1990 MITSUBISHI SPYDER cooling

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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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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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 Specifications
Items
Connecting rod bearing oil clearance mm (in.)Standard value
Limit
Connecting rod piston pin bore diameter mm (in.)
Connecting rod large end bore diameter mm (in.)
Connecting rod side clearance mm (in.)
Main bearing journal diameter mm (in.)0.37
.
Main bearing journal out-of-round mm (in.)
Main bearing journal taper mm (in.)
Crankshaft
0.0035.
0.0038
Crankshaft connecting rod journal diameter mm (in.)
Crankshaft out-of-round mm (in.)
Crankshaft tape mm (in.)
Crankshaft main bearing diameter clearance mm (in.)0.0035
0.0038
.
Crankshaft end play mm (in.)
TORQUE SPECIFICATIONS
Items
Generator
Pivot
Lock nut61
Ignition system
Spark plug28 20
Camshaft position sensor3
Timing belt
Crankshaft damper bolt62 45
Engine mount bracket4130
Timing belt inspection cover
Tensioner pulley28 20
Timing belt tensioner3122
Tensioner arm bracket3122
Camshaft sprocket10173
Rear timing belt cover 9.6
Cooling system components
Water pump
Thermostat housing2216
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ENGINE OVERHAUL Cooling System
COOLING SYSTEM COMPONENTS
REMOVAL
(1) Remove water pump attaching screws to engine.
Thermostat
Thermostat Gasket
(2) Remove level gauge.
(3) Remove exhaust manifold cover.
(4) Remove water hose.
(5) Remove water pipe.
(6) Remove O-ring.
(7) Remove thermostat housing bolts and housing.
(8)Remove thermostat, discard gasket and clean both ga sket
sealing surfaces.
(9) Remove engine coolant temperature sensor.
Remove switch.
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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.

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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