The Russian automotive market today is saturated with offers from Chinese manufacturers, and the model BAIC U5 Plus takes a strong position in the budget sedan segment. The basis for the reliability of any car is its power unit, and it is the engine that becomes the main object of attention of potential buyers and current owners. In this article we will analyze in detail the design, technical nuances and operational features of the engine installed under the hood of this popular sedan.
Company engineers BAIC Motor equipped the U5 Plus model with a time-tested power unit, which has proven itself as a reliable solution for city use and highway travel. Understanding of operating principles and design features This engine will allow owners to extend the life of the car and avoid costly repairs. We will consider not only dry numbers from the specification, but also real impressions of operation.
Particular attention should be paid to the combination of engine and transmission, since it is this tandem that determines the character of the car on the road. Proper tuning and adaptation of components to each other make it possible to achieve acceptable dynamics with modest fuel consumption. Below we will go into detail on all the aspects that every owner or buyer needs to know.
Technical characteristics of the power unit
With my heart BAIC U5 Plus is a 1.5 liter naturally aspirated petrol engine, which belongs to the series A15E. This engine is designed to meet modern environmental standards and fuel efficiency requirements. The absence of turbocharging in this modification indicates the engineers’ desire for maximum simplicity and reliability of the design at the expense of high power.
Power figures are 115 horsepower, and torque reaches 148 Nm at 4500 rpm. Such parameters are standard for class B+ and ensure confident movement in city traffic. Distributed injection fuel allows the use of AI-92 gasoline, which significantly reduces operating costs for the owner.
Structurally, the engine has an aluminum cylinder block and cylinder head, which has a positive effect on heat transfer and the overall weight of the car. Usage chain drive The gas distribution mechanism is an important advantage over belt analogues, since the chain lasts much longer and requires replacement less often.
- 🚗 Engine capacity: 1498 cubic centimeters.
- ⚙️ Number of cylinders: 4 in a row.
- 🔥 Power system: distributed injection (MPI).
- 🌪️ Ecological class: Euro-5.
It is worth noting that the engine cooling system is designed to operate in various climatic conditions. Effective heat removal is critical to maintaining piston life and preventing detonation. When used in hot climates or under prolonged loads, the system demonstrates stable operation.
Design features and technologies
Engine BAIC A15E equipped with two camshafts located in the cylinder head (DOHC). This scheme allows you to optimize the filling of the cylinders with the fuel-air mixture at different operating modes. A system is used to adjust the valve timing VVT (Variable Valve Timing) on the intake shaft.
⚠️ Attention: Using low-quality engine oil can lead to rapid failure of the VVT system phase shifter, which will cause loss of power and unstable idling.
The intake manifold is made of plastic, which helps the engine warm up faster in winter and reduces the overall weight of the structure. The exhaust manifold is integrated with the catalytic converter, which is located as close as possible to the engine for quick access to operating mode. This ensures compliance with strict emission standards.
The lubrication system includes a gear-driven oil pump that provides stable pressure even at high speeds. It is important to monitor the level and condition of the oil, since hydraulic valve compensators are sensitive to its quality. Regular replacement oil filter is a mandatory procedure for a long motor life.
Dynamics and fuel consumption
Dynamic characteristics BAIC U5 Plus with a 1.5 liter engine can be described as sufficient for everyday driving. Acceleration to 100 km/h takes about 12-13 seconds, which is average for this class. The engine is most responsive in the range from 3000 to 5000 rpm, where maximum torque is available.
Fuel consumption is one of the key parameters of interest to buyers. In the combined cycle, the engine consumes about 6.5–7.0 liters of gasoline per 100 kilometers. In city mode with frequent stops, consumption can increase to 8.5 liters, while on the highway at a speed of 90-100 km/h it is possible to keep within 5.5–6.0 liters.
Acceleration dynamics and efficiency are affected not only by the engine itself, but also by the type of transmission installed. A manual transmission allows the driver to choose the optimal speed, saving fuel. The variator (CVT), in turn, provides a smooth ride, but can create a “thoughtful” effect when you press the gas pedal sharply.
| Parameter | Meaning | Note |
|---|---|---|
| Maximum power | 115 hp | At 6000 rpm |
| Maximum torque | 148 Nm | At 4500 rpm |
| Consumption (city) | 8.5 l/100 km | Depends on traffic |
| Consumption (highway) | 5.8 l/100 km | At 90 km/h |
| Fuel | AI-92 | Let's say AI-95 |
Typical faults and problems
Despite its overall reliability, the engine BAIC A15E may encounter a number of typical problems, especially if maintenance regulations are not followed. One of the common complaints from owners is floating idle, which is often caused by contamination of the throttle body or incorrect operation of the throttle position sensor.
