AUDI A4 TURBOCHARGER FOR SALE

Defects at Audi A4 turbochargers

• Turbo smokes blue
• Turbo smokes black
• Lack of power
• Turbo rattles
• Turbo whistles

Signs of malfunction of the Audi A4 turbocharger

• The engine power breaks down abruptly
• Under load, whistling sounds come from the engine compartment
• The vehicle smokes when it starts in the morning
• The vehicle smokes heavily
• The engine has no more power
• There is a blowing sound to hear
• There is an oil smell in the vehicle area
• Under certain operating conditions rattling noises from the turbocharger

Faults in Audi A4 turbochargers

• Wear or contamination of the VTG adjustment
• Overspeed damage as a result of defective charge air hoses or intercoolers
• Foreign objects were sucked in by the compressor wheel
• A foreign object has damaged the turbine wheel
• The bearings are detective
• The seal of the turbocharger is defective
• The wastegate control is defective
• The VTG control is defective
• The boost controller failed

Diagnosis on the Audi A4 turbocharger

The diagnosis of turbocharger faults is expensive. With a few tricks, you can do most of the tests yourself.

• The most complex but also the most important test is the preassure test of the entire boost pressure system. In this case, a pressure of approx. 1 bar is built up via the turbocharger intake by means of a adapter. Leaks can be localized mostly directly and safely.
• Checking the shaft play and visual inspection of the compressor wheel. To do this, the intake must be removed in front of the turbocharger. Then you can easily move the shaft of the turbocharger in the radial and axial direction with your fingers. When the compressor wheel touches the housing, the shaft play is already considerably too large. The blades of the compressor wheel must be complete and without any damage.
• Checking the boost pressure control system. If the turbocharger is equipped with a pneumatic actuator, the actuator must be checked for leaks to ensure the function of the diaphragm. For this purpose, a vacuum can be applied. For electric actuators, we recommend an actuator test on a motor diagnostic device.

The repair of the old Audi A4 turbocharger

If you have decided to repair your old turbocharger, we can help you determine the cause of failure of the turbocharger based on the damage This is helpful so that you enjoy your investment long after the turbocharger has been replaced.

The replacement of the Audi A4 turbocharger

It is imperative to replace all defective parts and lines in the vicinity of the turbocharger and to change the engine oil at the vehicle. The oil supply line is obligatory to exchange. The charge pressure lines must be in perfect condition to avoid overspeeding the turbocharger. Renew all required seals located at the turbocharger manifold. Fill the oil inlet on the turbocharger with an oil can. During installation, also observe the installation instructions of the manufacturer.