Engine Mechanical:
Full rebuild procedures, diagnostics, component testing, specifications for M30B35 engine.
Engine Management:
Bosch Motronic DME system diagnostics, wiring diagrams, sensor testing, ECU troubleshooting.
Fuel System:
Fuel injection system overhaul, fuel pump, injectors, fuel pressure regulator, evaporative emission control (EVAP).
Ignition System:
Ignition coil, spark plug wires, distributor (if applicable to specific E34 variants), timing adjustments.
Transmission Manual:
G260/6 manual transmission overhaul, clutch replacement, shift linkage adjustments.
Transmission Automatic:
ZF 4HP22 automatic transmission diagnosis, fluid service, torque converter, valve body.
Drivetrain:
Driveshaft, universal joints, differential, half-shafts, wheel bearings.
Suspension Front:
MacPherson struts, control arms, sway bar, bushings, strut mount replacement.
Suspension Rear:
Multi-link independent rear suspension, trailing arms, coil springs, shock absorbers, bushings.
Steering:
Recirculating ball steering system, power steering pump, steering box, tie rods, steering column.
Brakes Front:
Vented disc brakes, caliper overhaul, brake pad replacement, rotor specifications.
Brakes Rear:
Solid disc brakes, caliper overhaul, brake pad replacement, rotor specifications.
Brake System Control:
ABS (Anti-lock Braking System) diagnostics and components, hydraulic unit, wheel speed sensors.
Electrical System Power:
Battery, alternator, starter motor testing and replacement.
Lighting System:
Headlights, taillights, interior lighting, bulb types, wiring.
Instrument Panel:
Gauges, warning lights, odometer, tachometer, instrument cluster repair.
HVAC System:
Heater core, A/C compressor, evaporator, blower motor, refrigerant service, climate control panel.
Body And Trim:
Door panel removal, interior trim components, weatherstripping, bumper replacement.
Body And Glass:
Windshield replacement, side window mechanisms, sunroof operation.
Wiring Diagrams:
Comprehensive electrical schematics for all major systems.
Routine Maintenance:
Oil changes, filter replacements, fluid checks, tire rotation, spark plug replacement.
Troubleshooting Diagnostics:
Step-by-step diagnostic trees for common and uncommon problems across all systems.
Engine Repair:
Engine rebuild, head gasket replacement, piston ring replacement, bearing service.
Transmission Repair:
Manual and automatic transmission rebuild, clutch assembly replacement.
Suspension Service:
Replacement of struts, shocks, control arm bushings, ball joints, tie rod ends.
Brake System Repair:
Brake pad/rotor replacement, caliper rebuild, bleeding the brake system, ABS component replacement.
Electrical Component Replacement:
Alternator, starter, fuel pump, ignition coil, ABS sensors, window motors.
HVAC Service:
Refrigerant recharging, compressor replacement, heater core flush, blower motor replacement.
Body Panel Repair Replacement:
Door adjustments, fender removal/installation, bumper repair.
Wheel Alignment Specifications:
Alignment angles for front and rear suspensions.
Diagnostic Techniques:
In-depth diagnostic flowcharts and troubleshooting guides, use of diagnostic tools.
Rebuild Procedures:
Complete engine and transmission overhaul procedures with detailed steps and torque specifications.
Specifications Data:
Engine torque values, valve clearances, fluid capacities, electrical resistance values, timing specs.
Special Tools:
Identification and usage of specialized BMW tools required for specific repairs.
Oil Change Interval:
Every 5,000-7,500 miles or 6-12 months, whichever comes first (using synthetic or high-quality conventional oil).
Coolant Flush Interval:
Every 2-3 years or 30,000 miles.
Spark Plug Replacement:
Every 30,000 miles (NGK BPR6ES or equivalent).
Transmission Fluid Service:
Manual: Inspect periodically. Automatic: Every 30,000-50,000 miles.
Engine Oil Type:
API SG or higher, SAE 10W-40 or 15W-50 recommended, 6.5 quarts (6.2 L) capacity.
Coolant Type:
BMW Blue Antifreeze or equivalent ethylene glycol based coolant (50/50 mix with distilled water).
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Power Steering Fluid:
ATF Dexron III (or equivalent) for models equipped with power steering.
Manual Transmission Fluid:
API GL-4, SAE 75W-90 synthetic gear oil (approx. 1.7 liters for G260).
Automatic Transmission Fluid:
ZF TE-ML 11A/B or Dexron III (approx. 3.5 liters for torque converter refill).
Engine Oil Leaks:
Common from valve cover gasket, oil pan gasket, and front/rear main seals due to age and material degradation.
Cooling System:
Radiator, hoses, and water pump are prone to age-related failure. Head gasket issues can occur with overheating.
Suspension Bushings:
Rubber bushings in control arms, subframes, and sway bars degrade over time, leading to noisy or imprecise handling.
Electrical Gremlins:
Corroded connectors, failing relays, and aging wiring harnesses can cause various intermittent electrical issues.
HVAC Blower Motor Resistor:
Common failure point, leading to the blower only working on high speed.
ABS Module Failure:
Older ABS systems can be prone to module or sensor failures.
Fuel Injector Problems:
Clogging or failure of fuel injectors can cause rough running or misfires.