1987 TOYOTA CELICA check engine

EM-8 ENGINE MECHANICAL -I Engine Tune-up
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lNS.PECTlON AND. ADJUSTMEtiT OF VALVE
CLEARANCE’
NOTE: Check and adjust the valve clearance while the
engine is cold.
1. REM?VE AIR INTAKE CONNECTOR
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(a) Remove the PCV pipe.
(b) (ex. MS RHD)
.Disconnect the accelerator connecting rod.
(c) Disconnect the water by-pass hoses from the throt-
tie body.
(d) Disconnect following hoses:
. (w/ EGR)
VSV hose(for EGR) .
l . (w/ TWC)
BVSV hose
. (w/ EGR)
EGR vacuum modulator hoses
0 No.7 air hose
(e) Disconnect the throttle position sensor connector.
(f) Remove the. throttle body bracket(s).
(g) Remove the air intake connector bracket mounting
bolts.
c J
I (h) Remove the four bolts, two nuts, air intake connect01
and gasket.
2. REMOVE CYLINDER HEAD COVERS
(See pages EM-59,601

ENGINE MECHANICAL - Engine Tune-up
3.
* MEA&E VALVE CLEARANCE I
4. (a) Set No.1 cylinder to TDC/compression.
l Turn the crankshaft pulley and align its groove
with the “0” mark on the No.1 timing belt cover,
l Check that the valve lifters on the No.1 cylinder
are loose and valve lifters on the No.6 cylinder are
tight.
If not, turn the crankshaft pulley one complete revolution.
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(b) Measure the clearance of No.1 (INI and No.4 (IN) and
No.1 (EX) and No.5 (EX) valves.
. . . .
l Measure only those valves indicated in the figure.,
0 Record the measurements which are. out of
specification. They will be used later to determine
the required reblacement shims.
Valve clearance (Cold) :
Intake 0.15 - 0.25 mm (0.0059 - 0.0098
Exhaust 0.20 - 0.30 mm (0.0079 - 0.0118
(c(c) Turn the crankshaft pulley 2/3 revolution (240”) and
measure the clearance of No.3 (IN) and No.5 (IN) and
No.3 (EX) and No.6 (EX) valves.
4 Check that the valve lifters on the No.3 cylinder
are loose.
0 Measure only those valves indicated in the figure.
l Record the measurements which are out of
specification. They will be used later to determine
the required replacement shims.
(d) Turn the crankshaft pulley 2/3 revolution ,(240°) and
measure the clearance of No.2 (IN) and No.6 (IN) and
No.2 (EX) and No.4 (EX) valves. : .-:1’.
0 Check that the valve lifters on the No.2 cyli i,:..?
are loose. c
.i
0 Measure only those valves indidated in the figure.
-I 0 Record the measurements which are out of
specification. They will be used later to determine
the required replacement shims.
ADJUST VALVE CLEARANCE .
(a) Remove the adjusting shim. ,
0 Turn the crankshaft.pulley to’ position the lobe on
the adjusting valve camshaft upward.
0 Using SST (A), press down the valve lifter and
place SST (B) between the camshaft and valve
lifter. Remove SST (A).
SST 09248-55010
NOTE: Before pressing down the valve lifter, position the
notch toward the spark plug.

EM-10 ._ ENGINE MECHANICAL - Engine Tune-up
EM053:
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EM4537
7. 5.
6.
l Remove the adjusting shim with a small
screwdriver and magnetic finger.
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(b) Determine the replacement shim size by using the
following (Formula or Chart).
i Using a mkxometer, measure the thickness of the
shim which was removed.
l Cal&late the thickness of the new shim so the
valve clearance comes within specified value.
T
. . . . . . *, Thickness of shim used
A . ...,,, * Valve clearance measured
N
. . . . . . . . Thickness of shim new
Intake N = T +-(A - 0.20 mm (0.0079 in.))
Exhaust N = T + (A - 0.25 mm (0.0098 in.))
l Select a new shim with a thickness as close as
possible to the calculated value.
NOTE: Shims are available in 17 sizes, in increments’of .,;.
0.050 mm (0.0020 in.), from 2.500 mm (0.0984 in.1 to
3.300 mm (0.1299 in.).
(cl Install a new adjusting shim.
l Place a new adjusting shim on the valve lifter.
l Using SST (A), press down the valve lifter and
remove SST (B).
c ,.
SST 09248-55010 :,y
RECHECK VALVE CLEARANCE
INSTALL CYLINDER HEAD COVERS
(See pages EM-59, 60)
INSTALL AIR INTAKE CONNECTQR
(a) Install a new gasket and air intake connector with the
four bolts and two nuts.
Torque : 180 kg-cm (13 ft-lb,. 18 N.m)
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F11868

