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Mike Thomas
Tinkerer
AB
JZZ30 GTTL

Posts: 99
Reg: 09-2007

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Thursday, March 20, 2008 - 10:05 am, by:  Mike Thomas (Petcanizzle) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Theres always pressure in a gas tank from evaporated fuel.. naturally.
But when i park and get out i notice a hiss, quite audible... from around the gas cap area....

It goes away of course when the pressure is reduced...

is this normal or is there a seal damaged, gas cap needs replacing, or whatever...
Adrain Parsons
DieHard
Qld
JZZ30 tt

Posts: 598
Reg: 08-2005

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Thursday, March 20, 2008 - 10:28 am, by:  Adrain Parsons (Ace1975) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

might be a leak there mate. when you car is full of fuel does it leak out the side and down on your paint?
Mike Thomas
Tinkerer
AB
JZZ30 GTTL

Posts: 100
Reg: 09-2007

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Thursday, March 20, 2008 - 10:44 am, by:  Mike Thomas (Petcanizzle) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

not that ive noticed, altho i have been known to dribble off the spout of the pump sometimes...
Keenan Edinger
TryHard
WA
UZZ31 GT-L V8

Posts: 210
Reg: 02-2006

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Thursday, March 20, 2008 - 02:35 pm, by:  Keenan Edinger (Keenan585) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I'd say it's just the normal pressure exiting from your tank. Mine does it every time I unscrew the cap to fill her up. Standard build up of pressure being released.
Dale Holan
TryHard
Alberta
2.5 GTT L

Posts: 260
Reg: 06-2007

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Friday, March 21, 2008 - 07:43 am, by:  Dale Holan (Xtrax) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I get the his when I open it up but isn't it a vacuum? not a pressure build up? I'd say you probably have a leaky gas cap.
Mike Thomas
TryHard
AB
JZZ30 GTTL

Posts: 101
Reg: 09-2007

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Friday, March 21, 2008 - 03:32 pm, by:  Mike Thomas (Petcanizzle) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

hmm yeah i know it happens when u unscrew the cap, thats why youre supposed to unscrew halfway then the rest of the way a few seconds later to avoid something or other...

anyways yeah anyone got a link to replacement gas caps theyre likely a fortune at toyota and i cant find anything online at ebay or whatever..

someone able to grab one at a wrecker or a replacement at a local shop and post it? :-)

the gas tanks opening and screw caps on the soarer are totally different than in north america, theyre like way huge...
Graham Dollisson
Goo Roo
QLD
GTTL , Morris Marina, P76 V8 Super, P76 6cyl Deluxe

Posts: 1242
Reg: 07-2005

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Friday, March 21, 2008 - 03:53 pm, by:  Graham Dollisson (Alloyvee) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Snake caught in your fuel tank....
Dave Hart
Goo Roo
Waikato
UZZ32

Posts: 1268
Reg: 08-2005

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Friday, March 21, 2008 - 07:12 pm, by:  Dave Hart (Davyboy) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

A specific vapour pressure is part of the specs, same as octane number is.
When you buy some it will come out of the underground tank at a lower temperature than what is normally that in your tank.
Therefore when you go to buy more you've usually got a low level in your tank, the remaining space filled with the vapour and at a higher temperature therefore at a higher pressure.
Not sure what type of filler cap you have but mine screws in until it clicks and you can't tighten it further. Any hissing would lead me to believe that this vapour pressure is passing the cap seal and not the hose that connects the tank to the filler pipe otherwise you'd smell the fumes in the car.
Seeing that you're in a cold climate may mean that your fuel is blended different to take account of the lower temperature ie more volatile.
Either way I'd inspect your filler cap and seal.
Don Bagnall
Moderator
New Zealand
I have WAY less Soarers than Hayden :-(

Posts: 6674
Reg: 05-2005

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Saturday, March 22, 2008 - 02:49 pm, by:  Don Bagnall (Baggs) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Probably a leaking cap seal...


Upload


Cap seal part number below.

Upload


Complete fuel cap assembly part number below.

Upload


Steven Nanevski
Goo Roo
New South Wales
D Day has almost arrived....

Posts: 1702
Reg: 07-2005

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Saturday, March 22, 2008 - 05:20 pm, by:  Steven Nanevski (Imprestik) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

I have the same issue as Mike has, but I can't fill up my car after driving it for 30 mins or so becuase if I do, it will piss out heaps of petrol. Will replacing this cap seal fix this issue?? I know my cap seal has been broken for years now, but never effected it before, it has only been recently this has been happening...
Peter Nitschke
JunkFilterer
South Australia
UZZ30 UZZ31

Posts: 8995
Reg: 11-2004

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Saturday, March 22, 2008 - 05:38 pm, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Doesn't the car vent through the carbon cannister under the bonnet?
Mike Thomas
TryHard
AB
JZZ30 GTTL

Posts: 106
Reg: 09-2007

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Monday, March 24, 2008 - 04:57 am, by:  Mike Thomas (Petcanizzle) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

peter we need to get you your own call in live tv show for soarer stuff... thanks for the part numbers!

i hate the stock fuel cap, is the only replacement dressup option that TRD fuel cap COVER they sell on ebay for a retarded price?

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