Charge Air System, Checking For Leaks
Special Tools And Workshop Equipment Required
- Turbo System Tester Kit :VAG1687
- Ultrasonic Tester :VAG1842S
Required Preliminary Work. Refer to CHARGE AIR SYSTEM, CHECKING FOR LEAKS [CLAB, CLAA, CDUC, CGQB, CKVB, CKVC, CDUD, CPNB, CTCB, CTCC, CVUA, CVUB ENGINES] and/or CHARGE AIR SYSTEM, CHECKING FOR LEAKS [CYNB ENGINES] .
-- Follow the guidelines for clean working conditions. Refer to GUIDELINES FOR CLEAN WORKING CONDITIONS .
Prepare the :VAG1687 as follows:
-- Completely remove the pressure regulating valve -2- and close the valves -3 and 4-.
- The knob must be pulled upward in order to turn the pressure regulating valve.
-- 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-.
- Never Set The Test Pressure Specified.
-- Set the pressure to 0.2 bar (2.9 psi) using the pressure control valve -2-.
-- 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 :VAG1842S to check the charge air system for leaks. Refer to the Owner's Manual for information on using the :VAG1842S .
TIP:
A Small Quantity Of Air Dissipates Via The Valves In The Engine. For This Reason A Pressure Retention Test Is Not Possible.
ASSEMBLING
-- Release the pressure in the test circuit by removing the hose coupling before removing the adapter.
Additional Procedures. Refer to CHARGE AIR SYSTEM, CHECKING FOR LEAKS [CLAB, CLAA, CDUC, CGQB, CKVB, CKVC, CDUD, CPNB, CTCB, CTCC, CVUA, CVUB ENGINES] and/or CHARGE AIR SYSTEM, CHECKING FOR LEAKS [CYNB ENGINES] .