Diagnostic flowcharts for common drivability and system issues.
Technical Depth
Depth:
Expert level, covering complete overhauls and advanced diagnostics.
Diagnostics:
Detailed diagnostic procedures, including electrical testing and troubleshooting charts.
Torque Specifications:
Comprehensive torque values for all critical fasteners.
Special Tools:
Identification and usage instructions for BMW-specific tools.
📊 Manual Specifications
File Format
Digital Format:
Likely PDF; clarity on searchability and bookmarking is crucial for usability.
Print Quality
Print Quality:
High-quality reproductions with clear diagrams and text (if printed).
Binding Type
Binding:
Professional binding (e.g., spiral-bound, stitched) for durability in a workshop environment (if printed).
Paper Type
Paper Quality:
Durable, shop-friendly paper that resists grease and wear (if printed).
⚙️ Engine Specifications
Primary Engine
Engine Family:
BMW M20 Inline-6
Engine Variant 325E:
2.7L (2693cc) M20B27 'Eta' engine
Engine Variant 325Es:
2.7L (2693cc) M20B27 'Eta' engine (Sport Package)
Engine Variant 325:
2.5L (2494cc) M20B25 inline-six (Note: Manual states '325', usually referring to the 2.5L variant, but product description prioritizes 325e/es. Clarification is key for buyers.)
Performance
Horsepower 325E/Es:
Approximately 121 hp @ 4800 rpm (lower RPM torque focus)
Torque 325E/Es:
Approximately 170 lb-ft @ 3250 rpm
Horsepower 325 (2.5L):
Approximately 168 hp @ 5800 rpm
Torque 325 (2.5L):
Approximately 164 lb-ft @ 4300 rpm
Fuel System
Fuel Delivery:
Bosch Motronic electronic fuel injection (EFI)
Fuel Type:
Unleaded gasoline
Compression Ratio 325E/Es:
8.0:1 (for 'Eta' engine's focus on low-end torque and efficiency)
Compression Ratio 325 (2.5L):
8.8:1
🔧 Transmission
Standard
Standard Transmission:
5-speed manual transmission (Getrag 260/5 common)
Optional
Optional Transmission:
4-speed automatic transmission (ZF 4HP22 common)
Features
Clutch Type:
Hydraulically actuated single dry plate clutch
Differential:
Limited-slip differential (LSD) often optional or standard on certain trims (e.g., 'es')
📐 Dimensions
Exterior
Wheelbase:
Approx. 101.2 inches (2570 mm)
Length:
Approx. 170.5 inches (4330 mm)
Width:
Approx. 65.4 inches (1660 mm)
Height:
Approx. 55.0 inches (1397 mm)
Weights
Curb Weight:
Varies by model and options, typically 2800-3000 lbs (1270-1360 kg)
Gross Vehicle Weight Rating:
Typically around 3700-3900 lbs (1678-1769 kg)
🛡️ Safety Features
Ratings
Crash Test Data:
Limited modern standardized crash test data available for this era; E30 known for robust build quality for its time.
Active Features
ABS:
Anti-lock Braking System (ABS) available as an option on later models.
Passive Features
Seatbelts:
Three-point front seatbelts with inertia reels, lap belts in rear.
Body Structure:
Reinforced safety cage, crumple zones.
💡 Technology Features
Infotainment
Audio System:
Factory cassette radio with optional CD player, often with amplifier under seat. Basic AM/FM tuner.
Driver Assistance
Cruise Control:
Available on most models, vacuum-actuated or electronic.
Connectivity
OBD Port:
Early BMW diagnostic systems (check for specific diagnostic port location and protocol compatibility in manual).
🔧 Maintenance
Service Intervals
Oil Change Interval:
Typically every 5,000-7,500 miles or 12 months (refer to manual for specific interval based on driving conditions).
Timing Belt Interval:
M20 engines use a timing belt; replacement typically recommended every 50,000-60,000 miles or 4-5 years, due to high risk of catastrophic failure if it breaks.
Coolant Flush Interval:
Every 2-3 years or 30,000-50,000 miles.
Fluid Specifications
Engine Oil Type:
Refer to manual for specific viscosity (e.g., 15W-40, 10W-40, 20W-50 depending on climate and original BMW recommendation). Synthetic oils are highly recommended.
Engine Oil Capacity:
Approx. 5.5 quarts (5.2 liters) with filter change (for M20).
Coolant Type:
Ethylene glycol-based coolant, typically a 50/50 mix with distilled water. BMW Blue or Pentosin G48 compatible.
Transmission Fluid Manual:
BMW MTF LT-1 or compatible manual transmission fluid (e.g., Red Line MTL).
Transmission Fluid Automatic:
ZF Lifeguardfluid 4HP22 or equivalent ATF (Dexron II/III compatible).
Brake Fluid Type:
DOT 4 brake fluid.
Known Issues
Engine Common Problems:
Cooling system component failures (water pump, hoses, radiator), head gasket leaks (especially on higher mileage units), fuel distributor issues, rough idle.
Suspension Common Problems:
Worn bushings (control arm, trailing arm), leaking shocks, worn ball joints and tie rods.
Electrical Common Problems:
Corrosion in wiring harnesses, failing instrument cluster pixels, weak grounds, alternator and starter motor wear.
Body Common Problems:
Rust, particularly around wheel wells, rocker panels, sunroof drain areas, and rear shock towers.
Eccentric Shaft Sensor Issue:
While more prevalent on later M42 engines, some M20s can have oil leaks around the eccentric shaft seal.
📚 Vehicle History
Brand Heritage
Bmw Legacy:
BMW's reputation for building driver-focused, high-performance vehicles.
Model Evolution
E30 Introduction:
The E30 was introduced in 1982 as the successor to the E21 3 Series.
E30 Lineup Expansion:
The 325e and 325es models were introduced to offer more torque and a smoother power delivery, targeting a broader market segment.
Production
Manufacturing Location:
Primarily Germany
E30 Significance:
The E30 is considered one of BMW's most iconic and successful generations, laying the groundwork for future 3 Series models.
🏆 Awards & Recognition
Recognitions
E30 Legacy Awards:
Consistently ranked as a 'best driver's car' and a classic sports sedan by automotive publications. Often recognized for its longevity and handling characteristics.
Ratings
Enthusiast Ratings:
Highly regarded by BMW enthusiasts and collectors worldwide.
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