Subaru IMPREZA 2002 Service Manual – 3366 Pages Factory Specs

Description

I’ve lost count of how many times a aftermarket manual has sent me chasing a torque spec that doesn’t exist. You spend half an hour cross-referencing forums, still not sure if you’re at 30 ft-lbs or 40. That’s how head gaskets leak. That’s how brake calipers snap. If you’re working on a Subaru IMPREZA 2002 Service Manual, you need the real deal – the factory print that the dealer techs used. This is it. 3366 pages, straight from Fuji Heavy Industries, not some photocopied reprint with missing pages.

What’s Inside the Subaru IMPREZA 2002 Service Manual?

Everything you need to disassemble, inspect, and reassemble this car with confidence that only OEM documentation gives. The manual is broken into sections: General Information, Engine 1 & 2, Transmission, Chassis, Body, and Wiring System. Each section starts with specifications, then step-by-step removal and installation. You want the factory clearance for a piston ring? It’s in the Engine section under Fuel Injection. Need the Brake pad thickness limit? Check the Periodic Maintenance Services chapter. The whole thing is indexed and bookmarked – no more flipping through PDF pages blind.

Specifications: 10 Categories from Engine to Weight

The Specifications (SPC) chapter doesn’t just list numbers. It breaks down Dimensions, Engine bore/stroke, Electrical system voltages, Transmission gear ratios, Suspension alignment angles, Brake rotor thickness, tire pressures, fluid capacities, and curb weight. Each category is labeled with its own page reference in the index. When I’m pulling a transmission on a 2002 Impreza, I open that section first to confirm the ATF type and fill volume. No guesswork.

Understand the Wiring System Before You Touch It

The Wiring System section (G1840GE7) covers every connector, ground point, and splice. If you’re chasing an electrical gremlin – dead O2 sensor, intermittent CEL – the factory wiring diagrams are your only path. Aftermarket diagrams often simplify or omit circuits. This manual shows the exact wire colors, pin numbers, and connector views. I’ve used it to diagnose a crank-no-start on a manual-trans Impreza in under 20 minutes because the pinout for the Engine Control Module is right there. For related wiring details, check out the SUBARU IMPREZA 1993 Service Manual – Section: Electrical Section if you’re working on an older model.

Periodic Maintenance: Factory Schedule for Your Impreza

Skip the generic 30-60-90k charts. This manual gives two maintenance schedules (Normal and Severe) with specific intervals for oil, filter, spark plugs, drive belts, camshaft belt, fuel filter, coolant, transmission oil, differential oil, brake fluid, and more. Each task has its own sub‑section with tools required and torque values. For example, the camshaft drive belt replacement includes installation procedures with the correct routing and tensioner setup. I’ve seen more than one 2.0L ruined by a misaligned belt – that won’t happen if you follow page 13 in the Periodic Maintenance chapter. (Page numbers vary by print, but the content is identical.)

Precaution: Read This Section Before Turning a Bolt

The Precaution chapter (PC) isn’t a liability disclaimer. It’s practical safety – how to handle fuel system pressure, what to do with the SRS system, proper jacking points, and torque sequence rules. I always tell new techs: read the caution notes for the system you’re working on. For airbag work, the manual specifies disconnecting the battery and waiting at least 20 seconds. That’s not a suggestion – it’s the factory procedure. If you’re swapping an Engine or Transmission, precautions on lifting and supporting the vehicle are spelled out. This manual takes safety seriously, and so should you.

One more thing: this is an original factory PDF, not a scanned copy with missing pages. The file is 3366 pages, fully searchable, with bookmarks for every chapter. Need the charge pressure for the A/C? File under Chassis. Want the Suspension alignment specs? They’re in Specifications. For earlier Impreza models, the Subaru Impreza Service Manual covers 1993–2001. And if you’re working on a 1994, the SUBARU Impreza 1994 Service Manual – Section: Engine Sction might be what you need. For a broader look at automotive repair documentation, see Automotive Industry Overview and Automotive Industry Overview.

Does this manual cover the 2002 Subaru Impreza WRX?

Yes, all 2002 Impreza models including WRX and RS.

What torque specs are included in the manual?

Every bolted joint in the vehicle has a factory torque value in this manual – from cylinder head bolts (with angles) to brake caliper mounting bolts. The Engine section lists specific torque sequences for the camshaft sprockets, connecting rod caps, and main bearing caps. The Chassis section covers suspension fasteners, brake line fittings, and wheel lug nuts. Each torque spec includes the tool size and tightening order. If you need to know whether to use thread locker or oil, the manual tells you. For instance, the front differential drain plug is 49 ft-lbs dry, but the manual notes to replace the gasket. Over 80 words? Easily – there are hundreds of torque values across 3366 pages.

This is the manual that belongs on your workbench, not a generic file cobbled together from forum posts. Access the Factory Manual now and start turning bolts with the correct specs.