Volkswagen Golf Mk7 Service & Repair Manual: Checking charge air system for leaks

Using charge air system tester -V.A.G 1687-, this page covers pressure-testing the Volkswagen Golf Mk7 charge air system for leaks — release the air pipe hose clips first for adapter connection.

Special tools and workshop equipment required

Charge air system tester -V.A.G 1687- Procedure

–  Release hose clips -1- and -2-, and remove air pipe.

–  Connect adapter -V.A.G 1687/15- with adapter -V.A.G 1687/11- to turbocharger. –  Connect hose -1- of charge air system tester -V.A.G 1687- to adapter.

Prepare charge air system tester -V.A.G 1687- as follows: –  Unscrew pressure control valve -2- completely, close valves -3- and -4-. To turn the pressure regulating valve -2- the knob must be pulled upwards. –  Connect charge air system tester -V.A.G 1687- to compressed air -1- via commercial adapter.   Note If there is water in the sight glass, drain at water drain screw -6-. –  Open valve -3-. Risk of damage to engine Risk of damage because pressure is set too high. The pressure must not exceed 0.5 bar! –  Adjust pressure to 0.5 bar with pressure control valve -2-. –  Open valve -4- and wait until test circuit is full. If necessary, readjust pressure to 0.5 bar. –  Check charge air system for leaks by listening, touching, with commercially available leak detector spray or using ultrasonic tester -V.A.G 1842-.   Note A small amount of air escapes through the valves and enters the engine. Therefore a holding pressure test is not possible. How to use the ultrasonic tester -V.A.G 1842- → operating instructions Before removing the adapter, release pressure in the test circuit by pulling off hose coupling. Installation is carried out in the reverse order; note the following:   Note Renew seal and O-rings. Specified torques → Fig. „“Installing air ducts with screw-type clips”“

Questions & answers

Checking charge air system for leaks — Volkswagen Golf Mk7

How do I check the Golf Mk7 1.4 TSI charge air system for leaks?

Pressurise the system with a charge air tester and listen/feel for leaks at hose connections, intercooler and throttle body.

Removing and installing charge air cooler

Special tools and workshop equipment required     Hose clamps up to 25 mm -3094-   ...

Mixture preparation system, electronic inj., Gas

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Other materials:

• Removing and installing charge pressure sender -GX26-
• Removing and installing charge air cooler
• Assembly overview - charge air system
• Overview of fitting locations - operating and display unit, air conditioning system with electric/manual controls
• Checking fuel pressure