engine TOYOTA CAMRY V20 1986 Service Information

(e) Determine the replacement adjusting shim size by following
the Formula or Charts:
wUsing a micrometer, measure the thickness of the.
removed shim.
wCalculate the thickness of a new shim so that the.
valve clearance comes within specified value.
T .......... Thickness of used shim
A .......... Measured valve clearance
N .......... Thickness of new shim
Intake N = T + (A ± 0.18 mm (0.007 in.) )
Exhaust N = T + (A ± 0.32 mm (0.013 in.))
wSelect a new. shim with a thickness as close as possible to
the calculated values.
HINT: Shims are available in seventeen sizes of 0.05
mm (0.0020 in.), from 2.50 mm (0.0984 in.) to 3.30 mm
(0.1299 in.).
(f) Install a new adjusting shim.
wPlace a new adjusting shim on the valve lifter.
wPress down the valve lifter with SST (A), and remove SST
(B).
SST 09248±55010
(g) Recheck the valve clearance.
5. REINSTALL CYLINDER HEAD COVERS
(See step 8 on page EM±102)
6. REINSTALL AIR INTAKE CHAMBER
(See steps 18 to 40 pages FI±105 to 106) (d) Remove the adjusting shim.
wTurn the crankshaft to position the cam lobe of the
camshaft on the adjusting valve upward.
wPress down the valve lifter with SST (A), and place
SST (B) between the camshaft and valve lifter.
Remove SST (A).
SST 09248±55010
HINT: Before pressing down the valve lifter, position the
notch the spark plug.
wRemove the adjusting shim with a small screw-
driver and magnetic finger.
± ENGINE MECHANICALEngine Tune±UpEM±16

Intake valve clearance (Cold):
0.13 ± 0.23 mm (0.005 ± 0.009 in.)
EXAMPLE: The 2.800 mm (0.1102 in.) shim is installed
and the measured clearance is 0.450 mm (0.0177 in.).
Replace the 2.800 mm (0.1102 in.) shim with a No. 24
shim.
Adjusting Shim Selection Using Chart
INTAKE
Installed shim thickness (mm)
New shim thicknessMeasured
clearance
(mm)
ThicknessThicknessmm (in.)
Shim
No. Shim
N
± ENGINE MECHANICALEngine Tune±UpEM±17

Exhaust valve clearance:
0.27 ± 0.37 mm (0.011 ± 0.015 in.)
EXAMPLE: The 2.800 mm (0.1102 in.) shim is installed
and the measured clearance is 0.450 mm (0.0177 in.).
Replace the 2.800 mm (0.1102 in.) shim with a No. 18
shim.
Adjusting Shim Selection Using Chart
EXHAUST
Installed Shim thickness (mm)
New shim thickness Measured
clearance
(mm)
Thickness Thicknessmm (in.)
Shim
No. Shim
No.
± ENGINE MECHANICALEngine Tune±UpEM±18

ADJUSTMENT OF IGNITION TIMING
3S±FE (See steps 7 to 10 on pages IG±16 and 17)
2VZ±FE (See steps 6 to 11 on pages IG±20 and 21)
Ignition timing:
10°BTDC @ idle
(w/ Terminals TE1 and E1 connected)
ADJUSTMENT OF IDLE SPEED (3S±FE)
(See HINT on page FI±17)
1. INITIAL CONDITIONS
(a) Engine at normal operating temperature
(b) Air cleaner installed
(c) All pipes and hoses of air induction system connected
(d) All vacuum lines connected
HINT: All vacuum hoses for EGR systems, etc. should be
properly connected.
(e) EFI system wiring connectors fully plugged
(f) All accessories switched OFF
(g) Transmission in N range
2. CONNECT TACHOMETER (See page IG±16)
3. ADJUST IDLE SPEED
(a) Using SST, connect terminals TE1 and E1 of the check
connector.
SST 09845±18020
HINT: Decrease the rpm after the engine maintains a speed
of the 1,000 ± 1,300 rpm for 5 seconds.
(d) Remove SST.
4. FURTHER CHECK IDLE SPEED
Idle speed: 700
+ 5O rpm
If the idle speed is not within these values, carry out either of
the below listed procedures and then recheck the idle speed.
Carry out a driving test, including stop±go several times at a
speed above 10 km/h, or± start the engine, idle for
30 seconds and then turn the engine 'off repeatedly. By
doing this, idle data will be stored in the ISC and the idle rpm
will be at specified value.(b) Check the idle speed.
Idle speed: 660 rpm or more
(c) If the idle speed is not as specified, adjust the idle speed
by turning the IDLE SPEED ADJUSTING
SCREW.
± ENGINE MECHANICALEngine Tune±UpEM±19

IDLE AND OR 2,500 RPM HC CO
CONCENTRATION CHECK
METHOD
HINT: This check is used only to determine whether or not
the idle HC/CO complies with regulations.
1. INITIAL CONDITIONS
(b) Engine at normal operating temperature
(b) Air cleaner installed
(e) All pipes and hoses of air induction system connected
(d) All operating accessories switched OFF
(e) All vacuum lines properly connected
HINT: All vacuum hoses for EGR systems, etc. should be
properly connected.
(f) EFI system wiring connectors fully plugged
(g) Ignition timing set correctly
(h) Transmission in N range
(i) Tachometer and HC/CO meter calibrated and at hand
2. START ENGINE
3. RACE ENGINE AT 2,500 RPM FOR APPROX. 2
MINUTES
4. INSERT HC/CO METER TESTING PROBE INTO
TAILPIPE AT LEAST 40 cm (1.3 ft)
5. CHECK HC/CO CONCENTRATION AT IDLE
Complete the measuring within three times.
HINT: When performing the 2 mode (2,500 rpm and idle)
test, follow the measurement order prescribed by the regula-
tions.
If the HC/CO concentration at 2,500 rpm does not comply
with regulations, try the following procedure.
Race the engine again at 2,500 rpm for approx. 1 minute
and quickly repeat steps 4 and 5 above.
This may correct the problem.
± ENGINE MECHANICALIdle and or 2 500 rpm HC CO Concentration Check MethodEM±20

