Toyota Corolla 2004 Repair Manual - ENGINE ASSEMBLY
–ENGINE MECHANICAL ENGINE ASSEMBLY
ENGINE ASSEMBLY
INSPECTION
1. INSPECT COOLANT (See page 16–1 )
2. INSPECT ENGINE OIL (See page 17–1)
3. INSPECT BATTERY (See page 19–13)
4. INSPECT AIR CLEANER FILTER ELEMENT SUB–ASSY
5. INSPECT SPARK PLUG (See page 18–2)
6. INSPECT FAN AND GENERATOR V BELT
HINT:
You don’t need to check the belt deflection because auto tensioner is adopted.
7. INSPECT IGNITION TIMING
(a) Warm up engine.
(b) When using hand–held tester or OBDII scan tool.
(1) Connect the hand–held tester or OBDII scan tool to
the DLC3.
HINT:
Please refer to the hand–held tester or OBDII scan tool operator’s manual for further details.
14–1
140OC–03
TC
CG
A62199
A64072
(c) When not using hand–held tester or OBDII scan tool.
(1) Using SST, connect terminal 13 (TC) and 4 (CG) of
the DLC3.
SST 09843–18040
NOTICE:
Be sure not to connect incorrectly. It causes breakage
of the engine.
Turn OFF all electrical systems.
Operate the inspection when the cooling fan motor is
turned OFF
(2) Remove the 2 nuts, 2 clips and cylinder head cover.
(3) Pull out the wire harness as shown in the illustration.
(4) Connect the clip of the timing light to the engine.
NOTICE:
Use a timing light which can detect the first signal.
After checking, be sure to tape the wire harness.
(5) Inspect ignition timing at idle.
Ignition timing: 8 – 12BTDC
NOTICE:
When checking the ignition timing, the transmission is at
neutral position.
HINT:
After engine rpm is kept at 1,000 – 1,300 rpm for 5 seconds,
check that it returns idle speed.
2004 COROLLA (RM1037U)
1011Author: Date:
14–2
–ENGINE MECHANICAL ENGINE ASSEMBLY
(6) Disconnect the terminal 13 (TC) and 4 (CG) of the
DLC3.
(7) Inspect ignition timing at idle.
Ignition timing: 10 – 18 BTDC
(8) Confirm that ignition timing moves to advanced
angle side when the engine rpm is increased.
(9) Remove the timing light.
(10) Install cylinder head cover No.2 with the 2 nuts and
2 clips.
Torque: 7.0 N⋅m (71 kgf⋅cm, 62 in.⋅lbf)
8. INSPECT ENGINE IDLE SPEED
(a) Warm up engine.
(b) When using hand–held tester or OBDII scan tool.
(1) Connect the hand–held tester or OBDII scan tool to the DLC3.
HINT:
Please refer to the hand – held tester or OBDII scan tool operator’s manual for further details.
(c) Check the idle speed.
Idle speed: 650 – 750 rpm
NOTICE:
Check idle speed with cooling fan OFF.
Switch off all accessories and air conditioning.
A01037
9. INSPECT COMPRESSION
(a) Warm up and stop engine.
(b) Remove ignition coil.
(c) Remove spark plugs.
(d) Inspect cylinder compression pressure.
SST 09992–00500
(1) Insert a compression gauge into the spark plug
hole.
(2) Fully open the throttle.
(3) While cranking the engine, measure the compres-
sion pressure.
Compression pressure
1,300 kPa (13.3 kgf⋅cm
Minimum pressure: 1,000 kPa (10.2 kgf⋅cm
2
, 189 psi)
2
, 145 psi)
Difference between each cylinder:
2
100 kPa (1.0 kgf⋅cm
, 15 psi)
NOTICE:
Always use a fully charged battery to obtain engine
speed of 250 rpm or more.
Check other cylinder ’s compression pressure in the
same way.
This measurement must be done in as short a time as
possible.
2004 COROLLA (RM1037U)
1012Author: Date:
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