BMW diesel straight-6 2.5 L M57N 256 D4 161 HP at 4000 RPM, 400 N⋅m at 2000 RPM engine DIY maintenance and service manual

General Information

BMW diesel straight-6 2.5 L M57N 256 D4 161 HP at 4000 RPM, 400 N⋅m at 2000 RPM is an 2497 cc (2.2 UK qt.) internal combustion reciprocating Inline 6 engine. It has bore/stroke ratio of 84 mm × 75.1 mm (3.31 in × 2.96 in). This engine was rated 120 kW (160.92 hp) at 4000 rpm and 400 N⋅m (295.02 lbf⋅ft) of torque at 2000 rpm. It was used in BMW cars.

Engine Performance Rating

SAE J1349 (SAE Net)

BMW diesel straight-6 2.5 L M57N 256 D4 161 HP at 4000 RPM, 400 N⋅m at 2000 RPM engine performance rating according to SAE J1349 (SAE Net) standard.
Parameter	Output
Power Rating	120 kW (160.92 hp) at 4000 RPM
Torque Rating	295.02 lbf⋅ft295.02 lbf⋅ft400 N⋅m at 2000 RPM

Specifications

General

BMW diesel straight-6 2.5 L M57N 256 D4 161 HP at 4000 RPM, 400 N⋅m at 2000 RPM engine general specifications.
Parameter	Value
Type	Internal Combustion Reciprocating
Fuel Type	Diesel
Cylinder Configuration	Inline 6
Engine Displacement	152.38 in³152.38 in³2497 cc
Bore	3.31 in3.31 in84 mm
Stroke	2.96 in2.96 in75.1 mm

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Engine head and valvetrain

BMW diesel straight-6 2.5 L M57N 256 D4 161 HP at 4000 RPM, 400 N⋅m at 2000 RPM engine head and valvetrain specifications.
Parameter	Value
Valvetrain Type	DOHC
Valves per Cylinder	4

Air Intake

BMW diesel straight-6 2.5 L M57N 256 D4 161 HP at 4000 RPM, 400 N⋅m at 2000 RPM air intake specifications.
Parameter	Value
Air Intake Method	Turbocharger

Fuel Injection

BMW diesel straight-6 2.5 L M57N 256 D4 161 HP at 4000 RPM, 400 N⋅m at 2000 RPM fuel injection specifications.
Parameter	Value
Injection Type	GDI