The BNM engine is a turbocharged 1.4 liter diesel engine. The maximum power of the engine is about 70 hp. s., torque – 155 Nm at 2800 rpm.
This in-line ICE has 3 cylinders, 6 valves, as well as a SOHC system. The cylinder block is made of cast iron, the cylinder head is made of aluminum alloy.
The timing drive works on a belt. The belt drive is recommended to be changed every 90 km to avoid a break. The BNM engine is under the hood of cars such as SEAT, Skoda, VW, Audi.
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1.4 TDI (BNM) Engine Specs
Specifications | |
---|---|
Volume (cm3) | 1422 |
Power (hp) | 70 |
Torque | 155 Nm |
Timing drive | Belt |
Environmental class | Euro 3/4 |
Fuel type | DT |
ICE features | balance shaft |
Supply system | Pump-Injectors |
hydraulic lifters | Yes |
Cylinder block | Cast iron R3 |
cylinder head | aluminum 6v |
Cylinder diameter | 79.5 mm |
piston stroke | 95.5 mm |
Compression ratio | 19.5 |
Phase regulator | Not |
turbo | VGT |
Engine oil | 4.3L 5W-30 |
Average resource | 250,000 km |
1.4 TDI (BNM) Engine Advantages And Reliability
The main advantage of the BNM engine is its economy, low consumption of diesel fuel. The engine is lightweight and compact.
This is possible due to the in-line placement of 3 cylinders, although this design also has its drawbacks. A good resource of 250,000 km can be counted among the advantages of the engine.
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Disadvantages and Problems of the 1.4 TDI (BNM) engine
The most common problems in the BNM engine include noise during operation, but all diesel engines have this drawback. After a run of 180,000 km, breakdowns often begin.
Nozzles wear out – this is signaled by an indicator that registers a problem with glow plugs. Replacing nozzles is not a cheap procedure, so a detailed diagnosis must be carried out before replacement.
Another problem after a run of 150.000-180.000 km is the axial play of the crankshaft. But the most tangible drawback is in 3 cylinders, because of this there is noise.
It will require balancing the power engine at around 200,000 km of run. Not every master provides such a complex service.
Therefore, experts advise buying engines with 4 cylinders – if the number of cylinders is even, they balance each other.
1.4 TDI (BNM) Engine Tuning prospects
For the BNM turbo engine, the best tuning option would be firmware. With good firmware from a specialist, an increase of 20 liters is possible.
But after such tuning, a decrease in the resource is not excluded, so it is up to the owner of the car to decide whether this event is worth the money or not.
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Applicability of 1.4 TDI (BNM) engine
Skoda : Fabia (2004-2010), Roomster (2004-2010)