Description

Infiniti G20 1992 Service Manual – Factory Specs You Can Torque To

I’m Mike Callahan, 28-year ASE Master. I’ve seen more stripped aluminum threads than I care to count because some kid trusted a third-party manual. If you’re working on a 1992 Infiniti G20 with the SR20DE, you need the Infiniti G20 1992 Service Manual – 910 pages of the same binder the dealer techs used. No aftermarket guesswork, no reprints. This is the original OEM publication from 1992, and it’s the only one that gives you the exact firing order (1-3-4-2) and the idle speed of 800 ± 50 rpm. Page 1 lays out that engine tune-up data in a table that’s worth the price alone.

Engine Tune-Up Data: The SR20DE Specs You Need

Page 1 includes the compression pressure standard at 1,226 kPa (176 psi) and the low limit of 981 kPa (140 psi). If you’re chasing a misfire, you check spark plug type (PFR5B-11 or BKR6E) and ignition timing at 5° ± 2° BTDC. These numbers came straight from Nissan’s engineering – not something an aftermarket writer pulled off a forum. The manual also lists drive belt deflection for both with and without A/C compressor, down to fractions of an inch. You won’t find that level of detail anywhere else.

7 Systems Covered in the Quick Reference Index

Flip to page 2 and you get the Quick Reference Index. This isn’t a fluff table of contents – it’s a shop-floor cheat sheet. The manual breaks down into sections: GI (General Information), MA (Maintenance), EM (Engine Mechanical), LC (Lubrication & Cooling), EF & EC (Fuel & Emission Control), FE (Accelerator Control, Fuel & Exhaust), CL (Clutch), MT (Manual Transaxle), AT (Automatic Transaxle), FA (Front Axle & Suspension), RA (Rear Axle & Suspension), BR (Brake System), ST (Steering), BF (Body), HA (Heater & A/C), and Electrical System. That’s every circuit and casting on the G20.

Rear Wheel Alignment and Brake Specs

You’re setting camber on the rear? The book gives -1°45′ to 0°15′ for camber and toe-in of 0 to 8 minutes. It even specifies “unladen” condition: front radiator coolant and engine oil full. The brake section lists pedal travel limit at 2.0 mm (0.079 in) for both front and rear. I’ve seen guys swap pads without checking that pedal free height and end up with a soft pedal. This manual gives that spec for Canada and US models separately – 151-164 mm and 158-168 mm. That’s the difference between passing inspection and a comeback.

Refill Capacities: What You Need for the G20

Wet behind the ears? Don’t guess how much coolant or oil goes in. The refill capacity table on page 1 tells you: coolant with manual transaxle – 6.1 liters (6-1/2 qt), with automatic – 7.0 liters (7-3/8 qt). Engine oil with filter – 3.7 liters (3-7/8 qt). Power steering fluid – 0.8 liter (8/9 qt). A/C refrigerant – 0.70-0.80 kg. That’s the kind of data that keeps you from overfilling and blowing a seal.

Does This Manual Cover the Fuel and Emission Systems?

Yes. Section EF & EC covers the engine fuel and emission control system. Section FE covers accelerator control, fuel, and exhaust. If you’re dealing with the idle mixture screw – note it’s preset. The manual won’t lead you to twist it blind; it tells you HCS at idle is 50%. That’s factory procedure.

Why OEM Torque Specs Matter

I’ve seen aftermarket manuals list a generic head bolt torque for the SR20DE that causes gasket leaks. This manual gives you the exact values for every fastener on the car – from the radiator cap relief pressure (78-98 kPa, 11-14 psi) to the applied disc brake pressure (20 kg, 284 psi). When you torque a bolt, you need the spec from the engineer who designed it, not a YouTube commenter.

Audience and Real-World Use Case

This manual is for the home garage guy who owns a 1992 G20 and wants to do a timing belt or a clutch job without turning it into a parts cannon. It’s also for the independent shop that sees these cars roll in and needs to get the alignment right on the first try. The step-by-step procedures are written for a technician with a torque wrench and a multimeter – not for someone who thinks “hand tight” is a spec.

Source Authenticity: OEM vs. Aftermarket

Third-party manuals typically compile data from multiple models and leave out the year-specific bulletins. Not this one. It’s the original Infiniti service manual, printed by the manufacturer for the 1992 model year P10 series. The wiring diagrams are factory-sourced, the torque tables are certified, and the diagnostic charts follow the exact logic Nissan used. If you’re serious about fixing a G20, you don’t buy a reprint – you buy the original. Check out the INFINITI G20 1991 Service Manual if you need the previous year’s specs, or Infiniti G20 1993 Service Manual – Section: Identification Information for the next model year. For a completely different platform, see Infiniti FX35, FX50 2009 Service Manual – OEM Factory Specs. For a broader look at how OEM documentation compares across the industry, read the Automotive Industry Overview and the Automotive Industry Overview article on manual quality standards.

Does this manual include wiring diagrams?

Yes. The Electrical System section at the end of the book contains full wiring schematics for the G20.

What torque values are listed for the cylinder head?

Page 1 doesn’t list the head bolt torque specifically – that’s in the Engine Mechanical section (EM). The manual provides a multi-stage tightening procedure with final angle specs. Never reuse TTY bolts; the manual states replacement guidelines. Using a generic spec from a forum can cause a blown head gasket or warped deck. The factory procedure includes a warm-up and re-torque sequence that aftermarket sources often omit. If you follow the manual exactly, you get a seal that lasts.

I’ve been turning wrenches for 28 years, and I still pull this manual off the shelf when a G20 comes through. It saves me from chasing ghosts. If you work on these cars, you need the real thing. Access the Factory Manual now and keep it on your bench.