spark plugs TOYOTA RAV4 1996 Service Repair Manual

EM0EH−03
S01361
Compression
Gauge
− ENGINE MECHANICALCOMPRESSION
EM−3
1996 RAV4 (RM447U)
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. DISCONNECT DISTRIBUTOR CONNECTOR
3. DISCONNECT HIGH−TENSION CORDS FROM SPARK
PLUGS AND IGNITION COIL
4. REMOVE SPARK PLUGS
5. CHECK CYLINDER COMPRESSION PRESSURE
(a) Insert a compression gauge into the spark plug hole.
(b) Fully open the throttle.
(c) While cranking the engine, measure the compression
pressure.
HINT:
Always use a fully charged battery to obtain engine speed of
250 rpm or more.
(d) Repeat steps (a) through (c) for each cylinder.
NOTICE:
This measurement must be done in as short a time as pos-
sible.
Compression pressure:
1,275 kPa (13.0 kgf/cm
2, 185 psi) or more
Minimum pressure: 932 kPa (9.5 kgf/cm
2, 135 psi)
Difference between each cylinder:
98 kPa (1.0 kgf/cm
2, 14 psi) or less
(e) If the cylinder compression in one 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 (c) for
cylinders with low compression.
If adding oil helps the compression, it is likely that
the piston rings and/or cylinder bore are worn or
damaged.
If pressure stays low, a valve may be sticking or
seating is improper, or there may be leakage past
the gasket.
6. REINSTALL SPARK PLUGS
7. RECONNECT HIGH−TENSION CORDS TO SPARK
PLUGS AND IGNITION COIL

EM0EI−02
S01653
21
S01367
− ENGINE MECHANICALVALVE CLEARANCE
EM−5
1996 RAV4 (RM447U)
VALVE CLEARANCE
INSPECTION
HINT:
Inspect and adjust the valve clearance when the engine is cold.
1. DISCONNECT PS RESERVOIR
2. REMOVE CYLINDER HEAD COVER
(a) Disconnect the accelerator cable from the throttle body.
(b) Disconnect the accelerator cable from the clamp on the
intake manifold.
(c) Disconnect the accelerator cable from the clamp on the
generator bracket.
(d) Disconnect the A/T throttle control cable from the throttle
body.
(e) Disconnect the PCV hose from the air cleaner hose.
(f) Disconnect the PCV hose from the intake manifold.
(g) Disconnect the high−tension cords from the spark plugs.
(h) Remove the 2 bolts, and disconnect the accelerator cable
bracket from the intake manifold.
(i) Disconnect the engine wire protector from the 2 mounting
bolts of the No. 2 timing belt cover in the sequence shown.
(j) Remove the 4 nuts, grommets, cylinder head cover and
gasket.
HINT:
Arrange the grommets in the correct order, so that they can be
reinstalled into their original positions. This minimizes any pos-
sibility of oil leakage due to reuse of the grommets in different
positions.

P03518
: Seal Packing
P01655
Marking
30°
Z17351
2 1 EM−10
− ENGINE MECHANICALVALVE CLEARANCE
1996 RAV4 (RM447U)
6. REINSTALL CYLINDER HEAD COVER
(a) Remove any old packing (FIPG) material.
(b) Apply seal packing to the cylinder head as shown in the
illustration.
Seal packing: Part No. 08826−00080 or equivalent
(c) Install the gasket to the cylinder head cover.
(d) Install the head cover with the 4 grommets and nuts. Uni-
formly tighten the nuts in several passes.
Torque: 23 N·m (230 kgf·cm, 17 ft·lbf)
HINT:
Install the grommets so that their markings are as shown in the
illustration.
(e) Install the engine wire protector to the 2 mounting bolts of
the No. 2 timing belt cover in the sequence shown.
(f) Connect the high−tension cords to the spark plugs.
(g) Install the accelerator cable bracket with the 2 bolts.
(h) Connect the accelerator cable to the throttle body.
(i) Connect the accelerator cable to the clamp on the intake
manifold.
(j) Connect the accelerator cable to the clamp on the gener-
ator bracket.
(k) Connect the A/T throttle control cable to the throttle body.
(l) Connect the PCV hose to the air cleaner hose.
(m) Connect the PCV hose to the intake manifold.
7. CONNECT PS RESERVOIR

EM0EM−03
S01283
B
SST
A
S01358
Oil Pump
S01630
SST
SST
− ENGINE MECHANICALTIMING BELT
EM−15
1996 RAV4 (RM447U)
REMOVAL
1. DISCONNECT PS RESERVOIR AND REMOVE RES-
ERVOIR BRACKET
2. DISCONNECT WIRE HARNESS BRACKET FOR DLC1
3. REMOVE GENERATOR (See page CH−7)
4. REMOVE GENERATOR BRACKET
5. w/ ABS:
REMOVE NO. 3 ABS ACTUATOR BRACKET (See page
BR−40)
6. REMOVE RH FRONT WHEEL
7. REMOVE RH ENGINE UNDER COVER
8. REMOVE PS PUMP DRIVE BELT
(a) Loosen the bolt A.
(b) Using SST and a deep socket wrench, loosen the bolt B.
SST SST09249−63010
(c) Remove the drive belt.
9. SLIGHTLY JACK UP ENGINE
Attach the jack to the oil pan, and raise the engine enough to
remove the weight from the engine mounting on the right side.
10. REMOVE RH ENGINE MOUNTING INSULATOR
11. REMOVE SPARK PLUGS
12. REMOVE CRANKSHAFT PULLEY
(a) Using SST (and bolt), remove the pulley bolt.
SST 09213−54015 (91651−60855 for type A),
09330−00021
Bolt: Part No. 91121−40665 for type B
HINT:
Either of 2 types of pulley may be used, each with its own
bolt size, type A and type B.
When using bolt type B, a plate washer must be inserted
between the bolt and SST.

