1989 BMW 735iL Service and Repair Manual

This factory service and repair manual for the 1989 BMW 735iL describes one car in one form, a four-door sedan in Base trim with a 3.5L single-overhead-cam inline-six, naturally aspirated and gasoline-fueled, and follows it from the cylinder head to the trunk lid. There is no second engine to work around and no trim-specific mechanical branch, so specifications read directly. Procedures, torque values, clearances, wiring diagrams and diagnostic steps are grouped by system in the order a repair usually takes.

Engines covered

• 3.5L inline-six — SOHC, naturally aspirated, gasoline

Body styles covered

• 4-door sedan

Trims covered

• Base

Known issues on the 1989 735iL. Most of what goes wrong on a sedan this age is measurable, and the measurements are here for the 1989 735iL: valve clearances and timing figures for the inline-six, fuel delivery pressures and ignition settings, cooling system capacity and thermostat data, transmission and rear axle service specifications, and brake friction and rotor dimensions. Suspension and steering sections add alignment values and bushing procedures. The electrical chapters supply the sedan's wiring diagrams together with the tests that distinguish a supply fault from a ground or a failed switch.