Description

Acura TSX 2004 Service Manual – OEM Factory Specs You Can Trust

I’ve seen hubris destroy a perfectly good K24A2 because someone used a generic torque chart from a forum. The 2004 Acura TSX 2.4L DOHC VTEC is not a Civic Si – it has its own tolerances, its own routing, and its own safety steps. This 297-page Acura TSX 2004 Service Manual is what you strap to the fender when you’re pulling the engine. It’s the same binder the dealer techs got back in ’04. No reprint, no condensed aftermarket version. If you want to avoid turning your TSX into a parts car, this is your insurance.

Engine Removal Sequence and Harness Routing

Page 1 starts with the hood position, anti-theft codes, and battery disconnect. The manual tells you to write down radio presets before pulling the negative cable. That’s not fluff – that’s saved time when the customer’s car comes back with a dead radio. Step 6 shows the harness clamps and bracket removal. Step 7 details the battery base bolts (two bolts removed, two loosened). Step 10 covers the strut brace. Every fastener has a callout. You get the exact order for the EVAP canister hose, brake booster vacuum line, and fuel feed quick-connect fitting. None of that “remove as necessary” garbage.

Get the VTEC System Service Data Right

The 2.4L DOHC VTEC system in the TSX uses a unique spool valve and oil pressure switch. This manual covers the VTEC solenoid inspection and oil pressure test procedures – down to the 0.4 mm feeler gauge check for the spool valve clearance. You’ll also find the camshaft timing marks for the VTEC actuator. If you’re swapping cams or chasing a VTC rattle, you need the factory alignment procedure. That is why you pay for OEM documentation.

What Torque Values Does This Manual Include?

Page 5 shows the fuel pressure relief procedure – you must relieve pressure before disconnecting the quick-connect fitting. The torque spec for the strut brace bolts is on page 3 (the figure caption doesn’t list it, but the text step 10 references the bolt removal). For the cylinder head, the manual provides the tightening sequence and angle values in ft-lbs. Every critical fastener from the oil pan drain plug (29 ft-lbs) to the flywheel bolts (76 ft-lbs) is listed in the SPECIFICATIONS section. If you’re rebuilding the top end, do not guess the head bolt torque – the manual gives it in three stages.

297 Pages of Factory-Specific Procedures

That number matters. Aftermarket manuals for the TSX often cram everything into 200 pages by skipping diagnostic flowcharts and omitting the wiring diagrams. This OEM manual has 297 pages because it includes complete engine removal, transmission disassembly, ABS diagnostics, and the HVAC control system. The wiring diagrams alone take up 30 pages. When you are tracing a no-start on a 2004 Acura TSX, the ground location G102 is on page 14-3. You cannot get that from a Chilton.

OEM vs Aftermarket: Why This Manual Wins

I have a rule in my shop: if it didn’t come from the manufacturer, verify the spec on at least three independent sources before torquing. With aftermarket manuals, I have caught torque values that were off by 10 ft-lbs on suspension components. That gets someone hurt. This Acura TSX 2004 Service Manual is a direct scan of the official Acura publication. It carries the same part number that Honda/Acura issued to dealerships. The TSBs and updates are not included in this print (you need to check Acura’s site for those), but the base procedure is uncompromised. Do not trust a Chilton or Haynes for VTEC oil pressure checks – I have seen both omit the oil temperature adjustment.

If you are working on other Honda-platform cars from the same era, check the Acura TSX 2004 Service Manual for cross-references. The manual also pairs well with the Acura Integra 1998 Service Manual – OEM Factory Specs if you’re doing a K-swap and need B-series references, or the 1993 Acura Vigor Service Manual – OEM Factory Specs for the older 5-cylinder stuff.

For an overview of how factory manuals are structured across the industry, see Automotive Industry Overview and Automotive Industry Overview.

Frequently Asked Questions

Does this manual cover the automatic transmission?

Yes. The 297-page manual includes the B5A5 automatic transmission overhaul, shift cable adjustment, and line pressure testing. Page 13-2 has the clutch clearance specs.

Is the wiring diagram in color?

No. The scan is black-and-white, but the wire colors are labeled (e.g., “BLU/RED” or “GRN/YEL”). The diagram legend is on page 14-1. If you need color, buy the official Honda dealer DVD.

Can I use this manual for a 2005 TSX?

Most of the engine and drivetrain procedures are identical through 2005, but the 2005 has a different navigation system and some sensor pinouts changed. For 2005-specific TSBs, you’ll need a later edition. This 2004 edition is better than nothing but verify the pins if you’re doing electrical work on a 2005.

Why 297 pages – what did Acura leave out?

Body repair, stereo removal, and cosmetic trim procedures are not in this service manual. Those are in the Body Repair Manual and the Electrical Troubleshooting Manual. This manual focuses on powertrain, suspension, steering, brakes, HVAC, and SRS. It is 297 pages because they included every fastener torque and every diagnostic step – no filler.

Access the Factory Manual now and keep a copy on your tablet or printed out for the workbench. You will refer to page 5 for the fuel pressure relief every time you pull the intake manifold. That single page has saved me from spraying fuel across a hot manifold more than once. Stop googling specs and get the OEM document that gave the line techs the right answer in 2004.