compression ratio MITSUBISHI MONTERO 1998 Service Manual
[x] Cancel search | Manufacturer: MITSUBISHI, Model Year: 1998, Model line: MONTERO, Model: MITSUBISHI MONTERO 1998Pages: 1501, PDF Size: 25.81 MB
Page 16 of 1501
![MITSUBISHI MONTERO 1998 Service Manual Stroke ........................................... 3.3779" (85.8 mm)\
Compression Ratio ............................................ 9.0:1
Fuel System ...........................................](/img/19/57333/w960_57333-15.png "MITSUBISHI MONTERO 1998 Service Manual Stroke ........................................... 3.3779\" (85.8 mm)\
Compression Ratio ............................................ 9.0:1
Fuel System ...........................................")
Stroke ........................................... 3.3779" (85.8 mm)\
Compression Ratio ............................................ 9.0:1
Fuel System .................................................... MFI
Horsepower @ RPM ........................................ 200 @ 5000
Torque Ft. Lbs. @ RPM ................................... 228 @ 3500
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ROCKER ARMS & CAMSHAFT
ROCKER ARMS & CAMSHAFT\
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Application In. (mm)\
Camshaft Lobe Height
Montero
Intake
Standard ..................................... 1.4846 (37.710)\
Limit ........................................ 1.4650 (37.210)\
Exhaust
Standard ..................................... 1.4622 (37.140)\
Limit ........................................ 1.4425 (36.640)\
Diamante
Intake
Standard ..................................... 1.4795 (37.580)\
Limit ........................................ 1.4598 (37.080)\
Exhaust
Standard ..................................... 1.4547 (36.950)\
Limit ........................................ 1.4350 (36.450)\
Camshaft Journal Diameter .......................... 1.7689 (44.930)\
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CYLINDER HEAD & VALVES
CYLINDER HEAD & VALVES\
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Application Specification
Head Warpage
Standard ........................................ .0012" (.030 mm)\
Limit ........................................... .0079" (.200 mm)\
Maximum Resurface ................................. .0079" (.200 mm)\
Overall Height ................................ 4.7244" (120.000 mm)\
Valve Margin
Intake
Standard ..................................... .0394" (1.000 mm)\
Limit ......................................... .0197" (.500 mm)\
Exhaust
Standard ..................................... .0472" (1.200 mm)\
Limit ......................................... .0276" (.700 mm)\
Valve Height (Montero)
Intake
Standard .................................. 4.4213" (112.300 mm)\
Limit ..................................... 4.4016" (111.800 mm)\
Exhaust
Standard .................................. 4.4924" (114.110 mm)\
Limit ..................................... 4.4728" (113.610 mm)\
Stem Diameter
Intake ......................................... .2362" (6.000 mm)\
Exhaust ........................................ .2362" (6.000 mm)\
Stem to Guide Clearance
Intake
Standard ........................... .0008-.0020" (.020-.050 mm)\
Limit ......................................... .0039" (.100 mm)\
Page 67 of 1501
(such as compression
fitting) ............... B ............ Require replacement.
Flange leaking .......... A .. Require repair or replacement.
Leaking ................. A .. Require repair or replacement.
Restricted internally ... A .. Require repair or replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
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EXPANSION VALVES
EXPANSION VALVE INSPECTION \
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Condition Code Procedure
Application incorrect ... B ............ Require replacement.
Attaching hardware
broken ................. A ... Require repair or replacement
of hardware.
Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Corroded internally ..... 1 ............ Suggest replacement.
Filter screen torn ...... A .. Require replacement of screen.
Inoperative ............. A ........... ( 1) Require repair or
replacement.
Leaking ................. A ............ Require replacement.
Restricted .............. A .. Require repair or replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped (threads
missing) ............... A ............ Require replacement.
( 1) - Expansion valve operation may be affected by capillary
tube location, corrosion, and insulation tape.
Inoperative includes intermittent operation.
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FUNCTION SELECTORS
See CONTROL HEADS (FUNCTION SELECTORS) .
