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2.0T Engine: the TFSI 2005.5 and Later

Gear case (3)Worth mentioning is that the 2.0T engine comes in two flavors. The early versions are belt driven motors with very well designed balance shafts. The next series is a timing chain design, and suffers far less issues with both the engine and the fuel injection system. It is easily identifiable by the oil filter on top of the motor near the valve cover.

This short page is mostly just a Link Bucket. Most of what needs to be said about this motor is rather lengthy. The importance of the information cannot be overstressed. Between the fuel system failures, the oil consumption, and the potentially motor killing carbon buildup, we may have a series of 2.0T engine cars destined to ding the Audi reputation pretty hard. The repairs are more common than most stereotypic issues on other motors and models. And the repairs are quite expensive. And the repairs are very likely avoidable in the majority of the cases.

TFSI Injection System on the 2.0T Engine

The TFSI injection system is another step forward in technology. But it is accompanied by a host of ghosts that plague a customer’s car and wallet. Bad fuel pumps, and damaged camshafts & lifters for the high pressure pump are common. There are a few other not so common issues.

Gear case (2)Karmakanix Knowledgebase Information on TFSI Injection

2.0T Camshaft and Lifter For High Pressure Fuel Pump

Starting with occasional misfires and ending with the car coming to a halt, camshaft damage will stop the engine dead. The extra lobe for the high pressure fuel pump can wear out rapidly.

Gear case (2)Karmakanix Knowledgebase Information about the camshaft failure problem

2.0T Oil Consumption Issue: PCV & Carbon Buildup

This 2.0T engine has proved to be the oil consumer king of this century. It appears to be due to the PCV system seeping. PCV means both Positive Crankcase Ventilation and Pressure Control Valve, and when it seeps the engine uses oil two different ways. The inevitable consequence is a larger buildup of carbon, even using the best fuel. And that carbon will cause misfire problems, and may bring you car to a halt.

Gear case (2)Karmakanix Knowledgebase Information about the relation between oil consumption and carbon buildup

2.0T Carbon Cleaning and Diagnosis

Should your engine use oil and carbon up until it runs wrong, this is the procedure we use to diagnose and repair or to decarbonize your motor.

Gear case (2)Karmakanix Knowledgebase Information on how the carbon problem is diagnosed and cleaned

Gear case (3)