bmw Workshop Repair Guides

BMW Workshop Service and Repair Manuals

8 RA Checking Filler Cap Pressure Relief Valve > < 7 RA Conducting Leak Test On Fuel Tank And Tank Ventilation System
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The leak test can be carried out with a leak detector. Follow
manufacturer's operating instructions in doing so.

Possible causes of leaks are:

- Tank cap leaking (check tank cap pressure relief valve).

- Tank venting lines leaking (fuel tank - carbon canister - tank
venting valve).

- Tank ventilation valve leaky (engine compartment)

- Fuel level sensor flange on tank leaking

RA  Conducting leak test on fuel tank and tank ventilation system

BMW AG - TIS

13.02.2013  06:07

Issue status (12/2007) Valid only until next DVD is issued

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8 RA Checking Filler Cap Pressure Relief Valve > < 7 RA Conducting Leak Test On Fuel Tank And Tank Ventilation System