FUSES, FUSIBLE LINKS AND CIRCUIT BREAKERS
FUSE, FUSIBLE LINK AND CIRCUIT BREAKER INSPECTION \
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Condition Code Procedure
Application incorrect ... B ............ Require replacement.
Blown ................... A ........ ( 1) Require replacement.
Corroded, affecting
performance ............ A .. Require repair or replacement.
Corroded, not affecting
performance ............ 2 .. Suggest repair or replacement.
Cracked, affecting
performance ............ A .. Require repair or replacement.
Cracked, not affecting
performance ............ 1 .. Suggest repair or replacement.
Inoperative ............. A ... ( 2) Require replacement.
Insulation damaged,
Page 209 of 1501
specifications.
Wire lead open .......... A .. Require repair or replacement.
Wire lead shorted ....... A .. Require repair or replacement.
(1) - If a sensor is not adjustable, further inspection is
required to identify and correct cause.
( 2) - Determine cause and correct prior to repair or
replacement of part.
( 3) - Determine source of contamination, such as metal
particles or water. Require repair or replacement.
( 4) - Inoperative includes intermittent operation or out of OEM
specification. Some components may be serviceable; check
for accepted cleaning procedure.
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STEEL BRAKE LINES
STEEL BRAKE LINE INSPECTION \
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Condition Code Procedure
Attaching hardware
broken ................. A ... Require repair or replacement
of hardware.
Attaching hardware
missing ................ C .......... Require replacement of
hardware.
Attaching hardware not
functioning ............ A ... Require repair or replacement
of hardware.
Corroded, affecting
structural integrity ... A ............ Require replacement.
Fitting incorrect (for
example, compression
fitting) ............... B ............ Require replacement.
Flare type incorrect .... B .. Require repair or replacement.
Leaking ................. A .. Require repair or replacement.
Line material incorrect
(copper, etc.) ......... B ............ Require replacement.
Restricted .............. A ............ Require replacement.
Routed incorrectly ...... B ..... Require routing correction.
Rust-pitted ............. 1 ............ Suggest replacement.
Threads damaged ......... A .. Require repair or replacement.
Threads stripped
(threads missing) ...... A ............ Require replacement.
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STOPLIGHT SWITCHES
See BRAKE STOPLIGHT SWITCHES .
SWITCHES
NOTE: Copied from Electrical UIGs & added "float saturated" from
old fluid level sensor switches.
STEEL BRAKE LINE INSPECTION
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Condition Code Procedure
Attaching hardware
broken ................. A ... Require repair or replacement
of hardware.
Page 251 of 1501
![MITSUBISHI MONTERO 1998 Service Manual Generator ........ .30-.41 (7.5-10.5) ..... .35-.47 (9.0-12.0\
)
P/S (W/O A/C) .... .26-.37 (6.5-9.5) ..... .43-.55 (11.0-14\
.0)
P/S & A/C ........ .32-.35 (8.0-9.0) ..... .39](/img/19/57333/w960_57333-250.png "MITSUBISHI MONTERO 1998 Service Manual Generator ........ .30-.41 (7.5-10.5) ..... .35-.47 (9.0-12.0\
)
P/S (W/O A/C) .... .26-.37 (6.5-9.5) ..... .43-.55 (11.0-14\
.0)
P/S & A/C ........ .32-.35 (8.0-9.0) ..... .39")
Generator ........ .30-.41 (7.5-10.5) ..... .35-.47 (9.0-12.0\
)
P/S (W/O A/C) .... .26-.37 (6.5-9.5) ..... .43-.55 (11.0-14\
.0)
