Lexus ES300 (2002 year). Manual — part 138

ENGINE – 1MZ-FE ENGINE

EG-4

FEATURES OF 1MZ-FE ENGINE

The 1MZ-FE engine has been able to achieve the following performance through the adoption of the item
listed below.

(1) High performance and fuel economy

(2) Low noise and vibration

(3) Lightweight and compact design

(4) Good serviceability

(5) Clean emission

Item

(1)

(2)

(3)

(4)

(5)

’02 ES300

’01 ES300

The VVT-i system is used.

The ETCS-i has been adopted.

—

A cylinder block made of aluminum alloy has
been adopted.

The intake air chamber made of plastics has
been adopted.

—

Independent type DIS (Direct Ignition
System) has been adopted.

The fuel returnless system has been adopted.

Quick connectors are used to connect the fuel
hose with the fuel pipes.

12-hole type fuel injectors with high
atomizing performance have been adopted.

—

Iridium-tipped spark plugs have been
adopted.

ACIS (Acoustic Control Induction System)
is used.

Air intake control system has been adopted.

—

A 2-way exhaust control system has been
adopted.

The use of an air fuel ratio sensor allows
precise control.

The PS (Planetary reduction-Segment
conductor motor) starter has been adopted.

—

Other parts and construction are the same as in the ’01 ES300

ENGINE – 1MZ-FE ENGINE

EG-14

211EG07

Oil Pump

Oil Strainer

Oil Filter

BYPASS
VALVE

RELIEF
VALVE

OIL FILTER

OIL PUMP

OIL STRAINER

CYLINDER HEAD
(FOR LEFT BANK)

EXHAUST
CAMSHAFT
JOURNALS

INTAKE
CAMSHAFT
JOURNALS

SCISSORS
GEAR MECHANISM

CAMSHAFT
TIMING OIL
CONTROL FILTER

VVT-i

MAIN OIL HOLE

CRANKSHAFT
JOURNAL

CRANKSHAFT
PINS

OIL JETS

PISTONS

VVT-i

CYLINDER HEAD
(FOR RIGHT BANK)

INTAKE
CAMSHAFT
JOURNALS

EXHAUST
CAMSHAFT
JOURNALS

SCISSORS GEAR
MECHANISM

OIL PAN

187EG22

CAMSHAFT
TIMING OIL
CONTROL VALVE

CAMSHAFT
TIMING OIL
CONTROL FILTER

CAMSHAFT
TIMING OIL
CONTROL VALVE

LUBRICATION SYSTEM

1. General

The lubrication is fully pressurized and all oil passes through an oil filter.
A trochoid gear type oil pump is directly driven by the crankshaft.

ENGINE – 1MZ-FE ENGINE

EG-15

Specifications

Oil Capacity

Dry

5.5 (5.8, 4.8)

with Oil Filter

4.7 (5.0, 4.1)

Liters (US qts, Imp. qts)

without Oil Filter

4.5 (4.8, 4.0)

ENGINE – 1MZ-FE ENGINE

EG-26

161ES43

Camshaft
Position
Sensor

Crankshaft
Position
Sensor

Various
Sensors

G22

NE

ECM

IGT1

IGT2

IGT3

IGT4

IGT5

IGT6

IGF

+B

Ignition Coil (with Igniter)

No.1 Cylinder

No.2 Cylinder

No.3 Cylinder

No.4 Cylinder

No.5 Cylinder

No.6 Cylinder

208EG70

Iridium Tip

IGNITION SYSTEM

1. General

A DIS (Direct Ignition System) has been adopted. The DIS improves the ignition timing accuracy, reduces

high-voltage loss, and enhances the overall reliability of the ignition system by eliminating the distributor.
The DIS in this engine is an independent ignition system which has one ignition coil (with igniter) for each
cylinder.

Iridium-tipped spark plugs have been adopted.

2. Ignition Coil

The DIS provides 6 ignition coils, one for each cylinder. The spark plug caps, which provide contact to the
spark plugs, are integrated with an ignition coil. Also, an igniter is enclosed to simplify the system.

3. Spark Plug

Iridium-tipped spark plugs have been adopted to realize a 120,000 mile (192,000 km) maintenance-free op-
eration. By making the center electrode of iridium, the same ignition performance as of the platinum-tipped
spark plug and further improvement of durability have been realized.

Specifications

DENSO

SK20R11

NGK

IFR6A11

Plug Gap

1.0 – 1.1 mm

(0.0394 – 0.043 mm)