Engine Mechanical:
Engine assembly, disassembly, cylinder head, block, crankshaft, pistons, connecting rods, timing.
Engine Management:
Bosch Motronic M1.3 fuel injection, ignition system, sensors, actuators, troubleshooting.
Fuel System:
Fuel pump, fuel filter, injectors, fuel lines, fuel tank, evaporative emissions control.
Cooling System:
Radiator, water pump, thermostat, hoses, fan, coolant specifications.
Exhaust System:
Exhaust manifolds, catalytic converter, mufflers, pipes, emissions.
Transmission:
Getrag 265 5-speed manual gearbox, clutch system, flywheel, driveshaft, differential.
Drivetrain:
Rear axle, limited-slip differential (LSD), half-shafts, wheel bearings.
Suspension:
Front and rear suspension components, struts, control arms, bushings, springs, shock absorbers.
Steering:
Power steering system, steering rack, tie rods, steering column.
Brakes:
Front and rear disc brakes, calipers, rotors, brake lines, master cylinder, ABS (optional).
Electrical System:
Battery, alternator, starter, wiring diagrams, fuses, relays, lighting, instrumentation.
Body And Chassis:
Body panel removal and installation, structural components, rust prevention, soundproofing.
Interior:
Seats, dashboard, door panels, trim, HVAC system.
HVAC:
Heating, ventilation, and air conditioning (HVAC) system components and service.
Diagnostics:
Troubleshooting guides for all major systems, fault codes (where applicable).
Routine Maintenance:
Oil changes, filter replacements, fluid checks, tune-ups.
Engine Rebuild:
Complete engine disassembly, inspection, repair, and reassembly procedures.
Transmission Overhaul:
Manual transmission disassembly, repair, and reassembly, clutch replacement.
Brake Service:
Brake pad and rotor replacement, caliper service, bleeding the brake system.
Suspension Repair:
Replacement of struts, shocks, control arms, bushings.
Electrical Troubleshooting:
Diagnosing and repairing electrical faults using wiring diagrams.
Body Repair:
Panel alignment, dent repair, rust treatment procedures.
Diagnostic Routines:
Step-by-step diagnostic procedures for common issues.
Depth Of Information:
Extremely high. Covers everything from basic maintenance to full engine and transmission rebuilds.
Diagnostic Capability:
Advanced diagnostic procedures and troubleshooting trees for most common and complex issues.
Rebuild Procedures:
Detailed instructions for rebuilding the S14 engine and Getrag 265 transmission.
Special Tools:
Lists and descriptions of required special tools for specific repairs.
Engine Type:
Inline-4, naturally aspirated, DOHC
Displacement:
2302 cc (2.3 Liters)
Bore X Stroke:
91 mm x 87.2 mm
Compression Ratio:
10.5:1
Horsepower:
192 hp (143 kW) @ 6900 rpm (Euro Spec), 200 hp (147 kW) @ 6900 rpm (Catalytic Converter Spec)
Torque:
170 lb-ft (230 Nm) @ 4750 rpm (Euro Spec), 177 lb-ft (240 Nm) @ 4750 rpm (Catalytic Converter Spec)
Fuel Injection:
Bosch Motronic M1.3 fuel injection with individual throttle bodies.
Fuel Type:
Premium Unleaded Gasoline (91 octane or higher recommended)
Fuel Pump Pressure:
Approx. 3.5 bar (50.8 psi)
Engine Oil Capacity:
5.7 Liters (6.0 US Quarts) with filter change
Coolant Capacity:
8.0 Liters (8.5 US Quarts)
Transmission Type:
Getrag 265 5-speed manual
Gear Ratios:
First: 3.72, Second: 2.40, Third: 1.71, Fourth: 1.24, Fifth: 0.97, Reverse: 3.45
Clutch Type:
Hydraulically actuated single-plate dry clutch
Optional Transmission:
None (E30 M3 was exclusively manual)
Limited Slip Differential:
Standard on E30 M3, typically 25% lock
Transmission Fluid Type:
BMW MTF-LT-2 or equivalent (e.g., Pentosin MTF II)
Transmission Fluid Capacity:
Approx. 1.5 Liters (1.6 US Quarts)
Oil Change Interval:
Every 7,500 - 10,000 miles (12,000 - 16,000 km) or annually, whichever comes first.
Filter Replacement:
Oil filter with every oil change, air filter every 15,000 - 30,000 miles, fuel filter every 30,000 miles.
Spark Plug Replacement:
Every 30,000 - 50,000 miles, depending on plug type (e.g., copper vs. platinum).
Brake Fluid Flush:
Every 2 years, regardless of mileage.
Coolant Flush:
Every 2-3 years or 30,000 miles.
Engine Oil Spec:
SAE 15W-50 or 20W-50 for warmer climates, SAE 10W-40 for cooler climates. Synthetic recommended. BMW High Performance SAE 20W/50 is a common recommendation for S14.
Power Steering Fluid Spec:
ATF Dexron II or Pentosin CHF 11S (check specific vehicle documentation)
Engine Oil Leaks:
Common from valve cover gasket, oil pan gasket, and front/rear main seals.
Valve Adjustment:
Requires periodic adjustment (shimming) for optimal performance and longevity.
Rear Subframe Mounts:
Can crack or weaken due to the stresses of performance driving. Reinforcement kits are available.
Cooling System Aging:
Plastic radiator end tanks can become brittle, hoses can degrade.
ABS Module Failure:
Common failure point on models equipped with ABS.
E Brake Adjustment:
May require periodic adjustment due to cable stretch.