The M52B28 engine, which debuted in 1995, is the senior member of the M52 family, which also consists of the M52B20, M52B24, M52B25, and S52B32. In North America, the engine block is made of cast iron; in Europe, it is made of nickel-plated aluminum.
The engine’s dimensions are square (84 x 84 mm), the cylinder diameter is the same as that of the M52B25, the crankshaft has a longer stroke, the piston compression height is 31.82 mm, and the cylinder head is from the M50B25TU. M52B28 injectors, 250 cc.
A modified version known as M52TUB28, which has cast iron sleeves and uses a double vanos system in place of vanos, was introduced in 1998. Additionally, it has a modified DISA variable geometry intake manifold, cooling system, electronic throttle, 244/228 camshafts, 9 mm lift, new pistons, and connecting rods.
BMW vehicles with the 28i index were equipped with this power unit.
Specifications
| Production years | 1995-2001 Munich Plant |
| Displacement, cc | 2793 |
| Fuel system | injector |
| Power output, hp | 193 |
| Torque output, Nm | 280 |
| Cylinder block | aluminum R6 |
| Block head | aluminum 24v |
| Cylinder bore, mm | 84 |
| Piston stroke, mm | 84 |
| Compression ratio | 10.2 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | single VANOS (M52B28) double VANOS (M52B28TU) |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 6.5 |
| Fuel type | petrol |
| Euro standards | EURO 2 (M52B28) EURO 3 (M52B28TU) |
| Fuel consumption, L/100 km (for E36 328i) — city — highway — combined |
11.6 7.0 8.5 |
| Engine lifespan, km | ~350 000 |
| Weight, kg | ~170 ~180 (TU) |
Disadvantages of the M52B28 engine
Temperature increase. Overheating and the subsequent development of cylinder head obstruction are characteristics of the M52 series. Cleaning the radiator, degassing the cooling system, and inspecting the radiator cap, thermostat, and pump are all essential.
Excessive use of oil. Piston rings frequently deteriorate. A liner will be needed if the cylinder walls’ wear is assessed; otherwise, the rings will need to be replaced. The crankcase ventilation valve should also be examined.
The ignition system is skipped. The cylinder’s functionality is diminished as a result of the hydraulic lifters coking, and the ECU then shuts it down. It is necessary to replace the hydraulic lifters.
The light for oil pressure turned on. Examine the oil pump or oil glass.
Vanos M52. Wear causes the motor to rumble, its thrust to decrease, its speed to change, and it to completely stop. A Vanos M52 repair kit is required.
Additional issues include knee and camshaft sensor failure, thermostat depressurization, inadequate cylinder head fastening, sensitivity to gasoline quality, and fewer resources than the previous model.