P/S & A/C ........ .32-.35 (8.0-9.0) ..... .39-.43 (10.0-11.0\
)
2.0L Turbo & 2.4L
A/C .............. .22-.24 (5.5-6.0) ....... .26-.30 (6.5-7.5\
)
Generator ........ .30-.35 (7.5-9.0) .............. .39 (10.0\
)
P/S .............. .18-.22 (4.5-5.5) ....... .24-.28 (6.0-7.0\
)
Galant
A/C ................ .22-.24 (5.5-6.0) ....... .26-.30 (6.5-7.6\
)
Generator .......... .30-.35 (7.5-8.8) .............. .39 (10.0\
)
P/S ................ .18-.22 (4.5-5.6) ....... .24-.28 (6.0-7.0\
)
Mirage
1.5L
A/C .............. .13-.17 (3.4-4.3) ....... .20-.22 (5.0-5.7\
)
Generator ........ .26-.33 (6.6-8.3) ...... .36-.42 (9.2-10.6\
)
P/S .............. .28-.36 (7.2-9.0) ..... .40-.46 (10.2-11.6\
)
1.8L
Generator ........ .28-.31 (7.0-8.0) ...... .33-.39 (8.5-10.0\
)
P/S & A/C ........ .28-.36 (7.0-9.0) ..... .39-.43 (10.0-11.0\
)
Montero
A/C ................ .20-.24 (5.0-6.0) ....... .26-.30 (6.5-7.5\
)
Generator .......... .16-.20 (4.0-5.0) ....... .22-.26 (5.5-6.5\
)
P/S ................ .42-.54 (10.7-13.7) ... .58-.66 (14.8-16.8\
)
Montero Sport
2.4L
A/C .............. .20-.22 (5.0-6.0) ....... .24-.26 (6.0-6.5\
)
Generator ........ .22-.29 (5.5-7.5) ....... .30-.33 (7.5-8.5\
)
P/S .............. .16-.24 (4.0-6.0) ....... .24-.28 (6.0-7.0\
)
3.0L
A/C .............. .17-.20 (4.3-5.1) ....... .22-.26 (5.6-6.5\
)
Generator ........ .22-.29 (5.5-7.5) ....... .31-.35 (8.0-9.0\
)
P/S .............. .44-.52 (11.0-13.0) ... .56-.64 (14.0-16.0\
)
3000GT
SOHC
A/C .............. .26-.28 (6.5-7.0) ....... .30-.34 (7.5-8.5\
)
Generator & P/S .. .16-.20 (4.0-5.0) ....... .24-.32 (6.0-8.0\
)
DOHC
Generator ........ .14-.16 (3.5-4.0) ....... .16-.20 (4.0-5.0\
)
P/S .............. .30-.35 (7.5-9.0) ..... .41-.49 (10.4-12.4\
)
(1) - With 22 lbs. (10 kg) pressure applied midway between pulleys.
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MECHANICAL CHECKS
ENGINE COMPRESSION
Check engine compression with engine at normal operating
temperature, all spark plugs removed and throttle wide open.
COMPRESSION SPECIFICATIONS TABLE
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Application (1) Specification
Compression Ratio
1.5L (VIN A) ..................................... 9.0:1
1.8L (VIN C) ..................................... 9.5:1
2.0L
(VIN F) ........................................ 8.5:1
(VIN Y) ........................................ 9.6:1
2.4L (VIN G) ..................................... 9.5:1
3.0L
Page 338 of 1501
Application Curb Idle Basic Idle
1.5L & 1.8L ............ 600-800 ............... 650-750
2.0L
Non-Turbo ............ 700-900 ................... (1)
Turbo ................ 650-850 ............... 700-800
2.4L ................... 650-850 ............... 700-800
3.0L & 3.5L ............ 600-800 ............... 650-750
( 1) - Information is not available from manufacturer at time
of publication.
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NOTE: Basic idle speed should only be adjusted after verifying
spark plugs, fuel injectors, idle air control motor and
engine compression are okay.
All Other Models
1) Ensure vehicle is at normal operating temperature with all
lights, cooling fan and accessories off. Shift transmission into
Neutral or Park position.
2) Basic idle speed can only be adjusted using a scan tool to
ground Data Link Connector (DLC). Connect scan tool to DLC. DLC is
located below dash, near steering column. See Fig. 2.
3) Start engine and allow it to idle. Using scan tool, select
MFI SYSTEM ACTUATOR TEST, then select item 30. Check basic idle speed.
See IDLE SPEED SPECIFICATIONS table.
