Page 185 of 346
, ENGINE ,MECHANICAL ‘& EriZjinb T.ufi&up $&p&a
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_ 69,
7.
8. . RACE ENGINE AT 2,500 RPM APPROX. 2 MINUTES.,
IkRT TESTING PROBE OF HCKO METER INTO TAIL
PIPE AT a0 cm (1.3 ftt)
MEAS,URE HC/CO CONCENTRATION AT IDLE
Wait $t lest one minute before measuring to allow the
concentration to stabilize.
Complete the measuring within -three minutes.
Idle CO concentration:
0 - 0.5 %
If the CO/HC concentration do& not conform to your
regulations, see the table in page EM-20 for possi,ble
cause+. I
Page 186 of 346
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/:
EM-24 ENGINE MECHANICAL - Engine Tune-up
INSPECTION’ AND ADJlJSTtiENT OF DASH
-- POT .(DP) SYSTEM
1. WARM UP ENGINE
2. CONNECT TACHOMETER TO ENGINE
(See page EM-171
3. CHECK IDLE SPEED
M-GE
IIP DiTphragm
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Ed
!M-GTE
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7
2)
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.
1
.
1
7lVi-GE
-
i
IM-GTE
/ rottle Valve
leased
alve ’
4. INSPECT AND ADJUST DP SETTING.SPEED
(a) Maintain the engine speed at 3,000 rpm.
(b) Pinch the vacuum hose between the DP and VTV.
.,
i
(c) Release the throttle valve.
(d) Check that the DP is set.
DP setting speed : 2,000 rpm
Page 187 of 346
‘.
.’
J’
ENGINE MECHANICAL.- Engine Tun&up
7M-GE
-.
7M-GTE
7M-GE
Release
FM-GTE
Approx. if not at specified speed, adjust with the. DP adjUitiri&
Screw. , 1
5,~ CHECK OPERATION OF VTV
(a) f:;;ye DP speed in the same ptocedure as above; (a)
(b) Release the pinched hose and check that the engine
returns to idle speed in approx. 1 second.
Page 188 of 346

EM-26 ENGINE MECHANICAL - Compression Check
d
COMPRESSION CHECK
NOTE: If there is lack of power, excessive oil consump-
tion or poor fuel mileage, measure the cylinder compres-
sion pressure.
(7M-GE)
1.
2.
3.
4.
5.
6. REMOVE SPARK PLUGS (See page IO-71
7.
EM3003
WARM UP ENGINE
DISCONNECT COLD START INJECTOR CONNECTOR
DISCONNECT SOLEtiOlD RESISTOR CONNECTOR
DISCONNECT DISTRIBUTOR CONNECTOR
REMOVE THROTTLE BODY
(a) Remove the PCV hose.
(b) Disconnect the water by-pass hoses and plug the
hose end.
(c) Disconnect following hoses:
. fwl EGR)
VSV hoses
. (wl TWC)
BVSV hoses
. (w/ EGR)
EGR vacuum modulator hoses
l No.7 air hose
id) Disconnect the throttle position sensor connector.
(e) Remove the throttle body bracket(s).
(f) Remove the four bolts, throttle body and gasket.
CHECK CYLINDER COMPRESSION PRESSURE
(a) Insert a compression gauge into the spark plug hole.
(b) While cranking the engine with the starter motor,
measure the compression pressure.
NOTE: Always use a
fully charged battery to obtain an
engine revolution of more than 250 rpm.
(c) Repeat steps Ia) through Ib) for each cylinder.
Compression pressure:
11.0 kg/cm2 (156 psi, 1,079 kPa) or more
Minimum pressure:
9.0 kg/cm2 (128 psi, 883 kPa)
Difference between each cylinder:
1 .O kg/cm2 (14 psi, 98 kPa) or less
(d) If cylinder compression in one or more cylinders is
low, pour a smali amount of engine oil into the
cylinder through the spark plug hole and repeat steps
(a) through (b) for the cylinder with low compression.
0 If adding oil helps the compression, chances are
that the piston rings and/or cylinder bore are worn
or damaged.
0 If pressure stays low, a valve may be sticking or
seating improperly, or there may be leakage past
the gasket.
