CDAB engine: specifications, device, resource, principle of operation, advantages and disadvantages, owner reviews

Table of contents:

CDAB engine: specifications, device, resource, principle of operation, advantages and disadvantages, owner reviews
CDAB engine: specifications, device, resource, principle of operation, advantages and disadvantages, owner reviews

In 2008, VAG group cars entered the automotive market, equipped with turbocharged engines with a distributed injection system. This is a 1.8 liter CDAB engine. These motors are still alive and actively used on cars. Many are interested in what kind of units these are, are they reliable, what is their resource, what are the advantages and disadvantages of these motors.


The EA888 series motors are over a decade old, having first entered the market in 2007. The series, developed by Audi engineers, soon began to be used by Volkswagens. There were enough options for the execution of these power units, but with regards to volumes, there were only two. These are 1.8 TSI and 2.0.

Engines were equipped with direct injection, as well as a piping system. There were no atmospheric engines of this series, just as there were no ordinary distributed injections.

Car owners happy and warmmet these units. They were able to replace the EA113 series, already honorable by that time, which is known for its five-valve 1.8 T engines. The production of CDAB engines continued until 2013, and then the new 1.8 TSI of the third generation came to replace it.

What's new?

Manufacturers in this version of the engines used a different cylinder honing technology, the diameter of the crankshaft main journals decreased. New pistons and rings of a new design are also installed, there is a new vacuum type pump, and the oil pump is adjustable. Instead of the traditional 1 lambda probe, VAG introduced another lambda into the CDAB 1.8 TSI engine. According to environmental standards, the unit fully complies with all Euro-5 standards.

As for everything else, there are no more changes, but even this was enough to change the reliability of the design.

cdab 1 8 tsi engine
cdab 1 8 tsi engine


The cylinder block is traditionally made of cast iron. A direct injection power system is used. There are four valves for each of the four cylinders. Power can be different - 160 horsepower in the range from 4500 to 6200 rpm. Torque is 230 Nm at 1500 rpm. The CDAB engine is designed to be powered by 95m gasoline. The manufacturer claims that fuel consumption is 9.1 liters in urban conditions and 5.4 liters on the highway.

Which cars were fitted with 1.8 CDAB

Most European automakers have been offering potential buyers since 2009these units. The motor can be seen not only on Volkswagen, but also on Scoda main models. Engines are also found on domestic cars.

Injection system device

The power system in this power unit is very similar to the power system of a diesel engine. The system device also contains an ECU, fuel injectors, high and low pressure lines, a tank, filters, a bypass valve, a pressure regulator, a fuel rail, numerous sensors, an injection pump and a low pressure pump.

The main feature is the control of the way the fuel is sprayed and the injection time. The engineers achieved this with a competent approach to the development of the ECU control program. In all other respects, the power system does not differ from the traditional one for most other motors.

cdab engine 1 8
cdab engine 1 8

Twin Turbo

Units built on TSI technology have won the title of "Engine of the Year" more than once. This is due to the combination of a mechanical compressor and a turbine.

Here lies the basic principle - the distribution of air flows. By changing the air flow rate and the amount of air supplied, the quality of the mixture in the engine cylinders is regulated. Depending on the crankshaft speed and throttle position, several boost control algorithms can be distinguished, which are implemented in the CDAB tsi engine.

So, up to a thousand revolutions, the motor runs without boost. Air is drawn into the engine by the movement of the cylinders. When the crankshaft spins up to 2400 rpm,then the mechanical compressor is switched on. The electromagnetic clutch uses two rotors. One sucks in air, the other pressurizes the intake tract.

When you sharply press the gas in the speed range from 2400 to 3500 rpm, the turbine is also included in the work. At higher speeds, only the turbine remains to work, and the compressor stops working.

The main element in this system is a special damper that redistributes the air flow between the turbine and compressors. The damper is controlled by a servomotor. There are a number of sensors to control the damper.


According to the manufacturer, the resource of this power unit is from three hundred to five hundred kilometers without major repairs. But here the manufacturer makes a note invisible to the eye - the resource will be the same if the oil is changed on time. But life and exploitation shows something else.

Regular patient services

The CDAB 1.8 TSI engine is popular not only with car enthusiasts, but also with service specialists. This patient is a particularly frequent visitor to the service station. The fact is that the manufacturer, despite advanced technologies, issued a practically stillborn unit. Many people remember high-profile scandals with increased oil consumption and poor reliability.

Features include cast iron cylinder block, aluminum cylinder head, timing chain drive, oil pump and balancer shafts. There is a mechanism for adjusting the phases at the inlet. There is a modification with phase adjustment and at the outlet.

