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Subaru IMPREZA 2004 Service Manual
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Subaru IMPREZA 2004 Service Manual

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2004 IMPREZA SERVICE MANUAL

ENGINE SECTION 1

This service manual has been prepared
to provide SUBARU service personnel
with the necessary information and data
for the correct maintenance and repair
of SUBARU vehicles.
This manual includes the procedures
for maintenance, disassembling, reas-
sembling, inspection and adjustment of
components and diagnostics for guid-
ance of experienced mechanics.
Please peruse and utilize this manual
fully to ensure complete repair work for
satisfying our customers by keeping
their vehicle in optimum condition.
When replacement of parts during
repair work is needed, be sure to use
SUBARU genuine parts.
All information, illustration and specifi-
cations contained in this manual are
based on the latest product information
available at the time of publication
approval.
FUJI HEAVY INDUSTRIES LTD.
QUICK REFERENCE INDEX
FUEL INJECTION (FUEL SYSTEMS)
EMISSION CONTROL
(AUX. EMISSION CONTROL DEVICES)
INTAKE (INDUCTION)
MECHANICAL
EXHAUST
COOLING
LUBRICATION
SPEED CONTROL SYSTEMS
IGNITION
STARTING/CHARGING SYSTEMS
ENGINE (DIAGNOSTICS)
FUEL INJECTION (FUEL SYSTEMS)
EMISSION CONTROL
(AUX. EMISSION CONTROL DEVICES)
INTAKE (INDUCTION)
MECHANICAL
EXHAUST
COOLING
FU(H4SO)
EC(H4SO)
IN(H4SO)
ME(H4SO)
EX(H4SO)
CO(H4SO)
LU(H4SO)
SP(H4SO)
IG(H4SO)
SC(H4SO)
EN(H4SO)(diag)
FU(H4SOw/oOBD)
EC(H4SOw/oOBD)
IN(H4SOw/oOBD)
ME(H4SOw/oOBD)
EX(H4SOw/oOBD)
CO(H4SOw/oOBD)
G1870GE2

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Summary of Contents for Subaru IMPREZA 2004

  • Page 1: Engine Section

    EC(H4SO) (AUX. EMISSION CONTROL DEVICES) INTAKE (INDUCTION) IN(H4SO) MECHANICAL ME(H4SO) This service manual has been prepared to provide SUBARU service personnel EXHAUST EX(H4SO) with the necessary information and data for the correct maintenance and repair of SUBARU vehicles. COOLING CO(H4SO)
  • Page 2 2004 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX ENGINE SECTION 1 LUBRICATION LU(H4SOw/oOBD) SPEED CONTROL SYSTEMS SP(H4SOw/oOBD) IGNITION IG(H4SOw/oOBD) STARTING/CHARGING SYSTEMS SC(H4SOw/oOBD) EN(H4SOw/oOBD) ENGINE (DIAGNOSTICS) (diag) G1870GE2...
  • Page 3 IGNITION IG(H4SO) Page General Description ..................2 Spark Plug....................5 Ignition Coil & Ignitor ASSY ................8 Spark Plug Cord..................10...

  • Page 4: General Description

    General Description IGNITION 1. General Description A: SPECIFICATIONS Item Designation 1.6 L CM12 — 100C Model 2.0 L FH0137 2.5 L 1.6 L HITACHI Manufacturer 2.0 L DIAMOND 2.5 L 0.7 Ω±10% Ignition coil & ignitor 1.6 L ASSY Primary coil resistance 2.0 L 0.73 Ω±10% 2.5 L...
  • Page 5 General Description IGNITION B: COMPONENT 1. 1.6 L MODEL IG-00016 (1) Spark plug (4) Spark plug cord (#2, #4) Tightening torque: N·m (kgf-m, ft-lb) (2) Spark plug cord (#1, #3) T1: 6.4 (0.65, 4.7) (3) Ignition coil & ignitor ASSY T2: 21 (2.1, 15.5) IG(H4SO)-3...
  • Page 6 General Description IGNITION 2. 2.0 L AND 2.5 L MODEL IG-00088 (1) Spark plug (4) Spark plug cord (#2, #4) Tightening torque: N·m (kgf-m, ft-lb) (2) Spark plug cord (#1, #3) T1: 6.4 (0.65, 4.7) (3) Ignition coil & ignitor ASSY T2: 21 (2.1, 15.5) C: CAUTION •...

  • Page 7: Spark Plug

    Spark Plug IGNITION 2. Spark Plug 4) Remove the spark plugs using spark plug sock- ets. A: REMOVAL CAUTION: All spark plugs installed on an engine, must be of the same heat range. Spark plug NGK: BKR6E* 1.6 L CHAMPION: RC8YC4** NGK: BKR6E-11** (Alternate) 2.0 L NGK: BKR6E*...
  • Page 8 Spark Plug IGNITION 5) Remove the spark plug cords by pulling the boot, C: INSPECTION not cord itself. Check the electrodes and inner and outer ceramic insulator of plugs, noting the type of deposits and the degree of electrode erosion. IG-00021 6) Remove the spark plugs with spark plug sock- IG-00023...
  • Page 9 Spark Plug IGNITION 3) Oil fouled: Spark plug gap: L Wet black deposits show excessive oil entrance With catalyst: into combustion chamber through worn rings and 1.0 — 1.1 mm (0.039 — 0.043 in) pistons or excessive clearance between valve Without catalyst: guides and stems.

  • Page 10: Ignition Coil & Ignitor Assy

    Ignition Coil & Ignitor ASSY IGNITION 3. Ignition Coil & Ignitor ASSY • 1.6 L MODEL A: REMOVAL 1) Disconnect the ground cable from battery. IG-00083 • 2.0 L and 2.5 L MODEL FU-00009 2) Disconnect the spark plug cords from ignition coil and ignitor ASSY.
  • Page 11 Ignition Coil & Ignitor ASSY IGNITION Specified resistance: (1.6 L model) [Secondary side] Between (A) and (B) 18.0 k Ω± Ω± 20% Ω± Ω± Between (C) and (D) 18.0 k Ω± Ω± Ω± 20% Ω± IG-00030 Specified resistance: (2.0 L and 2.5 L model) [Secondary side] Between (A) and (B) 12.8 k Ω±...

  • Page 12: Spark Plug Cord

    Spark Plug Cord IGNITION 4. Spark Plug Cord A: INSPECTION Check for: 1) Damage to cords, deformation, burning or rust formation of terminals 2) Resistance values of cords Resistance value: #1 cord: 6.1 — 10.5 k Ω Ω Ω Ω #2 cord: 8.0 —...