CAUTION: MFI system actuator test must be cancelled or test will
continue to run for 27 minutes. Driving vehicle under this
condition may damage engine.
4) Cancel MFI system actuator test. If idle speed is not
within specification, turn engine speed adjusting screw until correct
engine speed is obtained. See Fig. 6. Access to speed adjusting screw
is obtained by removing rubber plug on throttle body.
5) If idle speed cannot be lowered by turning engine speed
adjusting screw, determine if fixed Speed Adjusting Screw (SAS). Fixed\
SAS is stop screw contacting throttle lever. See
FIXED SPEED ADJUSTING SCREW for procedure.
6) After all adjustments are verified to be correct, possible
cause of incorrect idle speed is deterioration of Idle Air Control
(IAC) circuit. See DTC P0505 in G - TESTS W/CODES article.
CURB (SLOW) IDLE SPEED
NOTE: Curb idle speed is controlled by Idle Air Control (IAC)
motor. Adjustment is usually not necessary. For curb idle
speed specifications, see IDLE SPEED SPECIFICATIONS table
under BASIC IDLE SPEED.
1) Check ignition timing and adjust if necessary. See
IGNITION TIMING . Run engine at 2000-3000 RPM for more than 5 seconds.
Allow engine to idle for 2 minutes. Check curb idle speed.
2) If curb idle speed is not within specification, check IAC
system. See DTC P0505 in G - TESTS W/CODES article. If IAC system is
okay, adjust basic idle speed. See BASIC IDLE SPEED.
FIXED SPEED ADJUSTING SCREW
NOTE: Fixed Speed Adjusting Screw (SAS) is preset by manufacturer
and usually does not require adjustment. Only adjust fixed
SAS if other adjustment procedures require it, or if
Page 702 of 1501
F - BASIC TESTING
1998 Mitsubishi Montero
1998 ENGINE PERFORMANCE
Mitsubishi - Basic Diagnostic Procedures
Diamante, Eclipse, Galant, Mirage, Montero, Montero Sport,
3000GT
INTRODUCTION
The following diagnostic steps will help prevent overlooking
a simple problem. This is also where to begin diagnosis for a no-start
condition. The first step in diagnosing any driveability problem is
verifying the customer's complaint with a test drive under the
conditions the problem reportedly occurred.
Before entering self-diagnostics, perform a careful and
complete visual inspection. Most engine control problems result from
mechanical breakdowns, poor electrical connections or
damaged/misrouted vacuum hoses. Before condemning the computerized
system, perform each test listed in this article.
NOTE: Perform all voltage tests with a Digital Volt-Ohmmeter
(DVOM) with a minimum 10-megohm input impedance, unless
stated otherwise in test procedure.
PRELIMINARY INSPECTION & ADJUSTMENTS
VISUAL INSPECTION
Visually inspect all electrical wiring, looking for chafed,
stretched, cut or pinched wiring. Ensure electrical connectors fit
tightly and are not corroded. Ensure vacuum hoses are properly routed
and are not pinched or cut. See M - VACUUM DIAGRAMS article to verify
routing and connections (if necessary). Inspect air induction system
for possible vacuum leaks.
MECHANICAL INSPECTION
Compression
Check engine mechanical condition with a compression gauge,
vacuum gauge, or an engine analyzer. See engine analyzer manual for
specific instructions.
WARNING: DO NOT use ignition switch during compression tests on fuel
injected vehicles. Use a remote starter to crank engine.
Fuel injectors on many models are triggered by ignition
switch during cranking mode, which can create a fire hazard
or contaminate the engine's oiling system.
Check engine compression with engine at normal operating
temperature, all spark plugs removed and throttle wide open. See
COMPRESSION SPECIFICATIONS table.
COMPRESSION SPECIFICATIONS TABLE
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Application (1) Specification
Compression Ratio
1.5L (VIN A) ..................................... 9.0:1
1.8L (VIN C) ..................................... 9.5:1
Page 756 of 1501
L - WIRING DIAGRAMS article.
