Lexus RX300 (MCU15). Service manual - part 428

B12568

N·m (kgf·cm, ft·lbf) : Specified torque

z

 Non–reusable part

WU–TWC for Bank 2

z

 Gasket

WU–TWC
(for Bank 2)

62 (630, 46)

56 (570, 41)

z

 Gasket

Engine Under Cover

z

z

x 8

–

EMISSION CONTROL

WARM UP THREE–WAY CATALYTIC CONVERTER 
(WU–TWC) SYSTEM

EC–9

LEXUS RX300   (RM785E)

EC022–02

EC–10

–

EMISSION CONTROL

THREE–WAY CATALYTIC CONVERTER (TWC) 
SYSTEM

LEXUS RX300   (RM785E)

THREE–WAY CATALYTIC CONVERTER (TWC) SYSTEM

ON–VEHICLE INSPECTION

1.

INSPECT EXHAUST PIPE ASSEMBLY

(a)

Check the connections for looseness or damage.

(b)

Check the clamps for weakness, cracks or damage.

2.

INSPECT TWC

Check for dents or damage.
If any part of the protector is damaged or dented to the extent that it contacts the TWC, repair or replace
it.
3.

INSPECT TWC HEAT INSULATOR

(a)

Check the heat insulator for damage.

(b)

Check for adequate clearance between the catalytic converter and heat insulator.

EC023–08

B12569

N·m (kgf·cm, ft·lbf) : Specified torque

z

 Non–reusable part

z

 Gasket

z

 Gasket

Center Exhaust Pipe

48 (490, 36)

48 (490, 36)

Ring

Ring

TWC

Heated Oxygen 
Sensor Protector

Gasket

Heated Oxygen Sensor
(Bank 1 Sensor 1)

z

20 (200, 14)

Compression Spring

62 (630, 46)

Compression Spring

Compression Spring

–

EMISSION CONTROL

THREE–WAY CATALYTIC CONVERTER (TWC) 
SYSTEM

EC–11

LEXUS RX300   (RM785E)

COMPONENTS

ENGINE MECHANICAL

CO/HC

EM–1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

COMPRESSION

EM–3

. . . . . . . . . . . . . . . . . . . . . . . . . 

VALVE CLEARANCE

EM–4

. . . . . . . . . . . . . . . . . . . . . 

IGNITION TIMING

EM–10

. . . . . . . . . . . . . . . . . . . . . . . 

IDLE SPEED

EM–12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

TIMING BELT

EM–13

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

CYLINDER HEAD

EM–27

. . . . . . . . . . . . . . . . . . . . . . . . 

ENGINE UNIT

EM–71

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

CYLINDER BLOCK

EM–88

. . . . . . . . . . . . . . . . . . . . . . . 

EXHAUST SYSTEM

EM–117

. . . . . . . . . . . . . . . . . . . . . .