S01626
Disconnect
P15391
S01284
SST
S01629
SSTSST
− ENGINE MECHANICALTIMING BELT
EM−25
1996 RAV4 (RM447U)
Remove the backing paper from a new gasket and
install the gasket evenly to the part of the timing belt
cover shaded black in the illustration.
After installing the gasket, press down on it so that
the adhesive firmly sticks to the timing belt cover.
(b) Disconnect the engine wire protector between the cylin-
der head cover and No. 3 timing belt cover.
(c) Install the No. 2 timing belt cover with the 4 bolts.
(d) Install the engine wire to the No. 2 timing belt cover.
(e) Install the engine wire protector to the 2 mounting bolts of
the No. 2 timing belt cover in the sequence shown.
15. REMOVE CRANKSHAFT PULLEY
16. INSTALL RH ENGINE MOUNTING BRACKET
Using SST, install the mounting bracket with the 3 bolts.
SST 09249−63010
Torque:
52 N·m (530 kgf·cm, 38 ft·lbf)
35 N·m (360 kgf·cm, 26 ft·lbf) for SST
HINT:
Use a torque wrench with a fulcrum length of 340 mm (13.39 in)
17. INSTALL CRANKSHAFT PULLEY
(a) Align the pulley set key with the key groove of the pulley,
and slide on the pulley.
(b) Using SST (and bolt), install the pulley bolt.
SST 09213−54015 (91651−60855 for type A),
09330−00021
Bolt: Part No. 91121−40665 for type B
Torque: 108 N·m (1,100 kgf·cm, 80 ft·lbf)
18. INSTALL SPARK PLUGS

METER, ANALOG
Current flow activates a magnetic
coil which causes a needle to
move, thereby providing a relative
display against a background
calibration. LED (LIGHT EMITTING DIODE)
Upon current flow, these diodes
emit light without producing the
heat of a comparable light. IGNITION COIL
Convert low-voltage DC current
into high-voltage ingition current
for firing the spark plugs. 1. SINGLE
FILAMENT
GROUND
The point at which wiring attaches
to the Body, thereby providing a
return path for an electrical circuit;
without a ground, current cannot
flow.
Current flow causes a headlight
filament to heat up and emit light.
A headlight may have either a
single (1) filament or a double (2)
filament. BATTERY
Stores chemical energy and
converts it into electrical energy.
Provides DC current for the auto's
various electrical circuits.
CAPACITOR (Condenser)
A small holding unit for temporary
storage of electrical voltage.
CIRCUIT BREAKER
Basically a reusable fuse, a circuit
breaker will heat and open if too
much current flows through it. Some
units automatically reset when cool,
others must be manually reset.
DIODE
A semiconductor which allows
current flow in only one direction.
DIODE, ZENER
A diode which allows current flow
in one direction but blocks reverse
flow only up to a specific voltage.
Above that potential, it passes the
excess voltage. This acts as a
simple voltage regulator.
PHOTODIODE
The photodiode is a semiconductor
which controls the current flow
according to the amount of light.
FUSE
A thin metal strip which burns
through when too much current
flows through it, thereby stopping
current flow and protecting a
circuit from damage.
FUSIBLE LINK
A heavy-gauge wire placed in
high amperage circuits which
burns through on overloads,
thereby protecting the circuit.
The numbers indicate the cross-
section surface area of the wires.HORN
An electric device which sounds a
loud audible signal.
LIGHT
Current flow through a filament
causes the filament to heat up
and emit light.
METER, DIGITAL
Current flow activates one or
many LED's, LCD's, or fluorescent
displays, which provide a relative
or digital display.
MOTOR
A power unit which converts
electrical energy into mechanical
energy, especially rotary motion. CIGARETTE LIGHTER
An electric resistance heating
element.
DISTRIBUTOR, IIA
Channels high-voltage current
from the ignition coil to the
individual spark plugs.2. DOUBLE
FILAMENT HEADLIGHTS
FUEL
(for High Current Fuse or
Fusible Link.)
(for Medium Current Fuse)
M
16
E GLOSSARY OF TERMS AND SYMBOLS