Page 189 of 346
ENGINE MECHANICAL 1 Compression Ctwck
;
EMy27.
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. . . . . Ij,_
--.
(7M-GTE)
1. WARM UP ENGINE
2. DISCONNECT SOLENOID RESISTOR CONNECTOR
3. DISCONNECT CAM POSITION SENSOR CONNECTOR
’ ’
F5129,
4. REMOVE NO.1 AIR CLEANER HOSE
5. REMOVE PCV PIPE
‘1 6. REMOVE IGNITION COIL
(See steps 4, 5 on page EM-121
7. REMOVE SPARK PLUGS (See page IO-121 .
‘_
-.
8. CHECK CYLlNDER COMPRESSION PRESSURE
(See step 7 on page EM-261
Compression pressure:
10.0 kg/cm2 (142 psi, 981 kPa) or more
Minimum pressure:
.
9.0 kg/cm2 (128 psi, 883.kPa)
Difference between each cylinder:
1 .O kg/cm2 (14 psi, 98 kPa1 or less
Page 190 of 346
EM-28
ENGINE MECliANICAL - Titiingj Belt.
TIMING B’ELT
-.
COMPONENTS
No. 3 Timing Belt Cover Camshaft Timing Pulley
I I ImIng oen
I
Crankshaft Pulley
kg-cm (ft-lb, N-ml : Specified torque
EM30f 31
REMOVAL OF TIMING BELT
1.
REMOVE SPARK PLUGS
2. REMOVE WATER OUTLET
Remove the two bolts, water outlet and thermostat with
. gasket.
3. .(with A/C)
REMOVE A/C BELT
4. REMOVE FAN AND ALTERNATOR DRIVE BELT
5.
REMOVE PS BELT
Page 191 of 346
ENGINE MECHANICAL, k Timi’ng Belt-
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I 6. REMOVE NO.3 TIMING BELT COVER - ~ .-,.,.,.... ./. -~
/
Remove the five bolts, nut and No.3 timing belt’cover with:
the gasket. .,..,I
’ 7. SET NO.1 CYLINDER TO TDCICOMPRESSION
(a) Turn the crankshaft pulley and align its groove with
the “0” mark on the No.1 timing belt cover.
EM300d
(b) Check that the matchmarks on the camshaft timing
pulleys and No.2 timing belt cover are aligned.
If not, turn the crankshaft pulley one complete revolution.
8. REMOVE TIMING“BELT FROM CAMSHAFT TIMING -’
PULLEYS
NOTE.: If reusing the timingbelt, draw a direction arrow
on the bel’t (in direction of engine revolution).
(a) Loosen the idler pulley bolt and shift it left as far as it
will go with a screwdriver and wrench.
(b) Temporarily tighten the set bolt and then relieve the
timing belt tension.
(c) ,Remove the belt from the camshaft timing pulley.
. .
Page 192 of 346

EM-30 ENGINE MECHANICAL - Timing Belt
EM290t
9. NOTE:
l Support the belt so the meshing of the crankshaft tim-
ing pulley and timing belt does not shift.
0 Be careful”not to -drop anything inside the timing belt
cover.
0 Do not allow the- belt to come into contact with oil,
water and dust.
REMOVE CAMSHAFT TIMING PULLEYS
Using S.ST to hold the pulley, remove the pulley bolt, tim-
ing pulley and match pin.
SST 09278-54012
CAUTION: Do nqt make use of the timing belt ten-
sion when removing and installing the pulley set bolts.
10. REMOVE CRANKSHAFT PULLEY
(a) Using SST to hold the crankshaft pulley, loosen the
pulley bolt.
SST MA 09213-70010 and 09330-00021
MS 09213-54014 and 09330-00021
(b) Remove SST and’ pulley bolt.
(cl Using SST, remove the pulley.
SST 09213-31021
11. REMOVE PS AIR PIPE
12. REMOVE NO.1 TIMING BELT COVER
(with A/C)
Remove the nine bolts, nut, A/C idler pulley bracket, com-
pressor bracket and No.1 timing belt cover.
(without A/C)
Remove the six bolts, No.1 timing belt cover.
13. REMOVE TIMING BELT
14. REMOVE IDLER PULLEY AND TENSION SPRING