Page 537 of 4770
58CHASSISÐDRIVE SHAFT
DRIVE SHAFT
DESCRIPTION
The 5S±FE engine model continues to use the same drive shaft used on the previous model.
Previously, the inboard joint of the drive shaft on the 1MZ±FE engine model was the bolt±mounted type. However,
on the new model, the inboard joint is the friction±welded integrated type.
On the new model with 1MZ±FE engine, the boot of the outboard joint are made of thermoplastic elastomer, which
has superior durability.
5S±FE Engine Model
1MZ±FE Engine Model
Page 711 of 4770

CAMRY ± OUTLINE OF NEW FEATURES
CAMRY
2
OUTLINE OF NEW FEATURES
The Camry is a high-quality family sedan with advanced technology and sporty performance. The following
changes are made for the 1998 model year.
1. Model Line-Up
The SXV20L-AEPNKK and MCV20L-A (C) EPGKK models have been added.
The MCV20L-CEPNKK model has been discontinued.
2. Interior Equipment
An extensible assist grip has been newly provided for the front passenger.
3. 5S-FE Engine
ORVR (On-Board Refueling Vapor Recovery) System has been adopted.
4. 1MZ-FE Engine
The 1MZ-FE engine with automatic transaxle on the California specification model uses the air-fuel ratio
sensor and the WU-TWC (Warm Up-Three-Way Catalytic Converters) to reduce exhaust emissions.
5. Body
The cross section shape of the outside windshield moulding has been changed to reduce the wind noise.
The front door window glass has been increased in thickness to reduce the amount of noise transmitted
from the outside of the vehicle.
Front seat belt with pretensioner and force limiter has been adopted.
6. Engine Immobiliser System
An engine immobiliser system has been newly provided to help improve the vehicle's theft prevention perfor-
mance.
7. Theft Deterrent System
The starter cutoff function has been discontinued along with the adoption of the engine immobiliser sys-
tem.
The illumination pattern of the indicator light which indicates the condition of the system has been
changed.
Page 715 of 4770
CAMRY ± NEW FEATURES 6
NEW FEATURES
5S-FE ENGINE
1. Description
The following changes have been made to the 5S-FE engine.
Item
Details
Fuel System
ORVR (On-board Refueling Vapor Recovery) system has been adopted
to reduce the amount of fuel vapor that is discharged to the atmosphere
during refueling. The operation and construction of the ORVR system are
the same as those of the '98 Corolla. For details, see the '98 Corolla New
Car Features (Pub. No. NCF148U).
Engine Control
System
The diagnostic function of the evaporative emission control system,
which was adopted on the previous automatic transaxle model, has been
newly adopted also on the manual transaxle model.
The engine immobiliser function has been integrated with the ECM. For
details, see page 23.
*: Applicable only to Vehicle Equipped with the Engine Immobiliser System.
Page 956 of 4770

'99camry U
160
Ty p e C
The three±way catalytic converter is an
emission control device installed in the
exhaust system.
The purpose is to reduce pollutants in the
exhaust gas.
CAUTION
Keep people and combustible mate-
rials away from the exhaust pipe
while the engine is running. The
exhaust gas is very hot.
Do not drive, idle or park your ve-
hicle over anything that might burn
easily such as grass, leaves, paper
or rags.
NOTICE
A large amount of unburned gases
flowing into the three±way catalytic
converter may cause it to overheat
and create a fire hazard. To prevent
this and other damage, observe the
following precautions:
Use only unleaded gasoline.
Do not drive with an extremely low
fuel level; running out of fuel could
cause the engine to misfire, creat-
ing an excessive load on the three±
way catalytic converter.
Do not allow the engine to run at
idle speed for more than 20 min-
utes.
Avoid racing the engine.
Do not push±start or pull±start your
vehicle.
Do not turn off the ignition while
the vehicle is moving.
Page 958 of 4770

