Charge Air System, Checking For Leaks
Procedure
Depending on the model, preliminary work may be required. Refer to CHARGE AIR SYSTEM, CHECKING FOR LEAKS .
Prepare the Turbo System Tester Kit:V.A.G 1687 as follows:
-- 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 Turbo System Tester Kit:V.A.G 1687 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.
-- Check the charge air system for leaks by listening, feeling, and using commercially available leak detection spray or the Ultrasonic Tester:V.A.G 1842S . Refer to the appropriate Service Information 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.
- Secure all hose connections with hose clamps that match the ones used in series production. Refer to the appropriate Electronic Parts Information.
Assembling
Assembly is performed in reverse order.
There may be additional procedures depending on the model. Refer to CHARGE AIR SYSTEM, CHECKING FOR LEAKS .
Tightening Specifications