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R33 Fuel Caps. No 'PSHHHHHHHH" on opening!!??

superspit
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superspit Mentor

superspit

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Hi,

STANDARD FUEL CAPS. I don't think mine is the right one. Even though it says Nissan on it, it doesn't seem to keep pressure in the tank at all.

I have determined this from not hearing any 'pshhhhhhhhhh..' sound when I undo the cap. I swapped over the cap with my mum's S13 Silvia, and still no 'built-up-pressure' sound at the petrol station.

Also, if the conditions are 'right', I can see that hazy petrol 'vapour' pouring from the fuel flap, and sometimes the smell inside the cabin is quite bad, (girlfriend hates it...I do too). I am wondering if this could be causing the smell inside my car. All else looks OK, no leaks..etc. Cars performance seems ok (seems!!!).

I know the car has been involved in a 'rear' accident in Japan. (How bad? ...Don't know)

Is there an 'identifier' on the cap that clearly states it to be R33 specific?

Thanks,

Mark.

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superspit Mentor

superspit

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please keep responses coming....I need a definate answer for this one...I'm loosing brain cells thru the fumes!! I'm sure it's got something to do with the cap, and maybe 'blow-back'.

thanx!!

Keegs Grand Master

Keegs

Posted
Posted

mine is the same, the r33 cap on my car has holes on it if you detatch the cap part from the screw in part...(lol hard to explain) There are holes in the screw in part which i imagine vent out pressure, why I dont know, you can buy new ones from workshops or websites though and im sure it will fix your problem.

superspit Mentor

superspit

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mine is the same, the r33 cap on my car has holes on it if you detatch the cap part from the screw in part...(lol hard to explain) There are holes in the screw in part which i imagine vent out pressure, why I dont know, you can buy new ones from workshops or websites though and im sure it will fix your problem.

Jimbo seems to have the right noise... I know my cap works on the S13 Silvia, but not the other way around. (by working I actually mean making the pressure noise on unscrewing)

Surely there must be some consistancy here?

Thanx 33NIZ,

Mark

superspit Mentor

superspit

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  • Author
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please keep responses coming....I need a definate answer for this one...I'm loosing brain cells thru the fumes!! I'm sure it's got something to do with the cap, and maybe 'blow-back'.

thanx!!

sewid Grand Master

sewid

Posted
Posted

All Nissan fuel caps are (should?) be the same. Hence you can buy a "Nismo" branded fuel cap and it will fit on any Nissan.

This also makes mass production of the part cheaper which makes sense.

My cap does not make a pressure release type noise and I do not smell any fuel vapour inside the car.

superspit Mentor

superspit

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  • Author
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All Nissan fuel caps are (should?) be the same. Hence you can buy a "Nismo" branded fuel cap and it will fit on any Nissan.

This also makes mass production of the part cheaper which makes sense.

My cap does not make a pressure release type noise and I do not smell any fuel vapour inside the car.

Thanx SEWID...

Production technique Seems Logical, inconsistency in other's standard fuel cap's isn't.

Ta.

superspit Mentor

superspit

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it's not the actual plastic cap, but the hunk of metal the cap srews into, was not sealed when it was changed over at compliance...

u have to get one the right size, and then seal it somehow... dont use silicone though.

AH HAH!!!..........now that u mention it Z, my filler spout does look new (and dodgy) and aftermarket.

..........mmmmmmmmmmmm

WOT 2 DO ???????

Thanx sooo much Zahos!!

Keep em coming in everyone!!!!!!!!! this is interesting stuff...starting to make sense a little....

CroatianR33 Collaborator

CroatianR33

Posted
Posted

OK well I think i have the answer. My car leaks out vapour and does no have the schweppes pshhhhhh sound. But I looked at my mates cap which works properly and the difference was a real thin rubber ring which I remember taking off the fuel cap cause it had already half fallen off when i first bought the car.

superspit Mentor

superspit

Posted
  • Author
Posted
OK well I think i have the answer. My car leaks out vapour and does no have the schweppes pshhhhhh sound. But I looked at my mates cap which works properly and the difference was a real thin rubber ring which I remember taking off the fuel cap cause it had already half fallen off when i first bought the car.

thanx CR33

Do u think that pressure, or lack there of, can create performance problems in the fuel delivery department, or compromise safety at all?

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