MITSUBISHI ECLIPSE 1991 Service Manual
Manufacturer: MITSUBISHI, Model Year: 1991, Model line: ECLIPSE, Model: MITSUBISHI ECLIPSE 1991Pages: 1216, PDF Size: 67.42 MB
Page 301 of 1216
ENGINE - Specifications
..--Items
Drive belt
For alternator
Deflectionmm (in.)
Inspection
New belt
Used belt
Tension
N (Ibs.)
Inspection
New belt
Used belt
For air conditioner compressor
Deflectionmm (in.)
Inspection
New belt
Used belt
Tension
N (Ibs.)
Inspection
New belt
Used belt
For power steering pump
Deflectionmm (in.)
Inspection
Timing belt
Amount;; I;;;j;ction of auto tensioner
rodTiming belt “B” tensionmm (in.)
Amount;: I;;;jytion of auto tensioner
rod(distance between the tensioner arm and
auto tensioner body)
Auto tensioner rod retraction
wmNOTE
O.D.: Outer Diameter
I.D.: Inner Diameter
0,s.: Oversize Diameter
U.S.: Undersize DiameterStandard Value
9.0- 11.5 (.354-.453)
7.5-9.0 (.295-.354)10
i.394)
250-500 (55-l 10)
500-700 (11 o-1 54)400 (88)
Approx. 8
(.315)
5.0-5.5 (.197-.217)
6.0-7.0 (.236-,276)
250-500 (55- 110)
470-570 (104-126)
320-400 (71-88)
6.0-9.0 (.236-,354)12
(.47)5-7
(.20-.28)3.8-4.5
(.15-,1812.5-3Limit
Page 302 of 1216
9-18ENGINE - Specifications
TORQUE SPECIFICATIONS
NO9CG-Items
Engine mount insulator nut (large)
(small)
Engine mount bracket nut or bolt
Transaxle mount insulator nut
Transaxle mount to body
Front roll stopper insulator nut
Front roll stopper bracket to centermember
Rear roll stopper insulator nut
Rear roll stopper bracket to centermember
Accelerator cable adjusting bolts
Fuel high pressure hose to delivery pipe
Ground cable to air intake manifold
Control wiring harness to air intake plenum
Power steering oil pump to bracket
Air conditioner to bracketcompressor
Exhaust pipe clamp bolt
Exhaust pipe to rubber hanger
Oil drain plug
panOil (bolts)
pan(nuts)VVater pulley
pump
Tensioner pulley bracket (air conditioner compressor)
Timing belt front coverCrankshaft sprocket
Camshaft sprocket
Timing belt “B” tensioner bolt
-eft engine support bracket3il switch
pressure3il unit
pressure gauge
Iii filter bracket
Iii cover
pumpqelief plug
‘lywheel or drive plate
ixhaust pipe bracket
support
‘rant roll stopper bracket
Iear roll stopper bracket‘rant engine bracket
support
:1.8L Engine>
Oil screen
Rocker cover
Camshaft bearing cap bolt (6 x 20)
(8 x 65)
Exhaust pipe to exhaust manifold
Intake manifold bolt
stay
Cylinder head bolt
Crankshaft pulley
Crankshaft damper pulleyNm
ftlbs.
60-8043-58
30-4022-29
50-6536-47
60-8043-58
40-5029-36
50-6536-47
40-5029-36
40-5029-36
40-5029-36
4-63-4
4-6
3-4
4-6
3-4
4-6
3-4
35-45
25-33
23-27
17-20
30-4022-29
10-157-l 135-45
25-33
6-84-6
5-73.5-5
8-106-7
23-27
17-20
10-127-9
110-13080-94
80-10058-72
15-2211-16
30-4222-308-126-9
8-126-9
15-2211-16
15-1811-13
40-5029-36
130-14094-101
30-4222-3055-75
40-54
110-13080-94
50-7036-51
18-2513-18
5-74-5
20-2714-2019-21
14-15
30-4022-29
18-2513-18
70-7551-5415-1811-13
15-1811-13
Page 303 of 1216
-
ENGINE - Specifications9-19Items
Oil sprocketpump
Silent shaft sprocket
Timing belt tensioner nut or bolt
Timing belt rear cover (upper)
(lower)
Oil drivenpump gear
Front case
Connecting rod bearing cap
Crankshaft bearingcap
<2.0L DOHC Engine>
Engine mount bracket to bracket nut or bolt
Engine cooler pipe to engine front case
Exhaust pipe to exhaust manifold (Turbo)
Oil return pipe to oil pan (Turbo)
Oil screen nut or bolt
Centermember installation bolt
Oil pipe to engine (Turbo)
Rocker cover
Center cover
Heat protector to exhaust manifold
Exhaust manifold to turbocharger(Turbo)
Intake manifold stay bolt
Cylinder head bolt
Crankshaft pulley
Oil sprocketpump
Silent shaft sprocket
Auto tensioner
Timing belt tensioner pulley
Timing belt idle pulley
Timing belt rear cover
Oil drivenpump gear
Front case
Engine oil cooler mounting nut
Eye bolt (Engine oil cooler side)
Engine oil hose mounting bolt
Engine oil feed hose assembly to Feed/Return tube assembly
Engine oil return hose assembly to Feed/Return tube assembly
Feed/Return tube assembly to oil filter bracket
Eye bolt (Oil filter bracket side)
Crankshaft angle sensor
Throttle body stayNm
ft.lbs.
