1977 Datsun 280Z Service Manual
681 Pages • 45.01 MB • Instant, Printable PDF
Nissan Models Covered & Key Technical Specifications
Models: 1977 Datsun 280Z (S30 Series)
Sub-models / Variants: 2-seater, 2+2-seater, California models, Non-California models, Manual Transmission, Automatic Transmission, Left hand drive
Model Years: 1977
Serial Numbers: HLS30-XXXXXX
Technical Data:
- Engine: L28, 6-cylinder in-line, O.H.C.
- Displacement: 2,753 cc (168.0 cu in)
- Compression ratio: 8.3:1
- Bore x Stroke: 86 x 79 mm (3.39 x 3.11 in)
- Fuel system: Electronic Fuel Injection (L-Jetronic type)
- Idle speed (Manual): 800 rpm
- Idle speed (Automatic): 700 rpm
- Valve clearance (Cold Intake/Exhaust): 0.20/0.25 mm (0.008/0.010 in)
- Valve clearance (Hot Intake/Exhaust): 0.25/0.30 mm (0.010/0.012 in)
- Cylinder head bolt torque (3rd turn): 7.0 to 8.5 kg-m (51 to 61 ft-lb)
Nissan Manual Features & Content Preview
- Original OEM publication (printed in Japan, dated 1976) for authorized Nissan/Datsun dealers servicing the S30 Series in both 2-seater and 2+2-seater configurations.
- Covers the 2.7-liter L28 engine, detailing mechanical, electrical, and electronic fuel injection systems.
- Features 77 engine exploded-view diagrams, complete EFI wiring schematics, and multi-stage cylinder head tightening torque tables.
- Provides essential technical reference data for diagnostic and repair work on the 1977 model year release.
Mechanical and Electrical System Walkthrough
Working on vintage Z-cars requires precise factory data to maintain vehicle performance and personal safety. Always consult professional safety protocols before lifting the vehicle or opening pressurized fuel systems. This manual breaks down the complete L28 engine architecture. You will find factory documentation on assembly and disassembly for the overhead camshaft engine, including exact limits for cylinder head surfacing, crankshaft bearing clearances, and valve train adjustments. Separate chapters dive into the Bosch-licensed L-Jetronic fuel injection system. The text details sensor inputs, cold start valve operation, and how the electronic control unit processes signals for both California and non-California variants.
Specification and Reference Data
Mechanics and DIY enthusiasts will appreciate the extensive troubleshooting matrices for diagnostic hurdles like ignition timing and fuel mixture ratios. The electrical section maps out the full EFI harness, ignition system, and engine sensors. For the cooling system, the manual outlines radiator pressure testing and fan coupling characteristics.
Factory reference data is clearly tabulated for quick shop reference. Compression pressure for the L28 engine should read between 11.5 and 12.5 kg/cm² (164 to 178 psi). The coolant system capacity is set at 10.3 liters for manual transmission models, and the intake valve clearance on a cold engine is 0.20 mm. Having these exact specifications readily available speeds up your repair process without relying on guesswork.
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