As it was beforenoted, direct injection with a mechanical injection pump, which is driven by a camshaft cam. The pump is driven from the balancer shaft by a drive belt. The pump is one unit with a thermostat.

cdab engine tsi
cdab engine tsi

Patient history

The popularity of the car with the CDAB 1, 8 engine was very high at first. Owners in past years have bought a longer chain life in the timing compared to traditional belts. In addition, VAG emphasized the most reliable injection system and a simplified cylinder head design.

But it took a couple of years for this euphoria to pass, as if it had never existed at all. CDAB engines had all the same problems as the previous generation. But now, premature wear of the drive chain, breaks in the oil pump chains have been added to this bouquet - especially in winter. And yes, the engine had exorbitant oil appetizing. In addition, the owners in the reviews note the unimportant operation of the crankcase ventilation system, the camshaft cam, from which the high-pressure fuel pump worked, was often ground off, there were problems with starting in winter.

And let VAG solve these problems in the next generation, even on new engines chains sometimes break, oil appetite appears, the resource is small initially.

cdab engine repair
cdab engine repair


The first units from the EA888 family were not so bad. But in 2008, CDAB came out into the world, the most massive version, which delighted the owners with huge volumes of oil consumed. Moreover, the manufacturer was not particularly willing to producerepair of the CDAB 1.8 engine under warranty. So about two years passed, and it became impossible not to notice the “maslozhor”. Engineers began to investigate the causes of increased oil consumption.

Compression rings on CDAB became thinner, the oil scraper ring was only one and a half millimeters thick. Drainage of grease from the oil scraper ring was to be carried out through the holes on the piston. The manufacturer planned that in this way about five percent of fuel would be saved by reducing the friction of the parts of the piston group. But in fact, the oil consumption in these engines only grew, and, as a result, the catalysts failed.

Expert tales that all turbocharged engines consume oil did little to help the evil consumer. Consumption is sure to be, but not a liter per 1000 kilometers. The plant recommended the repair of the 1.8 TSI CDAB engine in the form of installing pistons from the previous revision. This really solved the problem a little if there was no wear on the parts of the cylinder-piston group.

Further, in the new versions, the manufacturers replaced the pistons, the thickness of the wheels increased, again, they had holes for draining the oil. However, the "little glutton" has not gone away. It now began to appear later - the owner had enough time to choose oils and change intervals. And the increased oil consumption for turbocharged 1, 8 is inevitable, as inevitable as taxes or death. It was no longer possible to replace the pistons in the new version with the old ones, or rather, it is possible, but with the replacement of the connecting rods.

engine repair cdab 1 8
engine repair cdab 1 8

Bought a problem car

What to do in this case - exactlythis is of interest to car owners. After all, replacing the CDAB engine is not a panacea, and it is expensive.

Original pistons, if you check them by codes, are made by Mahle. However, this is far from the only manufacturer of piston group parts. Pistons are also manufactured by Kolbenschmidt - the KS40251600 series is needed. These pistons have slots to drain grease. The oil scraper ring on this piston is type-setting, and you need to pay attention to this. Installing these pistons will partially solve the problem. Repair of the CDAB engine in this way will cost from 4,500 rubles. This is the cheapest option to temporarily cure a small bug.

cdab engine replacement
cdab engine replacement


In general, a normal and popular engine, but it has a lot of drawbacks, and the main one is increased oil consumption. Many owners in the reviews say that a liter per 1000 km is far from the limit. There are more numbers. The higher the mileage, the higher the consumption. On average, a motor in normal condition should “eat” about 1.5 liters of oil per 10,000 km. Also, the unit is very picky about fuel - this is also partly the cause of increased oil appetites. At the same time, oil consumption in itself does not affect engine performance in any way. Another weak point is the turbine. If we analyze all the breakdowns in this engine, then they are all associated with the turbine.

Also, the cost of repairs is a disadvantage. It is associated with the presence of specialized equipment at the service station - the tightening torques of the CDAB engine must be observed very accurately, an endoscope and other things are needed for Otherwise, the motor is quite reliable.


Almost all motorists who have encountered this power unit have felt its shortcomings and bypass the second generation 1.8 TSI. And those who have not been touched by the “maslozhor” are sure that this is a reliable and quite good engine in terms of its technical characteristics. In case of increased oil appetite, the owner will only have to replace the pistons, and when buying a used car, you can check the seller’s words about the replaced pistons with an endoscope. At the very least, owners and potential owners will understand what and how this engine is doing and why it “eats” oil like that, and how to treat it.

The appearance of the motor
The appearance of the motor

Experts recommend purchasing oil only from official representatives - so there is less risk of acquiring a fake. Specialists from well-known service stations recommend changing the oil not by mileage, as the manufacturer says, but by engine hours. The decision to change the oil should be made based on the average speed on the on-board computer. According to Moscow traffic jams, the oil will work out its prescribed 250 hours after five thousand kilometers. Just in case, it is not recommended to refuel the car at Gazpromneft. And then the engine will say "thank you very much" to its owner, but this is not accurate.