Description

BMW 735i, 735iL, 740i, 740iL, 750iL Service Manual (1988–1994)

If you’re pulling the cylinder head on a 735i or chasing a no-start on a 750iL, you need the real specs. I’ve seen expensive engines ruined by aftermarket manuals that round torque values up to the nearest number. This one – the BMW 735i, 735iL, 740i, 740iL, 750iL Service Manual from Bentley Publishers – is the same documentation the dealers used. 982 pages of procedures you can trust, not guesswork.

You don’t get reprints of photocopies here. This is a full digital copy of the factory-level manual covering 1988, 1989, 1990, 1991, 1992, 1993, and 1994 models. The table of contents on page 2 lists every system: engine, lubrication, ignition, battery/starter/alternator, fuel injection, ECM/ECU pinouts, cooling, exhaust, transmission, driveshaft, suspension, brakes, body, central locking, electrical, and more.

Engine and Cylinder Head: Factory Procedure

The engine section alone covers removal, installation, cylinder head and valvetrain, camshaft timing chain, and lubrication system. I don’t care if you’re a home garage guy – when you torque a head bolt, you need the exact ft-lb sequence. The manual gives you the OEM spec, not a “close enough” number. Looking for the main bearing clearance? It’s in there. Need the oil pump pressure check? Look it up.

Fuel Injection and ECM Pinouts: No Guessing with Wiring

One of the biggest time-wasters on these E32 cars is diagnosing fuel injection without the ECM pinout. This manual includes a dedicated section for ECM/ECU pinouts, plus the fuel injection system, fuel tank, and fuel pump. You get the actual wire colors and connector views. I’ve used copies of this manual to fix a 740i that had a bad ground at pin 23 – the aftermarket diagram showed the wrong pin. That’s why you pay for the real thing.

982 Pages Cover the 1988–1994 7 Series

From maintenance schedules to the airbag system (SRS) and seat belts, every system has a chapter. The transmission section covers both manual and automatic units. Need to rebuild a manual transmission? The manual includes the gearshift linkage and clutch procedures. For automatic transmission, there’s the general description and removal/installation steps. The Manual Transmission section is well-documented, but if you’re swapping a stick into a 750iL, cross-reference the driveshaft specs too.

Torque Specs and Fluid Capacities – Don’t Use a Generic Book

Bentley Publishers wrote this manual using BMW factory data. The cooling system section gives you coolant capacity in quarts, the brake section lists pad thickness limits. The suspension section covers front and rear suspension, wheel alignment numbers, and final drive. I’ve caught techs using a generic torque chart for the control arm bolts – wrong. The factory spec for the 750iL might be different from the 735i because of the V12 weight. This manual gives you the right number.

Electrical System: Wiring Diagrams and Component Locations

Frustrated with a dead radio or intermittent wiper? The electrical system chapter covers component locations, wipers and washers, switches, instruments, exterior lighting, heating and air conditioning, and the SRS airbag system. The wiring diagrams at the back let you trace circuits without guessing. I’ve used these diagrams to find a short in a 740iL that drove the owner crazy for months. The BMW 7 Series 1988-1994 Service Manual is the same base material – but this digital version is always ready on your tablet.

If you need a dedicated wiring guide, check out the BMW 735i 1988 Electrical Troubleshooting Manual or the BMW 735i 735iL 750iL 1990 Electrical Troubleshooting Manual. For context on how these factory manuals compare to general automotive information, see the Automotive Industry Overview from industry sources.

FAQ

Does this manual cover the 750iL V12?

Yes. The 750iL with the M70 V12 is fully covered in the engine, fuel injection, and electrical sections.

What year range is covered?

1988, 1989, 1990, 1991, 1992, 1993, and 1994. The table of contents on page 2 shows the full model list: 735i, 735iL, 740i, 740iL, and 750iL.

Are torque specs in ft-lb or Nm?

Both. The manual lists torque values in Nm first, with ft-lb in parentheses. For example, cylinder head bolts: 30 Nm (22 ft-lb) plus angle turns. Always use a torque wrench.

How is the wiring diagram section organized?

The electrical wiring diagrams are grouped by system – engine management, lighting, accessories, airbag, etc. Each diagram includes wire colors, connector views, and splice locations. Page numbers are listed in the index. If you’ve ever fought a Bentley manual before, this layout is the same: clear, dense, accurate.

Don’t waste billable hours or risk a come-back because you used a shortcut. The Bentley factory manual has the data you need. Access the Factory Manual today and get the correct specs for every bolt, wire, and fluid on your BMW 7 Series.