34-4026-29
34-4025-29
22-3016-22
IO-127-9
12-159-11
34-4025-29
15-18
11-1332-3524-25
50-5537-39
17-26
12-19
40-4529-33
40-6029-43
8-106-7
15-2211-16
80-l 0058-72
14-19
10-142.5-3.52-3
2.5-3.52-3
12-15
9-l 155-65
40-47
25-3018-22
90-10065-72
20-3014-22
50-6036-43
43-49
31-35
20-2714-2043-55
31-4034-42
25-30
10-127-9
34-4025-29
20-2214-16
8-126-9
30-3522-25
3-52-4
40-5029-36
40-5029-36
3-52-4
40-4529-33
IO-137-9
15-2211-16SEALANTS AND ADHESIVES
NOSCE-.Items
Specified sealant
“. _
SemiWrcularMOPAR Part No.4318034Rocker cover
<2.0L
1(No.4318034No.1141~1
1 Oil pan1No.MD997110I
Page 304 of 1216
9-20ENGINE - Special Tools
SPECIAL TOOLS
M D998364Camshaft oil sealInstallation of camshaft oilseal
compressor
Removal and installation of oil pre
Page 305 of 1216
ENGINE - Special Tools9-21Removal of silent shaftrear bearing
<2.0L DOHC
installer(for engine
with silent shafts)
Crankshaft front
oilInstallation of crankshaft front oil seal
seal installerMD998376
Page 306 of 1216
ENGINE - Special ToolsPlug cap wrenchRemoval and installation of front case cap plug
<2.0L DOHC Engine>
Use with
MD998374
<2.0L DOHC Engine>
<2.0L DOHCEngine>
Removal andinstallationof valve andrelated
Page 307 of 1216
ENGINE - Troubleshooting9-23
--Symptom
Compression too lowProbable cause
Cylinder head gasket blown
Piston ring worn or damage
Piston or cylinder wornRemedy
Replace gasket
Replace rings
Repair or replace piston and/or cylinder
block
Valve seat worn or damageRepair or replace valve and/or seat ring
Oil pressure dropEngine oil level too lowCheck engine oil level
Oil pressure switch faultyReplace oil pressure switch
Oil filter cloggedInstall new filter
Oil pump gears or cover wornReplace gears and/or cover
Thin or diluted engine oilChange engine oil to correct viscosity
Oil relief valve stuck (opened)Repair relief valve
Excessive bearing clearanceReplace bearings
Oil pressure too highOil relief valve stuck (closed)Repair relief valve
Noisy valvesIncorrect lash adjusterBleed air or replace lash adjuster
Thin or diluted engine oil (low oil pressure)Change engine oil
Valve stem or valve guide worn or damageReplace valve and/or guide
Connecting rod noise/Insufficient oil supplyCheck engine oil level
main bearing noise
Low oil pressureRefer to “Oil pressure drop”
Thin or diluted engine oilChange engine oil
Excessive bearing clearanceReplace bearings
Timing belt noiseIncorrect belt tensionAdjust belt tension
Excessive engine rollingLoose engine roll stopper (Front, Rear)Retighten
and vibration
Loose transaxle mount bracket
Loose engine mount bracket
Loose center member
Broken transaxle mount insulatorReplace
Broken engine mount insulator
Broken engine roll stopper insulator
Page 308 of 1216
9-24ENGINE - Service Adjustment Procedures
ENGINE 4.8L Engine>
SERVICE ADJUSTMENT PROCEDURES -
CHECKING COMPRESSION PRESSURENOSFFAI
(1) Before checking compression, ensure that engine oil, the
starter motor, and battery are all in good condition.
