Leaking fuel cap

[NJR 34GTT]

Guys does anyone know how I can test where the fuel is leaking from out of my fuel cap/filler area?

It's going to start marking the paint if I don't get it sorted soon.

I've been stuck to just not filling it up because if its over 3/4 and I go hard around a few corners I get a few dribbles of fuel down the side of the car. This is quite annoying having to fill up constantly.

I'm thinking it's either the cap itself needs an o-ring or the actual fuel filler neck has come loose and is somehow leaking.

Any thoughts?

[Jay95R33]

Ahh, it's a regular problem. The same problem of seeing petrol fumes come out of the fuel lid even when the cap is on tight...

When they comply the cars they have to put a new (smaller) filler neck in, and half the time they don't seal it properly

When yo get a chance pull the filler neck out and seal up around the outside of it with sikaflex or silicon (not sure how the petrol will affect the silicon) and that should fix it..

J

P.S. - I'll give you a ring tomorrow about that wiring

[r33skylinegtst]

there's a few threads on this because people wanted that psssshhh noise when you unscrew the fuel cap and they weren't getting it. Try searching the forums, i think someone said they are generic amongst newer Nissans and that one from a Pulsar will fit, but don't quote me on that. Run a search and see how you go.

[NJR 34GTT]

Yeah I read those posts but they never actually described or explained how to tell if it was the filler neck or the cap that was the problem. Thanks though.

Jay, no worries.

[Sinista32]

Talk sternly to the pit crew as I think there splashing it on when you come in to the pits.

But seriously I'd follow Jay's advice

[muimui]

Guys does anyone know how I can test where the fuel is leaking from out of my fuel cap/filler area?

It's going to start marking the paint if I don't get it sorted soon.    

I've been stuck to just not filling it up because if its over 3/4 and I go hard around a few corners I get a few dribbles of fuel down the side of the car. This is quite annoying having to fill up constantly.    

I'm thinking it's either the cap itself needs an o-ring or the actual fuel filler neck has come loose and is somehow leaking.

Any thoughts?

that is a common problem, only way to fix it , is pull the upper fuel neck out, pull the add on filler off, machine the internal of the original filler then fit the new filler back in by welding. but better get a workshop do it.

[muimui]

also, check the filler cap as well, as some time, the new filler cap height is longer than the filler, then the rubber o ring not seal up properly with the filler. if that is the case, use a original nissan filler cap, or modify the new cap will fix the leaking problem.

[elbee111]

The Sikaflex trick.

[NJR 34GTT]

Thanks for the pic, I think I'm gonna sikaflex the sucker and get an O-ring to put in the top of the fuel cap and hopefully that fixes it.

Now where the hell in Canberra would I get an appropriate O-ring? I presume bunnings etc would sell the sikaflex?

[Mark]

The slaz should be enough, or you can just buy some vac hose and wrap it around. Only $3 a metre