1) Specific self-diagnostic test is not available from
manufacturer at time of publication. Check ignition coil, power
transistor, spark plugs, fuel injectors, heated oxygen sensor,
crankshaft position sensor, and related connectors and harnesses.
2) Also check compression pressure, timing belt, fuel
pressure, and for intake air leaks. See F - BASIC TESTING article.
DTC P0325: KNOCK SENSOR (KS) NO. 1 CIRCUIT FAILURE
NOTE: This test applies to 3000GT equipped with DOHC engine only.
For terminal identification, see TERMINAL IDENTIFICATION. For
circuit and wire color identification, see
L - WIRING DIAGRAMS article.
1) Component or scan tool testing procedure not available
from manufacturer at time of publication. Turn ignition switch to OFF
position. Disconnect KS connector and PCM connector. Ground PCM
connector terminal No. 91. Go to next step.
2) Using DVOM, check for continuity between chassis ground
and KS connector terminal No. 1. If continuity does not exist, repair
wiring harness as necessary. If continuity exists, go to next step.
3) Remove jumper wire from PCM connector terminal No. 1.
Check for continuity between chassis ground and KS connector terminal
No. 2. If continuity does not exist, repair wiring harness as
necessary. If continuity exists, go to next step.
4) Test is complete. Intermittent problem may exist. Road
test vehicle (if necessary) and attempt to duplicate conditions that
caused original complaint. Recheck for DTCs. If no DTCs are displayed,
go to INTERMITTENT DTCS .
DTC P0335: CRANKSHAFT POSITION (CKP) SENSOR CIRCUIT FAILURE
NOTE: For terminal identification, see TERMINAL IDENTIFICATION. For
circuit and wire color identification, see
L - WIRING DIAGRAMS article.
NOTE: Procedures are provided by manufacturer for component
testing using an engine analyzer with oscilloscope
capability. Refer to manufacturer's operation manual for
instructions in use of oscilloscope.
1) If using scan tool, go to step 3). Disconnect CKP sensor
connector. Install Test Harness (MB991348) between CKP sensor and
connector. Using engine analyzer with oscilloscope capability, connect
special patterns probe to CKP sensor connector terminal No. 2. Go to
next step.
2) Start engine. Compare oscilloscope wave pattern with
known-good wave pattern. See Fig. 38. Verify wavelength (time)
decreases as engine RPM increases. If wave pattern fluctuates to left
or right, check for loose timing belt or an abnormality in sensor
pick-up disc. If a rectangular wave pattern is generated even when
engine is not started, substitute known-good CKP sensor. Repeat test.
If wave pattern is still abnormal, go to step 6).
Fig. 38: Identifying Known-Good CKP Sensor Wave Pattern
Courtesy of Mitsubishi Motor Sales of America
Page 779 of 1501
complete cooling system. Test components as follows, following tool
manufacturer's instructions.
Radiator Cap
Visually inspect radiator cap, then dip cap into water and
connect to tester. Pump tester to bring pressure to upper limit of cap
specification. If cap fails to hold pressure, replace cap.
Fig. 2: Testing Radiator Pressure Cap
Cooling System
1) With engine off, wipe radiator filler neck seat clean.
Fill radiator to correct level. Attach tester to radiator and pump
until pressure is at upper level of radiator rating.
2) If pressure drops, inspect for external leaks. If no leaks
are apparent, detach tester and run engine until normal operating
temperature is reached. Reattach tester and observe. If pressure
builds up immediately, a possible leak exists from a faulty head
gasket or crack in head or block.
NOTE: Pressure may build up quickly. Release any excess pressure
or cooling system damage may result.
3) If there is no immediate pressure build up, pump tester to
within system pressure range (on radiator cap). Vibration of gauge
pointer indicates compression or combustion leak into cooling system.
Isolate leak by shorting each spark plug wire to cylinder block. Gauge
pointer should stop or decrease vibration when leaking cylinder is
shorted.