(2) Start the engine and wait until engine coolant temperature
has risen to
85-95°C (185-205°F).
(3) Stop the engine and pull the spark plug cables.
(4) Remove the spark plugs.
(5) Crank the engine to remove any foreign objects in the
cylinders.Caution
Cover the spark plug holes with shop towel, etc., in
order to keep expelled foreign objects from flying out,
and keep away from the holes. When measuring
compression with water, oil, or fuel having entered the
cylinder through a crack, etc., these will come flying
out of the spark plug hole hot and fast, so be sure to
take the proper precautions.
(6) Set the compression gauge to the spark plug hole.
(7) Holding the throttle valve full open, crank the engine and
measure compression.
Limit: Min. 920
kPa (130 psi) [250-400 rpm]
(8) Perform 6 and 7 above for all the cylinders, ensuring that
compression pressure differential for each of the cylinders
/Iis within the specified limit.
__Differential limit: Max. 100
kPa (14 psi)
(9) If a cylinder’s compression or pressure differential exceeds
the limit, add a small amount of oil through the spark plug
hole and repeat steps (6)-(8).
0If the addition of oil brings compression up, it is possiblethat there is poor contact between the piston ring and
cylinder wall.
@ If not compression does not come up, valve seizure,
poor valve seating, or a compression leak from the
gasket are all possible.
/y
-
Page 309 of 1216
ENGINE <1.8L Engine>- Service Adjustment Procedures9-25
MANIFOLD VACUUM INSPECTION(1) Before inspection and adjustment, put the vehicle
in=following state.
l Engine coolant temperature:
85-95°C (185-205°F)
l Lights, electric, cooling fan, and accessories: OFF
lTransaxle: Neutral
(N or P for vehicles with an automa-
tic transaxle)
l Steering wheel: Neutral position
(2) Check that the idling revolution speed is normal.
(3) Remove the PCV hose from the PCV valve and attach a
vacuum gauge.
(4) Check that the negative pressure at the intake manifold
during idle revolution is normal.
Standard value: 510 mmHg (20
in.Hg)(5) If outside the standard value, isolate the cause by referring
to the following table and repair the fault.
SymptomCauseRemedy
l The vacuum gauge reading is less thanl Ignition timing is retarded.l Adjust the ignition timing.
standard value, but the pointer is
-stable.
l The vacuum gauge pointer swingsl Air mixture concentration too
slowly.rich.
l Check ECI-MULTI system.l The vacuum gauge pointer drops irre-
gularly.
l The vacuum gauge pointer drops inter-
mittently to 30 to
160 mmHg (1.2 to
6.3 in.Hg).l The vacuum gauge pointer drops sud-
denly from the normal reading to 250rronnrt$,(9.8 rn.Hg), then returns tol Air mixture concentration too
lean.
l Check ECI-MULTI system.0 Incomplete close contact of in-
take exhaust valve seat.l Check and repair the valve.
l Broken cylinder head gasketl Replace cylinder head gasket.
Page 310 of 1216
9-26ENGINE <1.8L Engine> -Service Adjustment Procedures
TIMING BELT TENSION ADJUSTMENTNOSFGBCThere are two access holes provided in the timing belt front
lower cover. The two access holes can be used to readjust thetension of the timing belt, by following the procedures
described below, without the necessity of removing the timing
belt front lower cover. Note, however, that timing belt “B”,
which drives the right silent shaft, cannot be adjusted unless
the cover is removed.
(1) Turn the steering wheel all the way to the left.
(2) Remove the left side undercover panel.
NOTEThis work is done so that the crankshaft can be turned.
(3) Place a piece of wood against the engine oil pan and jack
(4)
:tmove the engine mounting bracket.
(5) Remove the timging belt front upper cover.
(6) Remove the four spark plugs.
(7) Turn the crankshaft clockwise and check the timing belt
condition.
OlAOOBlTiming mark
(on upper under cover)
Timing mark
(on camshaft sprocket)
OlR0153cover
‘I!i
OlA0082
01 A0083(8) Turn the crankshaft clockwise and align the timing marks.
(9) Remove the air conditioner drive belt and the alternator
drive belt.
(10)Remove the access cover (two places). There are easily
removed by inserting a screwdriver into the slots indicated
by the raised arrows in the timing belt cover and twisting.
(1l)lnser-t a socket wrench [a 14 mm (.55 in.) box wrench]
through the hole in the access cover and loosen the timing
belt tension bolt and nut.
Caution
The timing belt tension bolt and nut need only be
loosened
180”-200”. Any further loosening might re-
sult in their falling off inside the timing belt cover.