Charge Air System, Checking For Leaks: Procedure
-- Loosen the hose clamps -1 and 2- and remove the air guide pipe.
-- Connect the :VAG1687/10 with the :VAG1687/14 to the turbocharger.
-- Connect the :VAG1687 to the adapter.
Prepare the :VAG1687 as follows:
-- Pull the pressure regulating valve -2- upward and remove completely, close the valves -3 and 4-.
-- Connect the :VAG1687 to compressed air -1- with a commercially available adapter piece.
If there is water in the viewing glass, it must be drained through the drain plug -6-.
Pressure must not exceed 0.5 bar (7.2 psi)!
-- Open the valve -3-.
-- Set the pressure to 0.5 bar (7.2 psi) using the pressure control valve -2-.
-- Open the valve -4- and wait until the test circuit is filled. Regulate the pressure to 0.5 bar (7.2 psi) again if necessary.
-- Listen, feel and use commercially available leak detection spray or the :VAG1842S to check the charge air system for leaks.
A small quantity of air dissipates via valves in engine. A pressure retention test is not possible for this reason.
Information on the :VAG1842S . Refer to the Operating Instructions.
Release the pressure in the test circuit by pulling off the hose coupling before removing the adapter.