Datsun 280Z · 1975–1978 · S30 chassis

L28 Inline-Six
Breakdown & Repair

A shop-floor reference for tearing down and rebuilding the 2.8 L SOHC straight-six: interactive 3D models, factory-style specs, rebuild tolerances, bolt & wrench sizes, torque values and wiring diagrams in one place.

Explore the engine Torque specs

X-ray body (show engine) Auto-rotate Paint

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Verify before you wrench. Values here are compiled reference figures for the L28 / L28E as fitted to the 1975–78 280Z. Specs changed between model years, markets (federal vs. California) and transmissions. Always confirm against the Nissan Factory Service Manual (FSM) for your exact car and the emissions label under the hood.

Interactive L28 Engine

Click any component to see what it is, what fasteners hold it on and what to check. Use the explode slider to pull the engine apart in teardown order.

Click a part · drag to orbit

Engine Specifications

Core figures for the 280Z L28 with Bosch L-Jetronic fuel injection.

Rebuild Specifications

Clearances, tolerances and wear limits for machining and reassembly. Measure with a micrometer, bore gauge and Plastigage — and compare against the service limit column.

Show inches alongside mm

Bolt Sizes & Torque Specs

Thread size, wrench/socket size and torque for every fastener you'll touch on a teardown. Nissan uses fine 1.25 mm pitch on most M10 and M12 hardware — don't mix coarse-thread bolts in.

Cylinder Head Bolt Sequence

Tighten from the center outward in the order shown. Loosen in the reverse order (outside in). Head bolts take a 10 mm hex (Allen) socket.

Wrench Size Cheat Sheet

Wiring Diagrams

Simplified schematics of the engine-bay circuits. Wire colors use the Nissan code (e.g. B/W = black with white tracer). Hover a wire to highlight it.

Teardown & Reassembly Guide

Step-by-step order of operations. Tick steps off as you go — progress is saved in your browser.