​Audi Diesel Engine Repair in Espoo

​​Modern diesel engines have numerous advantages: immense torque, fuel efficiency, durability, and more. Additionally, they haven't faced the issues of gasoline engines, such as timing chain stretching or skipping. However, overall, diagnosing and restoring TDI engines require a higher level of expertise from mechanics and a comprehensive set of specialized tools.

Common Issues

Many Audi diesel engines are equipped with the high-pressure fuel pump VR-44 from Bosch. This component features electronic control, two-stage injectors, and a control unit for adjustment valves. All such fuel injection pumps (TNVD) are lubricated by fuel. If you decide to save on fuel and use low-lubricating fuels, you risk causing mechanical damage to the fuel pump.
Similar damage can result from the presence of air or condensate in the system for an extended period. Identifying the cause of the malfunction might not even require diagnostics. The problem is expressed by:
difficult engine starting (especially when the fuel is already hot),
poor acceleration dynamics,
increased smoke emission.
Repairing the fuel injection pump requires specialized equipment from the manufacturer, specifically from Bosch. These pumps have very few external adjustments and can only be serviced at an auto repair shop.

Owners of Audi diesel vehicles also frequently encounter issues with sensors and engine control mechanisms. For instance, the air mass flow sensor often malfunctions. Most commonly, this breakdown occurs due to the contamination of the sensor's sensitive element. This happens as follows: after the engine is turned off, an oily mist rises through the crankcase ventilation system and settles on the sensitive element of the air throttle. This leads to a breakdown, and these components need replacement as the malfunction affects the engine's power.

Preventive Measures and Diagnostics

To reduce the likelihood of powertrain failures, we recommend carefully selecting maintenance consumables. For example, all TDI series engines are highly sensitive to oil quality. Failure to change the oil in a timely manner and the use of low-quality oil can quickly wear down the timing chain.

If your Audi's engine has malfunctioned, visit our auto repair shop in Espoo. We will fix any problem:
a) professionally,
b) quickly,
c) at reasonable prices.