'99camry U
162
FUNCTIONS OF ENGINE OIL
Engine oil has the primary functions of
lubricating and cooling the inside of the
engine, and plays a major role in main-
taining the engine in proper working order.
ENGINE OIL CONSUMPTION
It is normal that an engine should con-
sume some engine oil during normal
engine operation. The causes of oil
consumption in a normal engine are as
follows.
Oil is used to lubricate pistons, piston
rings and cylinders. A thin film of oil
is left on the cylinder wall when a pis-
ton moves downwards in the cylinder.
High negative pressure generated when
the vehicle is decelerating sucks some
of this oil into the combustion chamber.
This oil as well as some part of the oil
film left on the cylinder wall is burned
by the high temperature combustion
gases during the combustion process.
Oil is also used to lubricate the stems
of the intake valves. Some of this oil
is sucked into the combustion chamber
together with the intake air and is
burned along with the fuel. High tem-
perature exhaust gases also burn the
oil used to lubricate the exhaust valve
stems.
The amount of engine oil consumed de-
pends on the viscosity of the oil, the
quality of the oil and the conditions the
vehicle is driven under.
More oil is consumed by high±speed driv-
ing and frequent acceleration and decel-
eration.
A new engine consumes more oil, since
its pistons, piston rings and cylinder walls
have not become conditioned.
When judging the amount of oil con-
sumption, note that the oil may become
diluted and make it difficult to judge
the true level accurately.
As an example, if a vehicle is used for
repeated short trips, and consumes a nor-
mal amount of oil, the dipstick may not
show any drop in the oil level at all, even
after 1000 km (600 miles) or more. This
is because the oil is gradually becoming
diluted with fuel or moisture, making it
appear that the oil level has not changed.The diluting ingredients evaporate out
when the vehicle is then driven at high
speeds, as on an express way, making it
appear that oil is excessively consumed
after driving at high speeds.
IMPORTANCE OF ENGINE OIL LEVEL
CHECK
One of the most important points in prop-
er vehicle maintenance is to keep the en-
gine oil at the optimum level so that oil
function will not be impaired. Therefore, it
is essential that the oil level be checked
regularly. Toyota recommends that the oil
level be checked every time you refuel
the vehicle.
NOTICE
Failure to check the oil level regularly
could lead to serious engine trouble
due to insufficient oil.
For detailed information on oil level check,
see ºChecking the engine oil levelº in
Chapter 7±2.
Facts about engine oil
consumption
Page 1065 of 4770

INTRODUCTION
INTRODUCTION Ð OUTLINE OF NEW FEATURES3
OUTLINE OF NEW FEATURES
An engine that is based on the 5S-FE engine, yet uses natural gas, has been developed in order to reduce
exhaust emissions and the amount of CO
2 discharge. A model that uses this alternative fuel engine has been
added to the Camry lineup. The characteristics of the new model are listed below.
1. Exterior
A CNG (Compressed Natural Gas) mark is affixed to the luggage compartment door.
2. 5S-FNE Engine
Based on the 5S-FE gasoline engine, the 5S-FNE engine uses compressed natural gas. The fuel lines have
been designed exclusively for compressed natural gas application.
3. A140E Automatic Transaxle
The gear ratio of the differential has been changed to accommodate the performance of the 5S-FNE engine.
4. Brakes
Basically, the same brakes used on the 5S-FE engine model are used on the CNG model, except that the
size of the front brakes has been changed.
5. Suspension
To accommodate the weight increase of the rear section of the vehicle as a result of having the fuel tank
installed in the luggage compartment, the specification of the springs used in the rear suspension has been
changed to realize excellent riding comfort, stability, and controllability.
6. Tire
P205/65 R 15 tire is used.
7. Body
To install the fuel tank in the front area of the luggage compartment, the upper back panel has been
cut out.
A performance rod that joins the tops of the right and left rear suspension strut towers has been adopted.
The shape of the rear floor pan has been changed to prevent the luggage compartment capacity from
being reduced as a result of the installation of the fuel tank in the luggage compartment.
8. Seat
A fixed type seat back is used for the rear seat.
9. Seat Belt
2-point NR (Non-Retractor) seat belt is used for the rear center seat.
10. SRS Airbag
A signal that causes the supply of fuel to be cut off during a frontal collision is output by the airbag sensor
assembly to the ECM.
Page 1069 of 4770

