Lexus GS300/400 (2000 year). Manual — part 134
A11125
Throttle Body and Intake Air Connector Assembly
Water Bypass Hose
PCV Hose
EVAP Hose
Gasket
Air Assist Hose
Vacuum
Hose
PS Air Hose
Air Intake Chamber
Engine Wire
Clamp
Drive Belt
Tensioner
Clamp Bracket
Ground Strap
Fuel Pressure
Pulsation Damper
Clamp Bracket
Water Bypass
Outlet
No.1 Water Bypass Pipe
No.3 Timing Belt Cover
O–Ring
Oil Filler Cap
Fuel Inlet Pipe
PS Air Hose
Hose
Clamp
Timing Belt
Tensioner
PS Pump Stay
Oil Dipstick
and Guide
for A/T
PS Vane Pump
Water Bypass Hose
28 (280, 21)
Engine Wire
O–Ring
No.2 Timing Belt Cover
Gasket
Gasket
21 (210, 15)
32.5 (325, 24)
Gasket
Gasket
Engine Wire
Clamp
O–Ring
O–Ring
Oil Dipstick and
Guide for Engine
27 (270, 20)
58 (590, 43)
39.2 (400, 29)
N·m (kgf·cm, ft·lbf) : Specified torque
Non–reusable Part
Dust Boot
Engine Wire
Clamp
No.2 Vacuum Pipe
Hose Clamp
Vacuum Control
Valve Set
EM–30
–
ENGINE MECHANICAL (2JZ–GE)
CYLINDER HEAD
1384
A11124
Ignition Coils and
High–Tension Cord
Assembly
Gasket
No.2 Cylinder Head Cover
Camshaft Timing Oil Control Valve
Exhaust Camshaft
No.1 Camshaft Bearing Cap
Gasket
No.1 Cylinder Head Cover
No.2 Camshaft Bearing Cap
x 6
x 24
x 6
20 (200, 15)
20 (200, 15)
Intake Camshaft
O–Ring
Gasket
Oil Control Valve Filter
x 14
No.3 Camshaft Bearing Cap
No.1 Oil Pipe
See page
1st 35 (350, 25)
2nd Turn 90
°
3rd Turn 90
°
Heater Hose
55 (550, 41)
Union Bolt
18 (180, 13)
Spark Plug
Oil Seal
No.4 Timing Belt Cover
Camshaft Timing Pulley
Cylinder Head Assembly
Intake Manifold Assembly
Manifold Stay
Cylinder Head Gasket
Gasket
x 7
81 (810, 60)
15 (150, 11)
8.0 (80, 71 in.·lbf)
N·m (kgf·cm, ft·lbf) : Specified torque
Non–reusable part
x 12
28 (280, 21)
Starter Wire
Straight
Screw Plug
Timing Belt
–
ENGINE MECHANICAL (2JZ–GE)
CYLINDER HEAD
EM–31
1385
A02822
Oil Seal
Non–reusable part
Precoated part
Gasket
Gasket
ECT Sensor
Valve Guide Bushing
Valve
Water Outlet with Water Bypass Hose
Camshaft Position Sensor
Engine Hanger
Heater Union
Cylinder Head
Spring Seat
Valve Spring
Spring Retainer
Keeper
Adjusting Shim
Valve Lifter
EM–32
–
ENGINE MECHANICAL (2JZ–GE)
CYLINDER HEAD
1386
EM0D1–05
A11132
Compression Tester
–
ENGINE MECHANICAL (2JZ–GE)
COMPRESSION
EM–3
1357
COMPRESSION
INSPECTION
HINT:
If there is 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 normal operating temperature.
2.
REMOVE ENGINE COVER
Remove the 4 nuts and engine cover.
3.
DISCONNECT IGNITION COILS AND HIGH–TENSION
CORD SET ASSEMBLY (See page
4.
REMOVE SPARK PLUGS
5.
DISCONNECT INJECTOR CONNECTORS
6.
CHECK CYLINDER COMPRESSION
(a)
Insert a compression tester into the spark plug hole.
(b)
While cranking the engine, measure the compression
pressure.
HINT:
Always use a fully charged battery to obtain engine revolutions
of 250 rpm or more.
(c)
Repeat steps (a) through (b) for each cylinder.
NOTICE:
This measurement must be done in as short a time as pos-
sible.
Compression:
1,324 kPa (13.5 kgf/cm
2
, 192 psi) or more
Minimum pressure:
1,079 kPa (11.0 kgf/cm
2
, 156 psi)
Difference between each cylinder:
98 kPa (1.0 kgf/cm
2
, 14 psi) or less
(d)
If the cylinder compression in 1 or more cylinders is low,
pour a small amount of engine oil into the cylinder through
the spark plug hole and repeat steps (a) through (b) for
the cylinder with low compression.
If adding oil helps the compression, it is likely that
the piston rings and/or cylinder bore are probably
worn or damaged.
If pressure stays low, a valve may be sticking or
seating improper, or there may be leakage past the
gasket.
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