1.8-liter turbocharged engine Volkswagen BZB 1.8 TSI was assembled from 2007 to 2010 and installed on such popular models of the company as Passat B6, Seat Toledo and Audi A3. There was a unit under the index BYT, which is considered the predecessor of this motor.
Characteristics of engines 1.8 TSI BZB
| Characteristics | Value |
|---|---|
| Manufacturer | Volkswagen |
| Engine brand | EA888 |
| Years of production | 2007 – 2010 |
| Cylinder block material | cast iron |
| Power system | direct injection |
| Type | row |
| Number of cylinders | 4 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 84.2 |
| Cylinder diameter, mm | 82.5 |
| Compression ratio | 9.6 |
| Engine displacement, cc | 1798 |
| Power, hp/rpm | 120 – 170 / 3650 – 6200 |
| Torque, Nm/rpm | 230 – 250 / 1500 – 4800 |
| Fuel | AI-95 |
| Environmental standards | Euro 4 |
| Engine weight, kg | 144 – 154 |
| Oil consumption, gr./1000 km | up to 500 |
| Engine oil | 0W-30, 0W-40, 5W-30, 5W-40 |
| How much oil in the engine, liters | 4.6 |
| Oil change is carried out, km | 15,000 (7,500 recommended) |
| Engine life, thousand km | Factory: up to 300, In practice: 250-300 |
| Tuning, hp | Potential: 350+, Without loss of resource: ~250 |
Engine Application
The BZB engine has been installed in various models of Audi, Seat, Skoda and Volkswagen vehicles, including:
- Audi: A3 2 (8P) – 2007 – 2010
- Seat: Altea 1 (5P), Leon 2 (1P), Toledo 3 (5P) – 2007 – 2009
- Skoda: Octavia 2 (1Z), Superb 2 (3T) – 2007 – 2010
- Volkswagen: Passat B6 (3C) – 2007 – 2010
Service Regulations
| Maintenance type | Periodicity, km | Commentary |
|---|---|---|
| Oil service | every 15,000 km (7,500 recommended) | Oil: 5W-30, 5W-40 |
| Oil volume in the engine, l | 5.0 | Requires 4.6 liters for replacement |
| Transmission timing | chain | Service life is not limited, but in practice ~100,000 km |
| Valve thermal clearances | not required | Adjustment is performed by hydrocompensators |
| Oil filter replacement | 15,000 km | |
| Air filter replacement | 30,000 km | |
| Fuel filter replacement | 60,000 km | |
| Spark plugs replacement | 45,000 km | |
| Auxiliary belt replacement | 120,000 km | |
| Coolant replacement | 5 years or 100,000 km |
Design and repair of 1.8 TSI engines
The BZB engine was released in June 2007 and it belonged to the EA888 series, to the first generation of these motors. But there was still zero generation, the representative of which was the Volkswagen BYT engine, it was in production from January to June. Both of these motors replaced the 2.0 FSI and were designed almost from scratch. They use a closed cast iron cylinder block with two balancer shafts (block height 220 mm), with a steel crankshaft with 8 counterweights and a piston stroke of 84.2 mm, new lightweight pistons (height 29.8 mm), connecting rods 148 mm long, compression ratio reduced under the turbo to 9.6.
This block is covered by an aluminum 16-valve head with two camshafts. Valve diameters are 34mm intake, 28mm exhaust, with a 6mm stem diameter. A phase shifter is mounted on the intake shaft. The camshafts are rotated by the timing chain, which is claimed to be maintenance-free.
Direct fuel injection is used here, and the engine runs on a homogeneous mixture. The intake uses a manifold with variable geometry and vortex flaps. Unlike the 2.0 TFSI of the 113 series, new injectors with 6 atomizers are used here.
Blowing in 1.8 TSI turbine KKK K03, which is made together with the manifold, and the maximum boost pressure is 0.6 bar. BZB and BYT engines are controlled by Bosch Motronic MED 17.5. Both of these engines comply with Euro-4 environmental class.
Volkswagen BZB engine differs from BYT engine with a slightly modified valve cover, crankcase ventilation system, slightly lower oil pressure, slightly improved injectors, different cylinder-head gasket.
Characteristics of these motors do not differ: power 160 hp at 5000-6200 rpm, torque 250 Nm at 1500-4200 rpm.
In addition to the BZB, the first generation of 1.8 TSI includes Audi CABA, CABB and CABD engines, which were characterized by an adjustable oil pump.
The CABB and CABD engines are virtually identical to the BZB, while the CABA looks odd – 1.8 turbo and only 120 horsepower. The performance is like that of a regular atmospere, but the turbo allows for an even torque shelf early on, and the amount of torque is significantly more than the atmospere.
Technically CABA is a complete copy of CABB and CABD.
Together with these engines was produced and related 2.0 TSI of the 1st generation, as close as possible to the above-described engines.
The first generation 1.8 TSI was produced until 2010, but already in 2008 began to produce EA888 of the 2nd generation.
Disadvantages and problems of engines BZB (1.8 TSI 1st generation)
- Noises, metallic sound. Unfortunately, the Volkswagen BZB quite often stretches the timing chain and it happens after about 100 thousand kilometers. If nothing is done, there is an increased risk of chain jump with subsequent bending of valves.
- Relapse of the timing chain. The problem occurs on cars that have been left on a slope with the front side up. The jump occurs when starting. The malfunction was solved in 2010 by replacing the tensioner and the timing chain, but despite the replacement, the disease can still occur, although much less often.
- Swimming revs. Often it is a matter of encrusted valves, and the cause of this phenomenon is the direct fuel injection itself. It is necessary to check and clean. Another of the reasons is the vortex flaps, which over time are gassed, broken, the axle breaks, etc. Usually they are cleaned or the manifold is replaced with a working one or completely disconnected.
There was also a problem with the oil separator, which could be causing increased oil consumption. It was replaced with one like this 06H103495AD. In addition, every 90 thousand kilometers it is prescribed to change the plugs, oil is better to change 2 times more often than the regulations, and use only high-quality working fluids.
Despite the above problems, these are not the worst engines of all Volkswagen 1.8 TSI, their resource exceeds 250-300 thousand kilometers, with very adequate maintenance.
Tuning engines 1.8 TSI BZB
Chip tuning
Control unit firmware (the so-called Stage 1) allows you to get up to 220 hp without problems and about 340 Nm of torque. Exactly the same figures can be obtained by conventional firmware of the 120 hp CABA engine.
With a front intercooler, cold intake, downpipe and Stage 2 firmware, you can swing up to 240-250 hp and get up to 380 Nm of torque.
You can go further and do Stage 3. For this purpose APR turbo kits are sold on the basis of K04 turbine and components from Audi S3 (intercooler, injectors, coils, K04 turbine), as well as APR intake, exhaust on 76 mm pipe without catalytic converters and with appropriate tuning. This will allow you to get up to 350 hp (300-320 hp no problem), but turbo lag will increase significantly and at low revs your BZB will not pull as well as the standard K03.
ENGINE RATING: 4