Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Land Cruiser 1986.1998-2007 Approved 98-07 Engine Mechanical
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EM-1
ENGINE MECHANICAL - CO/HC
CO/HC EM0KQ-07
INSPECTION
HINT:
This check is used only to determine whether or not the idle CO/
HC complies with regulations.
1. INITIAL CONDITIONS
(a) The engine is at normal operating temperature.
(b) Air cleaner is installed.
(c) All pipes and hoses of the air induction system are con-
nected.
(d) All accessories are switched OFF.
(e) All vacuum lines are properly connected.
HINT:
All vacuum hoses should be properly connected.
(f) SFI system wiring connectors are fully plugged.
(g) Ignition timing is set correctly.
(h) Transmission is in neutral range.
(i) Tachometer and CO/HC meter are calibrated by hand.
2. START ENGINE
3. RACE ENGINE AT 2,500 RPM FOR APPROX. 180
SECONDS
CO/HC Meter
4. INSERT CO/HC METER TESTING PROBE AT LEAST
40 cm (1.3 ft) INTO TAILPIPE DURING IDLING
5. IMMEDIATELY CHECK CO/HC CONCENTRATION AT
IDLE AND/OR 2,500 RPM
HINT:
When performing the 2 mode (2,500 rpm and idle) test, follow
the measurement order prescribed by the applicable local regu-
lations.
A05510
2004 LAND CRUISER (RM1071U)
Author : Date : 1574
EM-2
ENGINE MECHANICAL - CO/HC
6. TROUBLESHOOTING
HINT:
If the CO/HC concentration does not comply with the regula-
tions, perform troubleshooting in the order given below.
See the table below for possible causes, and then inspect and
correct the applicable causes if necessary.
CO HC Problems Causes
Normal High Rough idle 1. Faulty ignitions:
L Incorrect timing
L Fouled, shorted or improperly gapped plugs
2. Incorrect valve clearance
3. Leaky intake and exhaust valves
4. Leaky cylinders
Low High Rough idle 1. Vacuum leaks:
(fluctuating HC reading) L PCV hoses
L Intake manifold
L Throttle body
L Brake booster line
2. Lean mixture causing misfire
High High Rough idle 1. Restricted air filter
(Black smoke from exhaust) 2.Faulty SFI systems:
L Faulty pressure regulator
L Defective ECT sensor
L Faulty ECM
L Faulty injectors
L Faulty throttle position sensor
L Faulty MAF meter
2004 LAND CRUISER (RM1071U)
Author : Date : 1575
EM-3
ENGINE MECHANICAL - COMPRESSION
COMPRESSION EM0KR-09
INSPECTION
HINT:
If there is a lack of power, excessive oil consumption or poor fuel
economy, measure the compression pressure.
1. WARM UP AND STOP ENGINE
Allow the engine to warm up to the normal operating tempera-
ture.
2. REMOVE SPARK PLUGS
(See page IG-1 )
3. CHECK CYLINDER COMPRESSION PRESSURE
Compression (a) Insert a compression gauge into the spark plug hole.
Gauge (b) Fully open the throttle.
(c) While cranking the engine, measure the compression
pressure.
HINT:
Always use a fully charged battery to obtain the engine speed
at 250 rpm or more.
A04458 (d) Repeat steps (a) to (c) for each cylinder.
NOTICE:
This measurement must be done as quickly as possible.
Compression pressure:
1,324 kPa (13.5 kgf/cm2, 192 psi) or more
Minimum pressure:
981 kPa (10.0 kgf/cm2, 142 psi)
Difference between each cylinder:
98 kPa (1.0 kgf/cm2, 14 psi) or less
(e) If the cylinder compression in one or more cylinders is
lower than the specification, pour a small amount of en-
gine oil into the cylinder through the spark plug hole and
repeat steps (a) to (c) for the cylinders.
L If adding oil helps the compression, chances are
that the piston rings and/or cylinder bore are worn
or damage.
L If the pressure stays low, a valve may be sticking or
the seating is improper, or there may be leakage
past the gasket.
4. REINSTALL SPARK PLUGS
(See page IG-1 )
2004 LAND CRUISER (RM1071U)
Author : Date : 1576
EM-86
ENGINE MECHANICAL - CYLINDER BLOCK
CYLINDER BLOCK
EM0E9-15
COMPONENTS
Engine Wire
Oil Cooler Pipe Protector
Bracket for A/T Starter
Water Bypass Pipe Ground
Cable
z O-Ring
Water Pump
Engine Wire
45 (450, 33)
Starter
x5 z Gasket
Cable
Engine Mounting Bracket Starter
Knock
36 (370, 27) Connector
Sensor 2 Knock
Sensor 1 Knock
Engine Coolant Sensor 2
Drain Union Connector
Oil Pump Knock
30.5 (310, 22) Sensor 1
Engine
Wire Connector
z O-Ring
z Crankshaft
Engine
Front Oil L Engine Coolant Drain Union
Seal Wire
Cover
z Gasket
15.5 (160, 11)
Crankshaft Position Engine
Sensor Connector Mounting
Bracket
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