Engine Mechanical:
Complete overhaul procedures, component testing, tuning, lubrication systems, cooling systems, fuel delivery systems, exhaust systems.
Engine Management:
Bosch L-Jetronic fuel injection system (or Motronic if applicable to later E28 models), ignition system, sensor diagnostics, ECU troubleshooting.
Transmission:
Manual (Getrag 260) and Automatic (ZF 4HP22) transmission overhaul, clutch service, torque converter, gear shift mechanisms, fluid specifications, troubleshooting.
Drivetrain:
Driveshaft, universal joints, differential, axle shafts, wheel bearings, troubleshooting.
Front Suspension:
MacPherson struts, control arms, sway bar, ball joints, bushings, wheel alignment specifications, shock absorber replacement.
Rear Suspension:
Semi-trailing arms, shock absorbers, springs, bushings, wheel alignment specifications, troubleshooting.
Front Brakes:
Ventilated discs, brake calipers, pads, hydraulic lines, bleeding procedures, master cylinder, ABS (if equipped).
Rear Brakes:
Solid discs or drums (depending on specific model variant), brake calipers, pads, parking brake mechanism, hydraulic lines.
Steering System:
Power steering system, steering rack, tie rods, power steering pump, fluid specifications, troubleshooting.
Wiring Diagrams:
Comprehensive wiring diagrams for all major systems, including engine management, lighting, instrumentation, accessories.
Charging System:
Alternator, voltage regulator, battery testing and replacement, wiring.
Ignition System:
Distributor, ignition coil, spark plugs, ignition timing, troubleshooting.
Lighting And Accessories:
Headlights, taillights, interior lights, power windows, mirrors, central locking, HVAC controls.
Exterior:
Body panel removal and installation, door mechanisms, window glass replacement, trim pieces, seals, bumpers, alignment.
Interior:
Seat removal and installation, dashboard disassembly, interior trim panels, headliner, carpeting, sound deadening.
Corrosion Protection:
Information on rust prevention, undercoating, and common rust areas for the E28 chassis.
Routine Maintenance:
Oil changes, filter replacements, spark plug service, fluid checks and top-offs, tire rotation, brake inspection.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon faults, symptom-based troubleshooting guides.
Component Replacement:
Detailed step-by-step instructions for replacing virtually all major and minor components.
Rebuilding Procedures:
Complete rebuild instructions for engines, transmissions, and other major mechanical assemblies.
Diagnostics:
Fault code lookup (if applicable), electrical testing methods, pressure testing, vacuum testing.
Depth Level:
Factory-level technical detail, suitable for professional mechanics and experienced DIY enthusiasts.
Engine Type:
Naturally Aspirated Inline 6-Cylinder
Displacement:
2.8 Liters (2788 cc)
Bore X Stroke:
86 mm x 96.8 mm
Compression Ratio:
8.0:1 or 8.5:1 (depending on market)
Horsepower:
170 hp @ 5800 rpm (approx.)
Torque:
225 Nm (166 lb-ft) @ 3000 rpm (approx.)
Fuel Delivery:
Bosch L-Jetronic Fuel Injection
Fuel Type:
Unleaded Gasoline (Premium)
Ignition Type:
Distributor-based, Electronic Ignition
Valve Train:
SOHC (Single Overhead Camshaft)
Cooling System:
Water-cooled, thermostatically controlled
Oil System:
Pressurized wet sump lubrication
Transmission Type:
Getrag 260 5-Speed Manual
Transmission Type:
ZF 4HP22 4-Speed Automatic
Clutch:
Hydraulically actuated single dry plate (manual)
Gear Ratios Manual:
Typically around 3.71:1 (1st), 2.26:1 (2nd), 1.41:1 (3rd), 1.00:1 (4th), 0.81:1 (5th)
Gear Ratios Auto:
Specific ratios documented in manual (e.g., 2.48:1 1st, 1.48:1 2nd, 1.00:1 3rd, 0.71:1 4th)
Transmission Fluid Manual:
API GL-4, SAE 75W-90 or 80W-90 gear oil
Transmission Fluid Auto:
Dexron III (or equivalent specification as per manual)
Oil Change Interval:
Typically every 5,000-7,500 miles (8,000-12,000 km) or 6-12 months, depending on driving conditions. Consult manual for precise intervals.
Filter Replacement:
Oil filter with every oil change. Air filter and fuel filter at recommended intervals (e.g., 15,000-30,000 miles).
Spark Plug Service:
Check and gap spark plugs every 15,000 miles; replace as per manual recommendations.
Transmission Fluid Change:
Manual: typically inspect every 30,000 miles, replace at 60,000-100,000 miles. Automatic: inspect every 30,000 miles, fluid and filter replacement often recommended between 50,000-80,000 miles.
Engine Oil Type:
API SG/SH or higher, SAE 10W-40 or 15W-50 (depending on climate). Manual will specify exact viscosity ranges.
Coolant Type:
Ethylene glycol-based antifreeze, mixed 50/50 with distilled water.
Brake Fluid Type:
DOT 3 or DOT 4.
Power Steering Fluid:
Typically ATF Dexron II/III or specific BMW power steering fluid.
Cooling System:
Radiator leaks, thermostat housing cracks, hose degradation. Water pump failures can occur.
Fuel System:
Fuel pump failures, injector clogging, early fuel accumulator issues (if applicable).
Electrical:
Alternator brushes wear, voltage regulator issues, corrosion in wiring connectors, headlight switch failures, OBC (On-Board Computer) issues.
Suspension And Bushings:
Worn control arm bushings, trailing arm bushings, shock mounts, and ball joints are common due to age and mileage.
Body Corrosion:
Common rust areas include wheel arches, rocker panels, rear quarter panels, battery tray, and trunk floor.
Engine Management:
Air flow meter issues (L-Jetronic), idle control valve problems, vacuum leaks.
Bmw Philosophy:
BMW, founded in 1916, has a long history of producing high-performance, luxury vehicles renowned for their driving dynamics and engineering excellence.
E28 Introduction:
The E28 generation of the 5 Series was introduced in 1981 (for the 1982 model year in North America) and replaced the E12. It was a significant evolution, featuring a more modern chassis, improved aerodynamics, and updated technology.
E28 Market Impact:
The E28 solidified BMW's reputation in the executive sedan market, known for its blend of comfort, sportiness, and reliability.
Production Period:
E28: 1981-1988 (globally)
Manufacturing Locations:
Germany (main), South Africa, Mexico, Thailand