing is at the st andard
value.
Standard value: Approx. BTDC
NOTE
Ignition timing is variable within about even under
normal operating.
2. And it is automatically further advanced by abou t
from BTDC at higher altitudes.
CURB IDLE SPEED CHECK
Before inspection and adjustment, set vehicles in the
following condition.
lEngine coolant temperature:
lLights, electric cooling fan and all accessories: OFF
lTransaxle: Neutral (P range on vehicles with A/T)
2. Turn the ignition switch to OFF and connect the scan
tool to the data link connector.
3. Select No. 17 of the SCAN TOOL ACTUATOR TEST
4. Check the basic ignition timing.
Standard value: BTDC
5. Run the engine at idle for 2 minutes.
6. Select No. 22 of the SCAN TOOL DATA LIST.
7. Check the curb idle speed.
Standard value: 750 100
NOTE
The idle speed is controlled automatically by the i dle air
control system.
8. If the idle speed is outside the standard value, check
the components by referring to GROUP Trou-
bleshooting.
IDLE MIXTURE CHECK
Before inspection, set vehicles in the following co ndition:
lEngine coolant temperature:
lLights, electric cooling fan and all accessories: O FF
lTransaxle: Neutral (P range on vehicles with
2. Turn the ignition switch to OFF and connect the scan
tool to the data link connector.
3. Select No. 17 of the SCAN TOOL ACTUATOR TEST.
4.Check that the basic ignition timing is within the standard
value..
Standard value:
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On-vehicle
Run the engine.
8. Set CO, HC tester.
7. Check the CO contents and the HC contents at idle.
Standard value:
CO contents: 0.5% or less
HC contents: 100 ppm or less
8. the standard value is exceeded, 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 heated
oxygen sensor and
at idle.)
l
Injector
lIgnition coil, spark plug
l system the
l Evaporative emission
Compression ,
NOTE,
Replace the three-way CO and
HC contents do not
the value.
(even though the
of the” on
all items.)
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 vehicles with
2. Disconnect the spark plug cables.
3. Remove all of the spark plugs.
4. Disconnect the crankshaft position sensor
NOTE
Doing this will prevent the engine control unit fro m carrying
out ignition and fuel injection.
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