Blitz fuel tank switch sucks air

[Richard Farrant]

Originally Posted by zemsi

Hi Richard

Thanks for the hint. Unfortunately, both tanks are full and it happens despite that.

cu
Chris

OK Chris,
Then it is drawing air through the spindle then. I was thinking it might be drawing from the unused tank as in instances from experience. as said previously, lap the taper tap in with a fine paste, like used for cleaning alloys, etc. One well known brand is Solvol Autosol.
Richard

[Mike Cecil]

I used valve grinding paste: it comes in various grades from coarse to fine, so start with coarse on a badly scratched spindle, and, as Richard said, lap them together till 'Bearing Blue' leaves no or little sign when the tap is put together and rotated.

I also used a modern rubber 'o' ring when reassembling mine, and it worked OK for years after that. The key seems to be (1) an even, fine fit between the spindle and body and (2) good tension on the spring to keep them tight.

Regards

Mike C

[Ganmain Tony]

Chris, not trying to be condesending...but lap means - to grind (finely) the surfaces between the the feul tap and the body of the fuel tap it sits in.

It makes both surfaces sit evenly against each other thus preventing a fuel leak. As Mike has suggested, valve grind paste should work well.

Doing this should provide a pretty good seal. It may still weep a fraction initially but should "Take up" after a while and stop leaking.

[Richard Farrant]

Originally Posted by Ganmain Tony

Chris, not trying to be condesending...but lap means - to grind (finely) the surfaces between the the feul tap and the body of the fuel tap it sits in.

It makes both surfaces sit evenly against each other thus preventing a fuel leak. As Mike has suggested, valve grind paste should work well.

Good call, Tony. We take these tasks for granted, I mentioned polishing paste, only to finish off or if the fit was not bad enough to require use of a fine valve grinding paste.

[Tony Smith]

And to answer the other part of your question, Chris, the taps are available NOS from Dirk Leegwater as Ford C11Q-9285 & C011D-9287.

Your F15 would still be under warranty, wouldn't it?

[Mike Cecil]

Not sure Tony, I think the Aussie rebuilder only gave a concrete warranty: once it's off the concrete, the warranty expires. Or was that a '12-12' warranty: 12 inches of forward movement or 12 minutes......??

Mike C

[Ganmain Tony]

Originally Posted by Richard Farrant

OK Chris,
Then it is drawing air through the spindle then. I was thinking it might be drawing from the unused tank as in instances from experience. as said previously, lap the taper tap in with a fine paste, like used for cleaning alloys, etc. One well known brand is Solvol Autosol.
Richard

And I should have acknowledged your post as well Rich. I think its fair to say you do do a fair bit more of this kind of stuff than me...