One of the most common methods of increasing power on a 2.5 M54 is converting it into a 3-liter engine (Stroker). In general, buying an M54B25 engine for swap in E30 or E36 is a good decision, the motor is reliable and durable. The problems of the M54B25 are in many ways similar and completely repeat the shortcomings of the older model M54B30, you can learn about them. BMW M54B25 engine problems and malfunctions In the period from 2005 to 2006, the M54B25 engine began to be supplanted by the next generation of in-line sixes, with a displacement of 2.5 liters. This motor was used on BMW cars with an index of 25i. In addition, a 64mm diameter electronic butterfly valve and Siemens MS43 / Siemens MS45 control system (Siemens MS45.1 for US) are used. The cylinder head remained the same with double vanos, the long intake manifold was replaced with a new short one (-10 mm from M52TU) with wide DISA channels, which made it possible to increase power and let the engine breathe freely.
Differences between the M54 and the M52: the cylinder block of the new engine remained old, aluminum with cast-iron liners and a cast-iron crankshaft, connecting rods (145 mm) changed, light pistons appeared. The very popular 2.5-liter representative of the M54 series (which also included) appeared in the BMW production line in 2000 and replaced it. BMW M54B25 engine Characteristics of the M54V25 engine Productionįuel consumption, l / 100 km (for E60 525i)īMW M54B25 engine reliability, problems and repair
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