Target Audience:
BMW E30 owners seeking to perform their own maintenance, repairs, or restoration; independent repair shops specializing in BMW vehicles.
Value Proposition:
Provides comprehensive, in-depth technical information typically found in official BMW workshop manuals, enabling significant cost savings on repairs and maintenance.
Completeness:
Covers all essential aspects of vehicle repair and maintenance, from basic tune-ups to complex overhauls.
Diagrams And Illustrations:
Contains detailed exploded diagrams, wiring schematics, and procedural illustrations to aid understanding.
Troubleshooting Guidance:
Offers structured troubleshooting trees to efficiently diagnose issues.
Engine:
Detailed overhaul, tuning, emissions control, cooling system, lubrication system, fuel system (including Bosch L-Jetronic and Motronic).
Transmission:
Manual (Getrag 260) and Automatic (ZF 4HP22) transmission removal, installation, internal repair, and fluid specifications.
Drivetrain:
Driveshaft, differential, rear axle, clutch assembly, and related components.
Suspension:
Front and rear suspension, shock absorbers, springs, control arms, ball joints, bushings, wheel bearings, and alignment procedures.
Steering:
Power steering system diagnosis and repair, steering rack, tie rods, and steering column.
Brakes:
Front and rear disc brakes, ABS (Anti-lock Braking System) diagnosis and repair, brake fluid specifications, master cylinder, and brake lines.
Electrical:
Complete wiring diagrams, starter motor, alternator, battery, ignition system, lighting, gauges, accessories, fuses, relays, and diagnostic troubleshooting.
Bodywork:
Exterior body panels, doors, hood, trunk, bumpers, glass, interior trim, and seat adjustments.
Heating And Air Conditioning:
HVAC system components, refrigerant, compressor, blower motor, and climate control panel.
Maintenance:
Routine maintenance, oil changes, filter replacements, spark plug service, coolant flushes, and belt inspections.
Troubleshooting:
Diagnostic charts and flowcharts for identifying and resolving common problems across all major systems.
Repair:
Step-by-step instructions for component removal, repair, and reinstallation, including torque specifications and clearances.
Rebuild:
Detailed procedures for engine and transmission rebuilds, including component specifications and tolerances.
Diagnostics:
Advanced diagnostic techniques for electrical systems, fuel injection, and emission control systems.
Depth:
Comprehensive coverage suitable for both DIY enthusiasts and professional mechanics, including detailed technical data, diagrams, and specifications.
Engine Code 325 325Es:
M20B25
Configuration:
Inline 6-cylinder
Displacement 325 325Es:
2.5 Liters (2494 cc)
Displacement 325E:
2.7 Liters (2693 cc)
Horsepower 325 325Es:
168 hp @ 5800 rpm
Horsepower 325E:
121 hp @ 4250 rpm (often referred to as 'Eta' engine for torque focus)
Torque 325 325Es:
164 lb-ft @ 4300 rpm
Torque 325E:
170 lb-ft @ 3250 rpm
Fuel Delivery:
Bosch L-Jetronic or Motronic fuel injection
Fuel Type:
Unleaded Gasoline (Premium Recommended)
Coolant Type:
BMW Blue Antifreeze/Coolant (G48 or equivalent) or a 50/50 mix of Ethylene Glycol and distilled water.
Oil Type Recommendation:
Synthetic SAE 15W-40 or 20W-50 depending on climate. Consult manual for precise specifications.
Oil Capacity:
Approximately 5.5 US quarts (5.2 Liters) with filter change (verify in manual).
Standard Transmission Type:
5-speed Manual (Getrag 260)
Optional Transmission Type:
4-speed Automatic (ZF 4HP22)
Transmission Fluid Manual:
BMW MTF LT-2 or equivalent (e.g., Red Line MTL)
Transmission Fluid Automatic:
Dexron II or equivalent (verify specific BMW specification in manual).
Oil Change Interval:
Approximately every 5,000 to 7,500 miles (8,000 to 12,000 km) or annually, depending on driving conditions. Refer to manual for specific recommendations.
Spark Plug Replacement:
Typically every 30,000 miles (48,000 km) for standard plugs; consult manual for specific plug type and interval.
Coolant Flush:
Every 2 years or 30,000 miles (48,000 km).
Timing Belt Replacement:
The M20 engine uses a timing belt. Replacement interval is typically around 40,000 to 60,000 miles (64,000 to 96,000 km) or 4-5 years. Crucial to check and replace.
Brake Fluid:
DOT 3 or DOT 4 (verify specific BMW specification).
Power Steering Fluid:
ATF Dexron II or BMW CHF 11 S (verify specific to model and year).
Cooling System Leaks:
Common issues include radiator leaks, hose degradation, and water pump failure. Overheating can lead to significant engine damage.
Fuel Injector Issues:
Clogged or failing injectors can cause rough idling, misfires, and poor performance.
Rubber Bushings Wear:
Suspension and subframe bushings are prone to wear and cracking over time, affecting ride quality and handling.
Wiring Harness Degradation:
Age-related degradation of wiring insulation can lead to electrical faults.
