CSL differs from usual S54 by improved intake system, aggressive camshafts (duration 288/280, lift 11.6/11.6 mm), exhaust valves and the lightweight exhaust system.
This car produced in 2003 in limited edition. The most powerful modification of S54 installed on the lightweight version E46 M3 CSL. Two additional catalytic converters cased difference in 10 horsepower between US and Euro versions. Its power decreased to 325 HP (Euro version) and to 315 horsepower (US version).ĭifferences between S54 M3 and S54 Z3M consist in the changed intake manifold and air filter housing. Differences between US E46 M3 and Euro version consist in two additional catalytic converters. All these changes helped to increase the power of the engine to 343 horsepower at 7,900 rpm and a torque 365 at 4,900 rpm.Į46 M3 engine with power of 333 HP produced for North American. The electronic control unit of S54B32 – Siemens MSS 54. The stock size of fuel injectors of S54 – 247 cc/min. Individual throttle bodies still used on intake. Valve clearances are following (cold engine): inlet 0.18 – 0.23 mm, exhaust 0.28 – 0.33 mm. S54 still haven’t hydraulic lifters so every 30,000 miles of mileage (50,000 km) you have to adjust valves. There were following changes in cylinder head: improved continuously variable valve timing system Double-VANOS, used new cast iron hollow camshafts (duration 260/260, lift 12/12 mm) and decreased weight of the cylinder head.
The pistons are cooled by oil spray nozzles. Also applied reinforced forged connecting rods (length 139 mm), new high compression pistons (CR=11.5), their compression height 32.3 mm. Cast-iron cylinder block of this engine has been improved: increased bore to 87 mm, forged crankshaft with a stroke of 91 mm and with 12 counterweights. New S54 inline-6 based on the European version BMW S50B32. This motor is the flagship of series M54 (which included M54B22, M54B25 and M54B30). Neither the motor for North America not for Europe used in this model. In 2000 there was next BMW M3 in E46 body. Normal engine operating temperature, ☌ (F)īMW S54 engine reliability, problems and repair
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