Volkswagen AUS engine
Content
Volkswagen (VAG) has developed another MPI engine, which is included in the line of VAG units EA111-1,6 (ABU, AEE, AZD, BCB, BTS, CFNA and CFNB).
Description
The engine engineers of the Volkswagen auto concern based on the ATN engine created a new version of the power unit, called the AUS. Its main purpose is to equip cars of a mass-market concern.
The engine was produced from 2000 to 2005 at the VAG plant.
AUS - in-line four-cylinder gasoline aspirated 1,6-liter, 105 hp. with and a torque of 148 Nm.
Installed on cars of the concern:
- Volkswagen Bora /1J2/ (2000-2005);
- Bora station wagon /1J6/ (2000-2005);
- Golf IV /1J1/ (2000-2005);
- Golf IV Variant /1J5/ (2000-2006);
- Seat Leon I /1M_/ (2000-2005);
- Toledo II /1M_/ (2000-2004).
The internal combustion engine retained the cast-iron cylinder block, due to which, at the expense of weight reduction, reliability and maintainability were increased.
The pistons are lightweight, with three grooves for the rings. Two upper compression, lower oil scraper. The piston skirts are coated with graphite to reduce friction. Piston pins are made in the standard version - floating, fixed in bosses with retaining rings.
The crankshaft is fixed in five bearings. Unlike 1,4 MPI, the shaft and main bearings can be replaced separately from the block.
The block head on AUS is 16-valve, with two camshafts. The shafts are located in a special bed. The valves are equipped with hydraulic compensators that automatically adjust their thermal clearance.
The timing drive is two-belt. On the one hand, this design made it possible to significantly reduce the size of the cylinder head, on the other hand, it played a negative role in the reliability of the drive. The manufacturer has not established the life of the belts, but strongly recommends that they be carefully inspected every 30 thousand km of the car.
Fuel supply system injector, distributed injection. Recommended gasoline - AI-98. Some economical car owners use AI-95 and even AI-92. The results of such "savings" sometimes turn into very high costs.
This is intelligible to the question "Why did you change the piston? Spaider from Dolgoprudny answered: “... a piece of the piston partition broke off. And he broke away because the previous owner poured 92 gasoline (which he himself told about). In general, you don’t have to spare money for gasoline for this engine, it doesn’t like bad gasoline».
Combined type lubrication system. The oil pump is gear-driven, driven by the crankshaft toe. System capacity 4,5 liters, engine oil specification VW 500 00|VW 501 01|VW 502 00.
The electrics include one common high voltage coil, NGK BKUR6ET10 spark plugs and a Siemens Magneti Marelli 4LV ECU.
With proper operation and timely maintenance, the AUS has proven itself to be a trouble-free unit.
Technical specifications
| Manufacturer | VAG car concern |
| Release year | 2000 |
| Volume, cm³ | 1598 |
| Power, hp from | 105 |
| Power index, l. s/1 liter volume | 66 |
| Torque, Nm | 148 |
| Compression ratio | 11.5 |
| Cylinder block | cast iron |
| Number of cylinders | 4 |
| Cylinder head | aluminum |
| The working volume of the combustion chamber, cm³ | 34.74 |
| Fuel injection order | 1-3-4-2 |
| Cylinder diameter, mm | 76.5 |
| The piston stroke, mm | 86.9 |
| Timing drive | belt |
| Number of valves per cylinder | 4 (DOHC) |
| Turbocharging | no |
| Hydraulic compensators | Yes |
| Camshaft adjuster | no |
| Lubrication system capacity, l | 4.5 |
| Applied oil | 5W-30 |
| Oil consumption (calculated), l / 1000 km | 0.5 |
| Fuel system | injector, port injection |
| Fuel | gasoline AI-98 |
| Environmental standards | Euro 4 |
| Resource | 300 |
| Location | transverse |
| Tuning (potential), l. With | 120* |
*without loss of resource
Reliability, weaknesses, maintainability
Reliability
The reliability of the unit is beyond doubt, but subject to the car owner observing several postulates of the manufacturer.
First, you need to use high-quality fuel. Power, durability, stable operation and mileage depend on this. Sergey3131 from St. Petersburg said about this: “… filled a full tank for the first time on the 98th. I refueled and didn’t recognize the car, it feels like it’s driving in a completely different way ... and most importantly, there is no tripping. The engine runs smoothly and elastically».
The manufacturer determined the resource of the unit at 300 thousand km. In practice, this figure is almost doubled. With the proper attitude, mileage of 450-500 thousand km is not the limit. Car service workers met with engines, the mileage of which was 470 thousand km.
At the same time, the state of the CPG made it possible to operate the engine further.
An important component of reliability is the margin of safety. AUS in this regard looks good. A simple chip tuning (flashing the ECU) allows you to increase the power to 120 hp. with no effect on the engine.
More in-depth forcing will make the motor 200-horsepower, but in this case, its technical characteristics will not change for the better. For example, the mileage resource, environmental standards for exhaust gas cleaning will decrease. The material side of such tuning will be tantamount to acquiring a new, more powerful internal combustion engine.
Conclusion: AUS is a reliable unit when handled properly.
Weak spots
There are few weaknesses in the internal combustion engine, but some of them are quite significant.
Problematic timing drive. In the event of a broken belt, bending of the valves is inevitable.
Unfortunately, it's not just the valves that suffer. At the same time, pistons and cylinder head elements are destroyed.
Another common malfunction is the formation of cracks in the ignition coil housing. As Yanlavan from Ryazan writes: “... in this coil, the disease is cracks in the plastic. Accordingly breakdown". The best repair option would be to replace the coil with a new one, although there have been successful attempts to fill cracks with epoxy.
A lot of complaints go to the USR and the throttle assembly. The use of low-quality gasoline leads to very rapid contamination. Flushing solves the problem, but not for long (gasoline remains the same!).
In addition to clogging, valve malfunctions can cause malfunctions in the computer. Unstable operation of the listed units leads to unstable engine speeds.
With high mileage, an oil burn of the unit may occur. As a rule, the culprits of this phenomenon are worn rings or valve stem seals. In most cases, replacing them solves the problem.
Some car owners encountered another nuisance - coolant leakage from the thermostat and plastic pipes of the cooling system. Troubleshooting is simple, but in some cases it is better to use the services of a car service.
Maintainability
Like all engines MPI AUS has a high maintainability. This is facilitated by the simple design of the internal combustion engine and the cast-iron cylinder block.
Many car owners repair the unit themselves. To do this, in addition to knowing the device of the motor, special tools, fixtures and experience in restoration work are needed. On a specialized forum there is a Seal entry from St. Petersburg on this subject: “... a normal engine. 105 forces, 16 valves. Nimble. Timing belt changed by myself. Together with piston rings».
There are no problems with the purchase of spare parts. They can be found in any specialized store. For high-quality repairs, it is necessary to use only original components and parts. It is better not to use analogues or used ones, since the former are not always of high quality, and the latter do not have a residual resource.
If you need a full overhaul, it makes sense to consider the option of purchasing a contract engine.
Its cost depends on many factors (mileage, availability of attachments, etc.) and starts from 30 thousand rubles.
The Volkswagen AUS engine is reliable and durable with an appropriate attitude from the car owner.
