• Hi Guest!
    If you appreciate British Car Forum and our 25 years of supporting British car enthusiasts with technical and anicdotal information, collected from our thousands of great members, please support us with a low-cost subscription. You can become a supporting member for less than the dues of most car clubs.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

Does a BJ 8 need a vented fuel cap?

Share this page

D

DavidThorn

Senior Member
Country flag
Offline
Hopefully an easy question - I have acquired a lockable fuel cap for my late BJ 8 but unlike the old cap I had it seems to be a sealed fit and has no apparent vent.

Am I in danger of creating and air lock or vacuum in the fuel system if I use it ?
 
Fuel tank is vented to the outside using a small black flexible tube connected to the metal filler pipe inside the boot and then the flexible tube is routed down through the floor to the out side.
 
Last edited:
DavidThorn said:
Hopefully an easy question - I have acquired a lockable fuel cap for my late BJ 8 but unlike the old cap I had it seems to be a sealed fit and has no apparent vent.

Am I in danger of creating and air lock or vacuum in the fuel system if I use it ?
Click to expand...

It's not a modern sealed cap, is it? You could put it up to your mouth and blow through the lock.
 
DavidThorn said:
Hopefully an easy question - I have acquired a lockable fuel cap for my late BJ 8 but unlike the old cap I had it seems to be a sealed fit and has no apparent vent.

Am I in danger of creating and air lock or vacuum in the fuel system if I use it ?
Click to expand...

Yes, it requires a vented cap.
 
Back
Top