ENGINE MECHANICAL &Engine Tune-up
EM-1 3
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6. REMOVE CYLlNDER HEAD cOVERS
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(a) Remove the accelerator link.
(b) Disconn.ect the No.3 PCV hose.
(c) Remove the cylinder. head covers.
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.7. MEASURE VALVE CLEARANCE
.~. :. 1See+tep 3 oti page EM-91 3
6: ‘ADJUST VALVE CLEARANCE
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ISee ,tep 4 on pages EML9, 10)
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I / ‘.. . . 9. RFCHECK’ VALVE CLEARANCE
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10. INSTALL CYLiNDER HEAD COVERS
(See pages EM-59,601 ,_ .:
, ,-‘G j i rl.1. IN&ALL.lGNITION COIL WITH BRACKET
< .‘. ,_ ..- ,, ,,C’
:,la) Install theNo. and No.2 high-tension cords to spark
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l$w. .
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$) &tall the ignition’coil withbracket and high-tension;.
cord. (Seepage I’C-,y 5)’ ;
(c) Install the No.‘l and No.2 high-tensioncords to igni-
tion coil and clamp. ,. ‘. “-. _
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(d) Install and torque the nut.
Torque : 55 Kg-cm (48 in..-lb, 5.4 Nnrn)
NOTE: Do not over tighten the nut.
(e) Connect the ground strap and connector.
12. INSTALL IGNITION COIL COVER
(a) Install the ignition coil cover with the five nuts.
fb) Install the oil filler cap.

ENGINE MECHANICAL. - Engine Tune-up
EM-?1 7.
INS’PECTIOlil ‘AhiD ADJUSTMENT O:F .-
IGNITION TIMING
1. VriARiiA. UP ENGINE.
Allow the engine to. reach normal operating temperature.
2.
CbNNECT TACHOMETER AND TIMING LIGHT TO
ENGINE
Connect the tachometer positive terminal to the check
connector terminal IG 0 .
CHECK CONNECTOR LOCATION: .,
s See pages FI-110, 111
CAUTION:
l Never allow the tachometer terminal to touch
ground as it could result in damage to the igniter
and/or ignition coil.
, 4% 3.
EC21 18
s As some tachometers are not compatible with this
ignition system, we recommend that you confirm
the compatibility of your unit before using.
NOTE (7M-GTE): Connect the timing light pickup to t
No.6 cylinder high-tension cord.
CHECK IGNITION TIMING
(a) Using a service wire, short terminals T(MA) or
TEI (MS) and El of the check connector.
CHEC,K CCNNECTOR LOCATION.:
See pages FI- 1’10, 111
(b) Check the idle. speed.
Idle speed: /-
7M-GE w/ TWC 700 rpm
w/o TWC 800 rpm
7M-GTE 800 rpm
(c) Using a timing light, check the ignition timing.
Ignition timing: IO” BTDC @ idle
[w/ short-circuited T (TEl) and El
and Transmission in “N” range]
c,
If necessary, loosen the distributor (7M-GE) or cam posz-’
tion sensor (7M-GTE) bolt and turn the distributor (cam
position sensor) to align the marks. Recheck the timing
- after tightening the distributor (cam position sensor).
Torque: 140 kg-cm (10 ft-lb, 14 N-m)
(cl) Unshort the check connector.