Page 1382 of 1501
Excessive Oil Worn valve stems or guides Replace stems or
Consumption guides, See ENGINES
Valve "O" ring seals Replace "O" ring seals,
damaged See ENGINES
Plugged oil drain back holes Remove restrictions
Improper PCV valve Replace PCV valve
operation
Engine oil level too high Remove excess oil
Engine oil too thin Replace thicker oil
Valve stem oil deflectors Replace oil deflectors
damaged
Incorrect piston rings Replace piston rings,
See ENGINES
Piston ring gaps not Reinstall piston rings,
staggered See ENGINES
Insufficient piston ring Replace rings, See
tension ENGINES
Piston ring grooves or oil Replace piston rings,
return slots clogged See ENGINES
Piston rings sticking in Replace piston rings,
grooves See ENGINES
Piston ring grooves Replace piston and
excessively worn rings, See ENGINES
Compression rings installed Replace compression
upside down rings correctly, See
ENGINES
Worn or scored cylinder Rebore cylinders or
walls replace block
Mismatched oil ring Replace oil ring
expander and rail expander and rail, See
ENGINES
Intake gasket dowels too Replace intake gasket
long dowels
Excessive main or connecting Replace main or
rod bearing clearance connecting rod
bearings, See ENGINES
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No Oil Pressure Low oil level Add oil to proper level
Oil pressure sender or Replace sender or gauge
gauge broken
Oil pump malfunction Remove and overhaul oil
pump, See ENGINES
Oil pressure relief valve Remove and reinstall
sticking valve
Oil pump passages blocked Overhaul oil pump, See
ENGINES
Oil pickup screen or tube remove restriction
blocked
Loose oil inlet tube Tighten oil inlet tube
Loose camshaft bearings Replace camshaft
bearings, See ENGINES
Internal leakage at oil Replace block or
passages cylinder head
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Low Oil Pressure Low engine oil level Add oil to proper level
Engine oil too thin Remove and replace with
thicker oil
Excessive oil pump Reduce oil pump
clearance clearance, See ENGINES
Oil pickup tube or screen Remove restrictions
blocked
Main, rod or cam bearing Replace bearing to
clearance excessive reduce clearance, See
Page 1388 of 1501
batteries
Bad starter connections Check connections
or bad starter and/or replace
batteries
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Engine Cranks Bad battery connections Check connections
Slowly, Won't or dead batteries and/or replace
Start batteries
Engine oil too heavy Replace engine oil
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Engine Cranks Glow plugs not functioning Check glow plug system,
Normally, But see FUEL SYSTEMS
Will Not Start Glow plug control not Check controller, see
functioning FUEL SYSTEMS
Fuel not injected into Check fuel injectors,
cylinders see FUEL SYSTEMS
No fuel to injection pump Check fuel delivery
system
Fuel filter blocked Replace fuel filter
Fuel tank filter blocked Replace fuel tank
filter
Fuel pump not operating Check pump operation
and/or replace pump
Fuel return system blocked Inspect system and
remove restriction
No voltage to fuel solenoid Check solenoid and
connections
Incorrect or contaminated Replace fuel
fuel
Incorrect injection pump Re-adjust pump timing,
timing see FUEL SYSTEMS
Low compression Check valves, pistons,
rings, see ENGINES
Injection pump malfunction Inspect and/or replace
injection pump
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Engine Starts, Incorrect slow idle Reset idle adjustment,
Won't Idle adjustment see TUNE-UP
Fast idle solenoid Check solenoid and
malfunctioning connections
Fuel return system blocked Check system and remove
restrictions
Glow plugs go off too soon See glow plug diagnosis
in FUEL SYSTEMS
Injection pump timing Reset pump timing, see
incorrect FUEL SYSTEMS
No fuel to injection pump Check fuel delivery
system
Incorrect or contaminated Replace fuel
fuel
Low compression Check valves, piston,
rings, see ENGINES
Injection pump malfunction Replace injection pump,
see FUEL SYSTEMS
Fuel solenoid closes in RUN Check solenoid and
position connections
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Engines Starts/ Incorrect slow idle Reset slow idle, see
Idles Rough W/out adjustment TUNE-UP
Smoke or Noise Injection line fuel leaks Check lines and
connections
Fuel return system blocked Check lines and
connections