1977 Datsun 280Z Service Manual
Wiring diagrams, specifications, and repair sequences for the Datsun 280Z - covers engine lubrication, cooling, fuel, emission, and electrical systems. Part Number: 77_datsun_280z.pdf
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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
Build 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)
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Inside the 1977 Datsun 280Z Service Manual
- Built for owners and professional workshops servicing the 1977 Datsun 280Z S30 Series, including both 2-seater and 2+2-seater configurations with the L28 engine
- Original OEM publication, printed in Japan, dated 1976 and intended for authorized Nissan/Datsun dealers
- Contains 77 detailed engine exploded-view diagrams, comprehensive electronic fuel injection wiring schematics, and multi-stage cylinder head tightening torque tables
- File is accessible from your device as soon as the order is placed
- Suitable for printing individual sections for shop-floor use
- This factory edition provides the primary technical specifications for the L28 engine and fuel injection system diagnostics utilized for the 1977 model year release
Mechanical and Electrical System Walkthrough
The 1977 Datsun 280Z service manual provides detailed information regarding the S30 series platform, covering the L28 engine mechanical components, fuel system, and cooling architecture. Major sections document assembly and disassembly procedures for the overhead camshaft engine, including cylinder head surfacing limits, crankshaft bearing clearances, and valve train adjustments. Separate chapters focus on the Bosch-licensed L-Jetronic fuel injection system, detailing sensor inputs, cold start valve operation, and electronic control unit signal processing for California and non-California variants.
The document includes extensive service data and troubleshooting matrices for common issues such as ignition timing, compression pressure, and fuel mixture ratios. Electrical integration is detailed through diagrams covering the EFI harness, ignition system, and engine sensors. Cooling system maintenance sections outline radiator pressure testing, thermostat inspection, and fan coupling characteristics specific to the 2.7-liter powertrain.
Specification and Reference Data
Compression pressure for the L28 engine is documented between 11.5 and 12.5 kg/cm² (164 to 178 psi) in the mechanical specification table. Coolant system capacity is specified at 10.3 liters for the manual transmission model. The intake valve clearance for a cold engine is listed at 0.20 mm in the valve mechanism section. An official 1977 Datsun 280Z OEM service manual covering the S30 series, documenting L28 engine mechanical, electrical, and electronic fuel injection systems for 2-seater and 2+2-seater models.
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