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fuel leaking from cap ?
https://auszookers.com/forum/viewtopic.php?f=37&t=42551		 Page 1 of 1
Author:  murph51 [ Tue Aug 20, 2013 6:56 am ]
Post subject:  fuel leaking from cap ?
did a quick search but couldn't find the answer I was looking for..

as I found out on the weekend, at hectic slopes fuel decides to part ways with my fuel tank via the cap.. I was reading alittle bit and I saw that the caps are vented? so is there really no other way around this to prevent fuel from pissing out every time the car gets only sharp angles? 1.6 EFI sierra, standard tank I believe.
Author:  christover1 [ Tue Aug 20, 2013 7:43 am ]
Post subject:  Re: fuel leaking from cap ?
As far as I know, only very early Sierras vented through tank cap.
My 1.0L Sierra would do that on bad angles.
Most Sierras vent through carbon canister and don't need a vented cap.
An EFI engine is unlikely to be a stock Sierra tank,
so make sure tank plumbing and breathing is correct, then buy a better cap.
Author:  alien [ Tue Aug 20, 2013 8:02 am ]
Post subject:  Re: fuel leaking from cap ?
There's a rubber seal inside the fuel cap - yours has probably gone hard/perished.
Author:  murph51 [ Tue Aug 20, 2013 10:15 am ]
Post subject:  Re: fuel leaking from cap ?
ah, thanks for the prompt response!

I believe the tank is stock.. pump and all the other wizardry certainly does not look stock! haha

when I say leak.. I mean like bloody pissing out, so that would suggest that the cap is in desperate need of renewal ?
Author:  alien [ Tue Aug 20, 2013 3:42 pm ]
Post subject:  Re: fuel leaking from cap ?
I'd try making or buying a new rubber seal first... be way cheaper.
Author:  tanshi [ Tue Aug 20, 2013 3:48 pm ]
Post subject:  Re: fuel leaking from cap ?
we have had issues with fuel comming out through the key hole in some caps.
we filled the whole key hole up with silicon sealer.
Author:  coily96 [ Tue Aug 20, 2013 8:40 pm ]
Post subject:  Re: fuel leaking from cap ?
What could be worse is going through some deep water and having water go in the tank.

New caps are on ebay pretty cheap with new seal and key. Draining the tank and flushing the lines is alot harder.
Author:  Jezzer [ Wed Aug 21, 2013 3:33 am ]
Post subject:  Re: fuel leaking from cap ?
I used to have this problem and after filling the tank up with water while stuck on a large rock in a river. A few people in the club recommend to get a genuine suzuki fuel cap it locks down really tight and have never had the problem again and a lockable one was around $30 and a non lockable was about half that
Author:  alien [ Wed Aug 21, 2013 8:08 am ]
Post subject:  Re: fuel leaking from cap ?
http://suzistore.com.au/onlinestore/fou ... etail.html

I didnt realise they were so cheap!

Mines exactly like this one (genuine suzuki) and never leaks.
Author:  sideways [ Wed Aug 21, 2013 8:42 am ]
Post subject:  Re: fuel leaking from cap ?
christover1 wrote:
As far as I know, only very early Sierras vented through tank cap.


All Sierras had a carbon canister. Even LJ80s (dunno if 50s had it?) had a separate line that vented into the airbox.

tanshi wrote:
we have had issues with fuel comming out through the key hole in some caps.
we filled the whole key hole up with silicon sealer.


My sierra has a 10c coin siliconed over the key hole. :lol:

The locking caps like suzistore has are $20 on eBay.
Author:  murph51 [ Wed Aug 21, 2013 10:01 am ]
Post subject:  Re: fuel leaking from cap ?
thanks heaps guys!

ordered and on its way!
Author:  christover1 [ Wed Aug 21, 2013 11:20 am ]
Post subject:  Re: fuel leaking from cap ?
sideways wrote:
All Sierras had a carbon canister. Even LJ80s (dunno if 50s had it?) had a separate line that vented into the airbox.
.

Mine may have been butchered by a previous owner.
Definitely had the keyhole leaking issue.
When I 1.3'd it, it got a carbon canister.
Author:  JrZook [ Wed Aug 21, 2013 2:28 pm ]
Post subject:  Re: fuel leaking from cap ?
alien wrote:
http://suzistore.com.au/onlinestore/four-wheel-drives/sierra/sierra-sj70-13l-1988-96/fuel1272172567/CAP-FUEL-LOCKING-3572-detail.html

I didnt realise they were so cheap!

Mines exactly like this one (genuine suzuki) and never leaks.


Those caps last for about a year before the seal perishes and fuel starts pouring out again. May be a maruti part, I doubt they are genuine (Jap) good quality parts.
Author:  alien [ Wed Aug 21, 2013 3:53 pm ]
Post subject:  Re: fuel leaking from cap ?
Maybe suzuki can source a genuine one? (not maruti) and in doing so, they'd be able to key it to your ignition (this is how mines done).
Author:  SierraDan [ Thu Aug 22, 2013 5:45 pm ]
Post subject:  Re: fuel leaking from cap ?
Ive never had fuel leak issues with the Suzuki cap.

I'd say its the seal too.
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