Checking charge air system for leaks

Special tools and workshop equipment required

• Charge air system tester - V.A.G 1687-
• Adapter - V.A.G 1687/10-

• Remove intake hose -1- from air filter.
• Insert adapter - 1687/10- -1- into intake hose and secure with a clip.

Prepare charge air system tester - V.A.G 1687- as follows:

• Unscrew pressure control valve -2- completely and close valves -3- and -4-.

• Connect charge air system tester - V.A.G 1687- to adapter - 1687/10- as shown.

• Connect compressed air hose -1- (compressed air supply) to charge air system tester - V.A.G 1687-.

• Open valve -3-.
• Adjust pressure to 0.5 bar with pressure control valve -2-.

• Open valve -4- and wait until test circuit is full. If necessary, regulate pressure to 0.5 bar.
• Check charge air system for leaks by listening, touching, with leak detector spray or using ultrasonic tester - V.A.G 1842-.