The BMW M44B19 is a 1.9 L (1,895 cc, 115.6 cu·in) straight-four natural aspirated four-stroke liquid-cooled internal combustion gasoline engine, manufactured by Bayerische Motoren Werke AG from 1996 to 2000.
It has an 85.0 mm (3.35 in) cylinder bore and 83.5 mm (3.29 in) piston stroke. The compression ratio rating is 10.0:1.
The BMW M44B19 engine produced 140.0 PS (103 kW; 138.0 HP) at 6,000 rpm of maximum output power and 180 N·m (18.4 kg·m, 132.7 ft·lb) at 4,300 rpm of peak torque.
The BMW M44B19 features:
- Chain-driven double overhead camshafts (DOHC)
- 16 valves with hydraulic tappets
- Cast-iron cylinder block
- Crankshaft with four counterweights
- Multi Point Fuel Injection (MPFI)
- Bosch Motronic 5.2 engine management system
- Dual length intake manifold (BMW “DISA”)
- Liquid-cooled cooling system
General information
| Engine Specifications | |
| Engine model | M44B19 |
| Engine type | 4-stroke, DOHC, inline-4 |
| Displacement | 1.9 L, 1,895 cm3, (115.6 cu·in) |
| Max. horsepower | 140.0 PS (103 kW; 138.0 HP) at 6,000 rpm |
| Max. torque | 180 N·m (18.4 kg·m, 132.7 ft·lb) at 4,300 rpm |
| Cooling system | Liquid-cooled |
| Lubricating system | Pressurized lubrication |
| Fuel system | Multi Point Fuel Injection (MPFI) |
| Engine management system | Bosch Motronic 5.2 |
| Starting system | Electric starter 12V |
| Firing order: | 1-3-4-2 |
| Dimensions (L x W X H) | – |
| Dry weight | – |
Cylinder Block and Head
| Cylinder block | |
| Cylinder block alloy: | Cast-iron |
| Compression ratio: | 10.0:1 |
| Cylinder bore: | 85.0 mm (3.35 in) |
| Piston stroke: | 83.5 mm (3.29 in) |
| Cylinder internal diameter (standard): | 85.000-85.014 mm (3.3465-3.347 in) |
| Piston skirt outer diameter (standard): | 84.985 mm (3.3459 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Connecting rod big end diameter (standard): | 48.000-48.016 mm (1.8898-1.8904 in) |
| Connecting rod small end diameter (standard): | 22.005-22.012 mm (0.8663-0.8666 in) |
| Connecting rod center distance: | 22.000 mm (0.8661 in) |
| Side clearance (Top): | 0.020-0.200 mm (0.0008-0.0079 in) |
| Side clearance (Second): | 0.020-0.100 mm (0.0008-0.0039 in) |
| Ring end gap (Top): | 0.200-1.000 mm (0.0079-0.0394 in) |
| Ring end gap (Second): | 0.200-1.000 mm (0.0079-0.0394 in) |
| Ring end gap (Oil): | 0.400-1.400 mm (0.0157-0.0551 in) |
| Number of main bearings: | 5 |
| Crankshaft main journal diameter: | 60.000 mm (2.3622 in) |
| Crankpin journal diameter: | 45.000 mm (1.7717 in) |
| Cylinder head | |
| Cylinder head alloy: | Aluminium |
| Valve arrangement: | DOHC, chain-driven |
| Valves: | 4,(16 valves in total) |
| Head height: | 139.550-140.000 mm (5.4941-5.5118 in) |
| Valve head diameter (INTAKE): | 33.000 mm (1.2992 in) |
| Valve head diameter (EXHAUST): | 30.500 mm (1.2008 in) |
| Valve steam diameter (INTAKE): | 5.975-6.000 mm (0.2352-0.2362 in) |
| Valve steam diameter (EXHAUST): | 5.960-6.000 mm (0.2346-0.2362 in) |
Service Data
| Compression pressure | |
| Standard: | 10-11 bar (10.1-11.2 kg/cm2; 145-160 psi) |
| Oil system | |
| Lubrication system: | Pressurized lubrication |
| Oil type: | API SG or SF and better |
| Recommended oil: | SAE 10W-40, 5W-30 |
| Oil capacity: | 4.0 L (4.23 US. qt, 3.52 Imp. qt.) |
| Oil pressure: | 0.5 bar (0.51 kg/cm3; 7.25 psi) at Idle speed 4.3 bar (4.3 kg/cm3; 64.4 psi) at Rated speed |
| Ignition system | |
| Spark plug | Bosch FGR7DQP, NGK BKR6EQUP |
| Spark plug gap: | 0.5 mm (0.0197 in) |
Applications
| Model | Years Produced |
| BMW 318i, 318is, 318ti (E36) | 1996-2000 |
| Z3 1.9 | 1996-1999 |
References
1. BMW TIS (Technical Information System)
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