Troubleshooting
If the HC/CO concentration does not comply with regula-
tions, perform troubleshooting in the order given below.
(a) Check oxygen sensor operation.
(See page FI±129)
(b) See the table below for possible causes, and then inspect
and correct the applicable causes if necessary.
1. Faulty ignition:
wIncorrect timing
wFouled, shorted or improperly gapped plugs
wOpen or crossed high±tension cords
wCracked distributor cap
2. Incorrect valve clearance
3. Leaky EGR valve
4. Leaky intake and exhaust valves
5. Leaky cylinder
1. Restricted air filter
2. Faulty EFI system
wFaulty pressure regulator
wClogged fuel return line
wDefective water temp. sensor
wDefective air temp. sensor
wFaulty ECU
wFaulty injector
wFaulty cold start injector
wFaulty throttle position sensor
wAir flow meter 1. Vacuum leak:
wPCV hose
wEGR valve
wIntake manifold
wAir intake chamber
wThrottle body
wISC valve
wBrake booster line
2. Lean mixture causing misfire
Rough idle
(Black smoke from exhaust)Rough idle
(Fluctuating HC reading) Rough idleProblem
Normal
Cause
High
High
HighHigh
Low
± ENGINE MECHANICALIdle and or 2 500 rpm HC CO Concentration CheckMethod
EM±21

COMPRESSION CHECK
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 tempera-
ture.
2. DISCONNECT COLD START INJECTOR CONNECTOR
3. DISCONNECT DISTRIBUTOR CONNECTOR
4. REMOVE SPARK PLUGS (See page IG±6 or 11)
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 pres-
sure.
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 in as short a time
as possible.
Compression pressure:
12.5 kg±cm
2 (178 psi, 1,226 kPa) or more
Minimum pressure:
10.0 kg/cm
2 (142 psi, 981 kPa)
Difference between each cylinder:
1.0 kg/cm
2 (14 psi, 98 kPa) 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 (e) for cyl-
inders with low compression.
wIf adding oil helps the compression chances are that the pis-
ton rings and/or cylinder bore are worn or damaged.
wIf pressure stays low, a valve may be sticking or seating is im-
proper, or there may be leakage past the gasket.
6. REINSTALL SPARK PLUGS (See page IG±7 or 11)
Torque: 180 kg±cm 0 3 ft±Ib, 18 N±m)
7. RECONNECT DISTRIBUTOR CONNECTOR
8. RECONNECT COLD START INJECTOR CONNECTOR
± ENGINE MECHANICALCompression CheckEM±22

REMOVAL OF TIMING BELT
1. DISCONNECT CABLE FROM NEGATIVE TERMINAL
OF BATTERY
2. REMOVE RN FRONT WHEEL
3. REMOVE ENGINE RH UNDER COVER
4. REMOVE CRUISE CONTROL ACTUATOR
(See step 9 on page EM±108)
5. REMOVE DRIVE BELTS
6. REMOVE ALTERNATOR (See page CH±6)
7. REMOVE ALTERNATOR BRACKET
8. REMOVE RH MOUNTING STAY
(2WD)
Remove the three bolts and mounting stay.
TIMING BELT (3S±FE)
COMPONENTS
± ENGINE MECHANICALTiming Belt (3S±FE)EM±23

9. SLIGHTLY JACK UP ENGINE
.
Raise the engine enough to remove the weight from the en-
gine mounting on the right side.
10. REMOVE ENGINE RH MOUNTING INSULATOR AND
BRACKET
(a) (2WD)
Remove the four nuts, bolt and mounting insulator.
(b) (4WD)
Remove through bolt, two nuts and mounting insulator.
(c) Remove the three bolts and mounting bracket.
11. REMOVE SPARK PLUGS (See page IG±6)
13. SET NO.1 CYLINDER TO TDC/COMPRESSION
(a) Turn the crankshaft pulley and align its groove with the tim-
ing mark º0º of the No. 1 timing belt cover. (4WD)
Remove the bolt, nut, ground strap and mounting
stay.
12. REMOVE No.2 TIMING BELT COVER
Remove the five bolts, belt cover and gaskets.
± ENGINE MECHANICALTiming Belt (3S±FE)EM±24

(a) Loosen the mount bolt of the No. 1 idler pulley and shift
the pulley toward the left as far as it will go, tempo-
rarily tighten it.
(b) Remove the timing belt from the camshaft tinning
pulley. 14. REMOVE TIMING BELT FROM CAMSHAFT TIMING
PULLEY
HINT: If reusing the timing belt, place the matchmarks on
the timing belt and camshaft timing pulley.
15. REMOVE CAMSHAFT TIMING PULLEY
Using SST, remove the bolt, plate washer and pulley.
SST 09278±54012
16. REMOVE CRANKSHAFT PULLEY
(a) Using SST, remove the pulley mount bolt.
SST 09213±54015 (09214±00030) and 09330±00021 (b) Check that the hole of the camshaft timing pulley is aligned
with the alignment mark of the bearing cap.
If not, turn the crankshaft one revolution (360
°).
EM3334
± ENGINE MECHANICALTiming Belt (3S±FE)EM±25