B11562
P17875
Ohmmeter
IG0147
Megger
Ground
N00917
− IGNITIONIGNITION SYSTEM
IG−3
1996 RAV4 (RM447U)
2. INSPECT HIGH−TENSION CORDS
(a) Disconnect the high−tension cords from spark plug.
Disconnect the high−tension cords at the rubber boot. Do
not pull on the high−tension cords.
NOTICE:
Pulling on or bending the cords may damage the conductor
inside.
(b) Disconnect the high−tension cords from ignition coil.
(c) Disconnect the high−tension cords from distributor cap.
(d) Inspect the high−tension cord resistance.
Using an ohmmeter, measure the resistance.
Maximum resistance: 25 kΩ per cord
If the resistance is greater than maximum, check the terminals.
If necessary, replace the high−tension cord.
(e) Reconnect the high−tension cords to distributor cap.
(f) Reconnect the high−tension cord to ignition coil.
(g) Reconnect the high−tension cords to spark plugs.
3. INSPECT SPARK PLUGS
NOTICE:
Never use a wire brush for cleaning.
Never attempt to adjust the electrode gap on a used
spark plug.
Spark plugs should be replaced every 100,000 km
(60,000 miles).
(a) Disconnect the high−tension cords from the spark plugs.
(b) Using a megger (insulation resistance meter), measure
the insulation resistance.
Standard correct insulation resistance:
10 MΩ or more
If the resistance is less than specified, proceed to step (d).
HINT:
If a megger is not available, the following simple method of in-
spection provides fairly accurate results.
Simple Method:
Quickly race the engine to 4,000 rpm 5 times.
Remove the spark plug. (See step (c))
Visually check the spark plug.
If the electrode is dry... OK
If the electrode is wet... Proceed to step (d)
Reinstall the spark plug. (See step (g))

S05308
16mm Plug
Wrench
Z00032
IG0152
IG−4
− IGNITIONIGNITION SYSTEM
1996 RAV4 (RM447U)
(c) Using a 16 mm plug wrench, remove the 4 spark plugs.
(d) Visually check the spark plug for thread damage and insu-
lator damage.
If abnormal, replace the spark plug.
Recommended spark plug:
DENSOPK20R11
NGKBKR6EP−11
(e) Inspect the electrode gaps.
Maximum electrode gap for used spark plug:
1.3 mm (0.051 in.)
If the gap is greater than maximum, replace the spark plug.
Correct electrode gap for new spark plug:
1.1 mm (0.043 in.)
NOTICE:
If adjusting the gap of a new spark plug, bend only the base
of the ground electrode. Do not touch the tip. Never attempt
to adjust the gap on the used plug.
(f) Clean the spark plugs.
If the electrode has traces of wet carbon, allow it to dry and then
clean with a spark plug cleaner.
Air pressure: Below 588 kPa (6 kgf/cm
2, 85 psi)
Duration: 20 seconds or less
HINT:
If there are traces of oil, remove it with gasoline before using the
spark plug cleaner.
(g) Using a 16 mm plug wrench, install the 4 spark plugs.
Torque: 18 N·m (180 kgf·cm, 13 ft·lbf)
(h) Reconnect the high−tension cords from the spark plugs.
4. INSPECT IGNITION COILS
(a) Disconnect the ignition coil connector.
(b) Disconnect the high−tension cord from ignition coil.
(c) Inspect the primary coil resistance.
Using an ohmmeter, measure the resistance between the
positive (+) and negative (−) terminals.
Primary coil resistance:
Cold0.36 − 0.55 Ω
Hot0.45 − 0.65 Ω
If the resistance is not as specified, replace the ignition coil.

IG0J5−02
− IGNITIONDISTRIBUTOR
IG−9
1996 RAV4 (RM447U)
REMOVAL
1. REMOVE AIR CLEANER CAP ASSEMBLY (See page ST−4)
2. DISCONNECT DISTRIBUTOR CONNECTOR
3. DISCONNECT HIGH−TENSION CORD FROM IGNITION COIL
4. DISCONNECT HIGH−TENSION CORDS FROM SPARK PLUGS
NOTICE:
Pulling on or bending the cords may damage the conductor inside.
5. REMOVE DISTRIBUTOR
(a) Remove the hold−down bolt, and pull out the distributor.
(b) Remove the O−ring from the distributor housing.

IG0J9−01
B11573
B11574
− IGNITIONDISTRIBUTOR
IG−13
1996 RAV4 (RM447U)
INSTALLATION
1. SET NO. 1 CYLINDER TO DTC/COMPRESSION
Turn the crankshaft clockwise, and position the slit of the intake
camshaft as shown in the illustration.
2. INSTALL DISTRIBUTOR
(a) Install a new O−ring to the housing.
(b) Apply a light coat of engine oil on the O−ring.
(c) Align the cutout of the coupling with the line of the hous-
ing.
(d) Insert the distributor, aligning the center of the flange with
that of bolt hole on the cylinder head.
(e) Tighten the hold−down bolt.
Torque: 19 N·m (195 kgf·cm, 14 ft·lbf)
3. CONNECT HIGH−TENSION CORDS TO SPARK
PLUGS
Firing order:
1 − 3 − 4 − 2
4. CONNECT HIGH−TENSION CORD TO IGNITION COIL
5. CONNECT DISTRIBUTOR CONNECTOR
6. INSTALL AIR CLEANER CAP ASSEMBLY