Engine Mechanical:
Engine assembly, cylinder head, block, crankshaft, pistons, connecting rods, camshaft, valve train, timing components
Engine Fuel System:
Bosch Motronic fuel injection, fuel pump, injectors, fuel lines, pressure regulator, ECU diagnostics
Engine Ignition System:
Ignition coil, distributor (if applicable), spark plugs, ignition timing, Motronic control
Engine Cooling System:
Radiator, water pump, thermostat, hoses, fan clutch, coolant specifications
Engine Exhaust System:
Exhaust manifold, catalytic converter, muffler, oxygen sensors
Transmission Manual:
Clutch, gearbox removal and installation, internal component overhaul, gear shift linkage
Transmission Automatic:
Transmission removal and installation, torque converter, internal components, hydraulic circuits, shift control
Drivetrain:
Driveshaft, universal joints, differential, axle shafts, wheel bearings
Suspension:
Front suspension (MacPherson struts, control arms, sway bar), rear suspension (semi-trailing arms, coil springs, shock absorbers, sway bar), alignment specifications
Steering:
Power steering system, steering rack, tie rods, steering column, power steering fluid specifications
Brakes:
Front and rear disc brakes, ABS (if equipped), brake system bleeding, caliper and master cylinder overhaul, brake fluid specifications
Electrical System:
Battery, charging system (alternator), starting system (starter motor), fuses, relays, wiring diagrams, lighting, instrumentation
Engine Management:
Motronic ECU, sensors (CTS, MAF, TPS, O2), actuators, diagnostic trouble codes (DTCs)
Body And Chassis:
Body panel removal and installation, door mechanisms, glass, seals, chassis components
Climate Control:
HVAC system, blower motor, heater core, A/C compressor, refrigerant, controls
Interior:
Seats, dashboard, trim panels, seat belts
Scheduled Maintenance:
Oil changes, filter replacements, tune-ups, fluid checks, inspections
Engine Repairs:
Top-end rebuilds, bottom-end rebuilds, gasket replacements, timing belt/chain service (if applicable, though M30 is chain driven)
Transmission Repairs:
Clutch replacement, gearbox overhaul, automatic transmission service
Suspension And Steering Repairs:
Component replacement (struts, shocks, bushings, ball joints, tie rods), power steering pump and rack service, wheel alignment procedures
Brake System Repairs:
Brake pad and rotor replacement, caliper rebuild, brake line replacement, ABS component diagnostics
Electrical Diagnostics:
Troubleshooting wiring faults, component testing, starter/alternator replacement, headlamp and taillight service
Fuel System Service:
Fuel pump replacement, injector cleaning/replacement, fuel filter replacement
Bodywork And Trim:
Removal and installation of exterior and interior trim, body panel adjustments
Troubleshooting Guides:
Diagnostic flowcharts for common problems, symptom-based troubleshooting
Depth Of Information:
Comprehensive from basic maintenance to complete engine and transmission rebuilds
Diagnostic Procedures:
Detailed diagnostic steps for all major systems, including electrical and fuel injection
Torque Specifications:
Extensive torque values for all fasteners and critical components
Clearances And Tolerances:
Specific measurements for engine parts, bearing clearances, etc.
Wiring Diagrams:
Full color, detailed electrical wiring schematics for all vehicle systems
Oil Change Interval:
Typically every 5,000 - 7,500 miles or annually, consult manual for exact specification
Spark Plug Replacement:
Around 30,000 miles, depending on plug type (e.g., platinum)
Transmission Fluid Change Auto:
Every 30,000 - 50,000 miles, crucial for longevity
Transmission Fluid Change Manual:
Every 50,000 - 75,000 miles
Engine Oil Type:
API SG or higher, SAE 15W-40 or 20W-50 depending on climate (check manual for precise grade)
Engine Oil Capacity:
Approx. 6.7 US quarts (6.3 Liters) with filter
Coolant Type:
BMW Blue Coolant or equivalent ethylene glycol based antifreeze
Brake Fluid Type:
DOT 3 or DOT 4
Power Steering Fluid:
BMW Power Steering Fluid or Pentosin CHF 11 S (check specific model requirements)
Engine Gaskets:
Oil leaks from valve cover, oil pan, and front/rear main seals are common due to age and material degradation
Suspension Bushings:
Worn control arm bushings, trailing arm bushings, and sway bar bushings can lead to poor handling and noise
Electrical Connections:
Corrosion and degradation of wiring connectors and grounds can cause intermittent electrical issues
Fuel Injectors:
Clogged or faulty fuel injectors can lead to rough idle, misfires, and poor performance
Cooling System Components:
Radiator, water pump, and hoses can degrade over time, leading to leaks and overheating
Digital Pmod Module:
The 'Digital Motor Electronics' or 'Power Module' can be a failure point in the engine management system