The N52B30 is the first engine in the new N52 range (which includes the N52B25) with six cylinders in line. Unlike its predecessor (M54B30), the N52B30 is a completely new engine, with a new lightweight magnesium-aluminum cylinder block, a different crankshaft and a lightweight connecting rod and piston group.
The engine uses a new cylinder head using a variable valve timing system on the intake and exhaust camshafts Double-VANOS, and, for even greater efficiency, the Valvetronic II valve lift change system has been added. Their height varies from 0.18 mm to 9.9 mm. Exhaust valves – 9.7 mm. Phase 255/263. The diameter of the intake valves is 34.2 mm, exhaust 29 mm. Injectors have now also moved to the cylinder head, a DISA variable-length manifold is used at the inlet, a Siemens MSV70 engine management system, a chain is used in the timing.
The N52B30 engine was used on BMW cars with the 25i, 28i and 30i index, depending on the modification.
|Power output, hp||218 – 272|
|Torque output, Nm||270 – 315|
|Cylinder block||aluminum R6|
|Block head||aluminum 24v|
|Cylinder bore, mm||85|
|Piston stroke, mm||88|
|Phase regulator||double VANOS|
|Recommended engine oil||5W-30|
|Engine oil capacity, liter||6.5|
|Euro standards||EURO 4/5|
|Fuel consumption, L/100 km (for E87 130i)
|Engine lifespan, km||~275 000|
Disadvantages of the N52B30 engine
- After 100,000 km, valve stem seals often tan here and oil burns appear;
- The membrane of the crankcase ventilation valve also does not last long in this engine;
- All this leads to gradual coking and further to unstable engine operation;
- The cause of floating engine speeds is usually a malfunction of the Valvetronic or Vanos system;
- Electrically, the oil level sensor is often buggy, which is fraught with oil starvation;
- In power units of 2004 – 2009, hydraulic lifters clatter during a cold start.