Another potential problem is the timing chain stretching after a mileage of 100-120 thousand kilometers. Although the life of a chain is higher than that of a belt, it does not last forever. Signs of stretching include noise when starting the engine and errors in valve timing. Ignoring these symptoms can lead to the chain jumping and the valves meeting the pistons.
- 🔧 EGR (exhaust gas recirculation) valve is dirty.
- 📉 Failure of ignition coils when using bad fuel.
- 💧 Valve cover gasket leaking at high mileage.
- 🌡️ Thermostat malfunction leading to overheating or underheating.
It is also worth mentioning the sensitivity of the engine to fuel quality. Low octane number or the presence of impurities in gasoline can cause detonation, which has a destructive effect on the piston group. Knock sensor in such cases, it adjusts the ignition timing, but with constant exposure the engine life is reduced.
⚠️ Attention: If extraneous knocks or vibrations appear in the engine operation, it is necessary to immediately carry out diagnostics. Operating a vehicle with a faulty engine may result in major repairs.
☑️ Engine diagnostics when buying a used one
Maintenance schedule
To ensure long and trouble-free engine operation BAIC U5 Plus it is necessary to strictly adhere to the maintenance regulations. It is recommended to make the first engine oil change after 2000-3000 kilometers (break-in), and then follow the schedule established by the manufacturer.
Official regulations require oil changes every 10,000 kilometers or once a year, whichever comes first. However, in Russian operating conditions, characterized by traffic jams and temperature changes, it is better to reduce the replacement interval to 7000–8000 kilometers. This will preserve the protective properties of the lubricant.
The list of maintenance work also includes replacing the air filter, spark plugs and checking the condition of the drive belts of the attachments. It is recommended to change spark plugs every 30-40 thousand kilometers, even if they look working, since the gap between the electrodes increases over time.
Oil change procedure:1. Warm up the engine to operating temperature.
2. Raise the vehicle on a lift.
3. Unscrew the drain plug and drain the used oil.
4. Replace the oil filter.
5. Screw on the new drain plug with a new washer.
6. Fill in new oil through the filler neck.
Particular attention should be paid to the cooling system. Antifreeze must be changed every 60,000 kilometers or every 3 years. Old fluid loses its anti-corrosion properties and can cause scale to form in the cooling channels, which will impair heat dissipation.
Reviews from owners and experts
Analyzing reviews from real owners BAIC U5 Plus, we can conclude that the engine is perceived as a reliable and predictable unit. Users note its quiet operation at idle and the lack of tendency to burn oil with timely maintenance. Many people praise the possibility of using AI-92 gasoline.
However, there are also complaints about the lack of traction when overtaking on the highway, especially when the car is fully loaded. Automotive industry experts characterize this engine as a “workhorse” that does not surprise with records, but honestly performs its functions. The main requirement for the owner is high-quality fuel and fresh oil.
In the long term, the engine shows good survivability. The design without a turbine and direct injection makes it less demanding in terms of quality of service compared to more modern and complex analogues. It does BAIC U5 Plus an attractive option for those looking for a simple and straightforward car.
What is the real service life of the BAIC U5 Plus engine?
If you follow the maintenance regulations and use high-quality consumables, the engine life before major overhaul is 250-300 thousand kilometers. The key factor is timely oil changes and monitoring the condition of the timing chain.
Can I use 5W-40 oil instead of 5W-30?
The manufacturer recommends a viscosity of 5W-30. The use of 5W-40 is acceptable in engines with high mileage (more than 150 thousand km) or when operating in very hot climates, but can lead to slightly increased fuel consumption and noise when cold.
Why does the engine stall when cold?
Troubleshooting when cold is often caused by a malfunction of one of the spark plugs or coil, as well as air leakage through the intake manifold gaskets. After warming up, the gaps may decrease and engine operation will stabilize.
Do I need to flush the engine when changing oil type?
If you are switching from one quality synthetic oil to another of the same viscosity, no flushing is required. Flushing oils only make sense when switching from mineral to synthetic or if there is a lot of dirt in the old oil.