2004 IMPREZA SERVICE MANUAL - ENGINE SECTION 2 - ME(H4DOTC) - Mechanical

Oct 23, 2026

2004 IMPREZA service manual quick reference index provides Subaru service personnel guidance for correct maintenance and repair procedures. It covers maintenance operations, component disassembling and reassembling, inspection and adjustment, and diagnostic support for experienced mechanics. The index specifies engine subcategories including fuel injection, emission control, intake, mechanical systems, exhaust, cooling, lubrication, speed control, ignition, starting/charging, and engine diagnostics. It includes a detailed mechanical section covering topics such as general description, compression, idle speed, ignition timing, and crankshaft-related procedures, with cautions, part numbers, tightening torques, and installation/removal steps.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages61

Reading Time2 h 34 min

AccessFree to download

ME(H4DOTC)

1. General Description

2. Compression

3 . Idle Speed

4. Ignition Timing

5. Intake Manifold Vacuum

6. Engine Oil Pressure

7. Fuel Pressure

8. Valve Clearance

9. Engine Assembly

10. Engine Mounting

11. Preparation for Overhaul

12 . V-belt

13. Crankshaft Pulley

14. Timing Belt Cover

15. Timing Belt Assembly

16. Camshaft Sprocket

17. Crankshaft Sprocket

18 . Camshaft

19. Cylinder Head Assembly

20. Cylinder Block

21. Intake and Exhaust Valve

22 . Piston

23. Connecting Rod

24. Crankshaft

25. Engine Trouble in General

26. Engine Noise

2004 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX | ENGINE SECTION 2
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, reassembling, inspection and adjustment of components and diagnostics for guidance 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 specifications contained in this manual are based on the latest product information available at the time of publication approval.
FUJI HEAVY INDUSTRIES LTD. | | | | | --- | --- | --- | --- | | | | FUEL INJECTION (FUEL SYSTEMS) FU(H4DOTC) | | | | | | | | | | EMISSION CONTROL
(AUX. EMISSION CONTROL DEVICES) | EC(H4DOTC) | | | | | | | | | INTAKE (INDUCTION) IN(H4DOTC) | | | | | | | | | | MECHANICAL ME(H4DOTC) | | | | | | | | | | EXHAUST EX(H4DOTC) | | | | | | | | | | COOLING CO(H4DOTC) | | | | | | | | | | LUBRICATION LU(H4DOTC) | | | | | | | | | | SPEED CONTROL SYSTEMS SP(H4DOTC) | | | | | | | | | | IGNITION IG(H4DOTC) | | | | | | | | | | STARTING/CHARGING SYSTEMS SC(H4DOTC) | | | | | | | | | | ENGINE (DIAGNOSTICS) EN(H4DOTC)(diag) | | | | G1870GE3 | | | | | | | | MECHANICAL ME(H4DOTC) Page 1. General Description ....................................................................................2 2. Compression .............................................................................................34 3 . Idle Speed .................................................................................................35 4. Ignition Timing...........................................................................................36 5. Intake Manifold Vacuum............................................................................37 6. Engine Oil Pressure ..................................................................................38 7. Fuel Pressure............................................................................................39 8. Valve Clearance........................................................................................40 9. Engine Assembly ......................................................................................44 10. Engine Mounting .......................................................................................52 11. Preparation for Overhaul...........................................................................53 12 . V-belt.........................................................................................................54 13. Crankshaft Pulley ......................................................................................56 14. Timing Belt Cover......................................................................................57 15. Timing Belt Assembly................................................................................58 16. Camshaft Sprocket....................................................................................66 17. Crankshaft Sprocket..................................................................................68 18 . Camshaft...................................................................................................69 19. Cylinder Head Assembly...........................................................................78 20. Cylinder Block ...........................................................................................85 21. Intake and Exhaust Valve .......................................................................105 22 . Piston .....................................

FAQs

What procedures does the manual support for maintenance and repair?

It provides procedures for maintenance, disassembling/reassembling, inspection and adjustment, and diagnostics to guide experienced mechanics in correct repair work.

How is the crankshaft pulley removed in ME(H4DOTC) section 2?

Remove the V-belt, then remove the crankshaft pulley bolt while locking the crankshaft using the specified ST tools, and finally remove the crankshaft pulley.

What checks and replacement actions are required during crankshaft pulley installation?

Clean the pulley thread and bolt seat, apply engine oil, tighten temporarily, then tighten to the specified torque. Confirm the tightening angle is 45 degrees or more; if less than 45 degrees, replace damaged bolts and clean the crankshaft thread.

Oct 23, 2026

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