Charge Air System, Checking For Leaks: Notes

Special Tools And Workshop Equipment Required 

• Turbo System Tester Kit:VAG1687 
• Turbo System Tester Kit - Adapter 11:VAG1687/11  and Turbo System Tester Kit - Adapter:VAG1687/14 
• Ultrasonic Tester:VAG1842 
• Leak detection spray, commercially available

Procedure 

-- Pay attention to the guidelines for clean working conditions. Refer to GUIDELINES FOR CLEAN WORKING CONDITIONS - Engine .

-- Remove the air filter housing. Refer to AIR FILTER HOUSING, REMOVING AND INSTALLING .

-- Connect the :VAG1687/11  with the :VAG1687/14  to the turbocharger.

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-- Connect the hose -arrow- from the :VAG1687  to the adapter.

Prepare the :VAG1687  as follows:

Fig 1: Connecting Pressurized Air Hose To Testing Unit For Turbo Charger V.A.G 1687

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

• The knob must face upward so the pressure regulating valve can be turned.

-- 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-.

-- Open the valve -4- and wait until the test circuit is filled. Regulate the pressure back to 0.2 bar (2.9 psi), 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 Owner's Manual.

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 removing the hose coupling before removing the adapter.