Description

Nissan 240SX 1989 Service Manual

I’ve been turning wrenches for 28 years, ASE Master since ’96. In that time I’ve seen more aftermarket manuals turn a two-hour job into a two-day headache than I care to count. When a 240SX rolls into my bay with a blown head gasket or a no-start condition, I don’t reach for a Chilton or a Haynes. I grab the Nissan 240SX 1989 Service Manual – the original factory binder that came off the same printer Nissan used in Tokyo. 964 pages of procedures written by the engineers who designed the S13 chassis. No translation errors, no generic wiring colors, no torque specs pulled from thin air. This is what you need if you intend to keep that KA24E running right.

What You Get: 964 Pages of Factory Procedure

This manual covers the 1990 model year 240SX (S13 series) but was printed in 1989, so it’s the reference for all early S13 chassis. Every major system is broken out in its own section. You get the full QUICK REFERENCE INDEX on page 1, then separate chapters for ENGINE MECHANICAL, ENGINE LUBRICATION & COOLING SYSTEMS, ENGINE FUEL & EMISSION CONTROL, CLUTCH, MANUAL TRANSMISSION, AUTOMATIC TRANSMISSION, PROPELLER SHAFT & DIFFERENTIAL CARRIER, FRONT AXLE & SUSPENSION, REAR AXLE & SUSPENSION, BRAKE SYSTEM, STEERING, BODY, HEATER & AIR CONDITIONER, and ELECTRICAL. That’s fourteen major sections plus the GENERAL INFORMATION and MAINTENANCE sections. Each one carries the same density of detail you’d expect from a dealership shop manual.

Does This Manual Cover the KA24E Engine?

Yes. The KA24E is the sole engine for this chassis, and the ENGINE MECHANICAL section (EM) runs through every bolt, every seal, every timing chain guide. Need the valve clearance spec? It’s in there. Cylinder head bolt torque sequence and angle? Page EM-25 (the page numbers in the PDF match the corner stamps). The manual also includes the ENGINE LUBRICATION & COOLING SYSTEMS (LC) and ENGINE FUEL & EMISSION CONTROL (EF & EC) sections, so you get the full fuel injection diagnostics and emission system flow charts. If you’re swapping a KA24DE or building a high-compression KA, start here.

Torque Specs and Wiring Diagrams: No Room for Guesswork

The GENERAL INFORMATION section (GI) opens with “PRECAUTIONS” on GI-2 that reminds you of the obvious stuff like venting exhaust and chocking wheels – obviously important even if you’ve done it a hundred times. Then GI-20 gives you the tightening torque for standard bolts. That table alone has saved me from snapping off bellhousing bolts more than once. The wiring diagrams in the ELECTRICAL section (EL) are actual Nissan schematics with color codes that match the harness. Aftermarket diagrams swap pin positions or use generic labels. These don’t. You want to trace the injector pulse? Start at the ECU pinout, follow the wire gauge and color to the injector connector. No guesswork.

Stick with OEM Documentation for This Chassis

Aftermarket manuals for the 240SX are notorious for getting the front suspension torque specs wrong. I’ve seen a control arm bolt spec listed at 60 ft-lbs when factory calls for 87 ft-lbs. That’s how you end up with a ball joint separating at 70 mph. Nissan’s own SERVICE MANUAL is the only source for verified numbers. The copyright line on page 2 says “Not to be reproduced in whole or in part without the prior written permission of Nissan Motor Co., Ltd.” This is a direct scan of the original binder, not a re-typeset copy that introduces errors. If you’re serious about this chassis, you buy the OEM document.

3 Systems That Bite You If You Skip the Manual

• FRONT AXLE & FRONT SUSPENSION (FA) – The strut-to-spindle bolt torque and the tension rod bushing preload are specific. Get them wrong and the alignment won’t hold.
• BRAKE SYSTEM (BR) – The ABS diagnostics flow chart is buried in this section (page BR-15). Aftermarket manuals skip the sequence entirely. You need the factory procedure to cycle the actuator.
• ELECTRICAL (EL) – The combination switch wiring for the headlights and wipers is a mess on aftermarket diagrams. The factory schematic shows the exact pin logic. Use it before you start probing with a test light.

Related manuals you should consider if you’re building a collection: NISSAN 240SX 1989 Service Manual – Section: Generalinformation (the same manual with additional note pages), Nissan 240SX 1992 Service Manual Supplement – OEM Factory Specs for later S13 changes, and Nissan Xterra 2005 Service Manual – OEM Factory Spec if you work on other Nissan platforms. For a broader look at automotive documentation standards, you can read the Automotive Industry Overview and Automotive Industry Overview.

Frequently Asked Questions

Will this manual help me swap a KA24DE into my S13?

Yes. The engine mechanical section covers the KA24E block and head. The KA24DE shares the same short block architecture and torque specs for main bearings, rod bolts, and cylinder head. You’ll need the 1991–94 FSM for the DE-specific intake and VTC system, but this manual gives you the foundation.

Is the PDF searchable?

Yes, the 964-page PDF includes OCR text, so you can search for any term like “oil pump” or “torque converter”.

Stop chasing bad torque specs and guessing at wiring pinouts. Access the Factory Manual and put the original Nissan documentation on your shop tablet. It will pay for itself the first time you avoid a blown head gasket from incorrect bolt stretch.