Charge Air System, Checking For Leaks

Special tools and workshop equipment required 

• Turbo System Tester Kit:VAG1687 
• Turbo System Tester Kit - Adapter 10:VAG1687/10 

Procedure 

Depending on the model preliminary work may be required. Refer to CHARGE AIR SYSTEM, CHECKING FOR LEAKS .

-- Connect the :VAG1687/10  on the air duct pipe -1-.

Fig 1: Identifying Turbo System Tester VAG1687

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-- Connect the :VAG1687  to the adapter.

Prepare the :VAG1687  as follows:

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-- Completely remove the pressure regulating valve -2- and close the valves -3 and 4-.

• Pull the knob in order to rotate the pressure regulating valve -2-.

-- Connect the :VAG1687  to compressed air -1- with a commercially available intermediate piece.

-- Drain the water in the viewing glass via the water drain plug -6-.

-- Open the valve -3-.

-- Set the pressure to 0.2 bar (2.9 psi) using the pressure regulating valve -2-.

• Pressure must not exceed 0.2 bar (2.9 psi)!

-- Open the valve -4- and wait until the test circuit is filled. Regulate the pressure to 0.2 bar (2.9 psi) again if necessary.

-- Listen, feel and use commercially available leak detection spray or the :VAG1842  to check the charge air system for leaks. Refer to the Operating Instructions for handling.

TIP: 

A small quantity of air dissipates via the valves in the engine. For this reason a pressure retention test is not possible.

• Release the pressure in the test circuit by pulling off the coupling before removing the adapter.

Additional procedures. Refer to CHARGE AIR SYSTEM, CHECKING FOR LEAKS .