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EM-18 ENGINE MECHANICAL - Engine Tune-up
4. FURTHER CHECK IGNITION TIMING
Check that the ignition timing advances.
Ignition timing:
7M-GE ._ 10 -‘.13” BTDC @ idle
7M-GTE More than 12” BTDC @ idle
DISCONNECT TACHOMETER AND TIMING LIGHT
FROM ENGJNE

ENGINE MECHANICAL! Y) Engine Tune-up
Qy r\:y 9,.
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1. 1. ., I ,,.,q,, ./. . . .
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,; ..1’- -INSPECTION AND ADJUSTMENT OFIDLE
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$‘,’ ,, :.. ,:
MIXTURE (w/o TWC)
2,
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4.
5. tNSPECT AND ADJUST IDLE CO CONCENTRATION
120 Seconds Tachometer
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EC016
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A. INITIAL CONDITIONS
(a) Ajr cleaner Jnstalled
(b) Normal engine operating temberature
(cf All pipes and hoses of air intake system connected
(d) All accessories switched off
‘6) All vacuum lines properly connected
(f) EFI system~‘w&g connectors fully plugged
c(g) I.gnitio$ timing set correctly
(h) Transmission. i.n,.N range
CONNECT TACHCBMETER TO ENGINE
(See page EM-171
CHECK IDLE SPEED
Idle speed: 800 rpm
CAUTION:
a Always use a CO meter,.,when adjusting the idle mix-
ture. It is not necessary to adjust with the idle mix-
ture adjusting screw in. most vehicles if they are in
good condition. If a CO meter is not available, DO
NOT ATTEMPT TO ADJUST WITH THE SCREW.
l If a CO meter is not available and it is absolutely
necessary to adjust with the idle mixture adjusting
screw, or if the air flow meter is replaced, use the
alternative method.
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METHOD WITH CO METER
(a) Check that the CO meter is properly calibrated.
(b) Race the engine for approx. 120 seconds at appr 1,
2,500 rpm before measuring the concentration. r
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(c) Wait 1 - 3 minutes after racing the engine to allow
the concentration to stabilize.
(df Insert a testing probe at least 40 cm (1.3 ft) into the
tailpipe, and measure the concentration with a short
time.
Idle CO concentration: 1.0 -t- 0.5 %

EM-22 ENGINE MECHANICAL - Engine Tune-up
INSPECTION OF IDLE HC/CO
CONCENTRATION (w/ TWC)
NOTE: This check method is used only to determine
whether or not the idle HWCO complies with regulations.
1. INSTALL CONDITIONS
(a) Air cleaner installed
(b) Normal engine operating temperature
(c) All pipes and hoses of intake system connected
(d) All accessories switches off
(e) All vacuum lines properly connected
NOTE: All vacuum hoses for EGR system etc. should be
properly connected
(f) EFI system wiring connectors fully p!ugged
(g) Ignition timing set correctly ‘.
(h) Transmission in “N” range
6) Tachometer and HWCO meter at hand and calibrated
2. WARM UP ENGINE
Allow the engine to reach normal operating temperature.
3. CONNECT TACHOMETER TO ENGINE
(See page EM- 17)
w ‘I” FI16C
4. CHECK IDLE SPEED
Idle speed :
7M-GE 700 rpm
7M-GTE 800 rpm
5. CHECK OXYGEN SENSOR OPERATION
(a) Using a service wire, short terminals T and El’of the
check connector.
CHECK CONNECTOR LOCATION: See page FI-I 10
(b) Connect the positive (+I probe of a voltmeter to ter-
minal VF of the check connector, and negative (-1
probe to terminal E 1.
(c) Hold the engine speed at 2,500 rpm for approx. 2
minutes.
(d) Then, maintaining engine at 2,500 rpm, count how
many times needle of voltmeter fluctuates between 0
and 5 V.
Minimum needle fluctuation : ’
8 times for every 10 seconds
If the fluctuation is less than minimum, check the air
induction system for leakage, If necessary, see EFI
SYSTEM.