NEW FEATURES Ð 5S-FNE ENGINE
NEW FEATURES
6
5S-FNE ENGINE
DESCRIPTION
The 5S-FNE engine is a new engine that uses CNG (Compressed Natural Gas) as fuel, which has been
developed based on the 5S-FE gasoline engine.
The main component of natural gas is methane (CH
4), which has fewer carbons (C) than gasoline (mean
molecular formula: C
7.5H13.4). Therefore, the amount of CO2 discharged by this engine is approximately
70% that of the gasoline engine. Furthermore, this engine achieves low-emission operation by precisely
controlled air-fuel ratio and using special catalysts for the CNG application.
However, because the fuel is in the gaseous form, its volumetric efficiency is low, causing lower power
output if this fuel is used in the base engine.
Therefore, the 5S-FNE engine has adopted the following features: a high compression ratio, the intake
valves with early closed timing, the intake and exhaust valves with increased lift, a low back pressure muffler
made possible by the 2-way exhaust system, injectors for gaseous fuel, and a catalytic converter designed
exclusively for CNG application. At the same time, precision air-fuel ratio control is effected through the
use of the air-fuel ratio sensor* and the heater oxygen sensor, thus achieving the level of performance that
is equivalent to the base engine. Moreover, this engine realizes extremely low emissions and restoring engine
torque.
*: Already adopted on the California specification 5S-FE engine.
Specifications
Item
5S-FNE Engine5S-FE Engine
No. of Cyls. & Arrangement4-Cylinder, In-Line
Valve Mechanism16-Valve DOHC,
Belt & Gear Drive
Combustion CamberPentroof Type
ManifoldsCross-Flow
Fuel SystemSFI
Displacement cm3 (cu. in.)2164 (132.0)
Bore Stroke mm (in.)87.0 91.0 (3.43 3.58)
Compression Ratio11.0 : 19.5 : 1
Max. Output [SAE-NET]88 kW @ 5200 rpm
(118 HP @ 5200 rpm)
99 kW @ 5200 rpm
(133 HP @ 5200 rpm)
97 kW @ 5200 rpm*
(130 HP @ 5200 rpm)*
Max. Torque [SAE-NET]178 N´m @ 2400 rpm
(131 ft´lbf @ 2400 rpm)
199 N´m @ 4400 rpm
(147 ft´lbf @ 4400 rpm)
197 N´m @ 4400 rpm*
(145 ft´lbf @ 4400 rpm)*
IntakeOpen35 BTDC
Valve
IntakeClose385 ABDC435 ABDCValve
Timing
ExhaustOpen455 BBDCExhaustClose35 AT D C
Fuel Octane Number RON13091
Oil GradeAPI SJ EC or ILSAC
*: California Specification Models
Page 1072 of 4770
NF
NEW FEATURES Ð 5S-FNE ENGINE9
ENGINE PROPER
1. General
The cylinder head and the pistons have been changed for the CNG application.
2. Cylinder Head
Materials that excel in wear resistance have been adopted on the valve seats for both the intake and
exhaust.
The shape of the holes into which the injectors mount has been changed to accommodate the injectors
designed exclusively for the CNG application.
The shape of water jacket around plug has been modified to prevent the deformation.
3. Piston
To achieve a high compression ratio, the shape of the top of the piston has been changed and pin boss
hole with taper has been adopted.
An additional surface treatment has been provided to improve heat resistance.
The material has been changed to increase rigidity.
167CN03
167CN02
5S-FNE Engine 5S-FE Engine