Pressure Line Leak Test

13 53 ... Pressure Line Leak Test







WARNING:
- Risk of burning.
- Rotating components (risk of injury)







Necessary preliminary work:
- Remove intake silencer housing.
- Bring engine up to operating temperature.







IMPORTANT:
Air bubbles form continuously in the event of a leak.
Static air bubbles indicate that there is no leak. They may be caused by the leak detector spray or when the leak detector agent liquifies.







Picture shows N14
Apply leak detector spray* in area of screw connection (1) of pressure line (2).
* Sourcing reference: BMW Parts Department
Repeat procedure several times and check for bubbles with telescopic mirror in the entire screw connection area (1).







NOTE:
In case of tightness:
- Assemble engine
- Read out fault memory, clear if necessary.
In event of leakage:
- Replace both components at leak
- Repeat leak test after replacing components