fuel transfer on dual tanks
Submitted: Wednesday, May 09, 2012 at 15:17
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Gossy
I have a long
ranger second tank on my GQ nissan patrol.
After driving for a while one of my tanks 'implode' causing a massive bang under the car. A few hours after driving the bang appears again.
It's fairly obvious that the 'breathing' of one of the tanks during the fuel transfer (auto suction and not a 12v pump) is blocked in some way to keep the pressure ok whilst the fuel is moving between the tanks.
my question is two fold:
a) which tank is breathing (or in the case not) and,
b) which hose do I then need to
check for blockage?
I've looked underneath and there are hoses all over the place so I don't want to start unplugging them all when I don't know what I'm doing.
Cheers,
Reply By: GT Campers - Wednesday, May 09, 2012 at 16:42
Wednesday, May 09, 2012 at 16:42
You need to identify the breather hose. It's usually the highest hose plumbed to the tank, in the LR product it is usually to a dome ceiling section (the highest point/section) of the tank. This hose MUST not be blocked/kinked etc and should be plumbed to atmosphere via the filler neck or the charcoal cannister (depending on vehicle and fuel type)
Get a mechanic/mate to assist
AnswerID:
485360
Follow Up By: Gossy - Wednesday, May 09, 2012 at 17:50
Wednesday, May 09, 2012 at 17:50
so it's the second tank that's breathing; thanks.
FollowupID:
760622
Follow Up By: GT Campers - Wednesday, May 09, 2012 at 21:40
Wednesday, May 09, 2012 at 21:40
yeah... Maaaaybeee. That's the one that's been fiddled, so start investigating there
FollowupID:
760652
Reply By: Rockape - Wednesday, May 09, 2012 at 16:45
Wednesday, May 09, 2012 at 16:45
Gossy,
don't know if your GQ tanks are the same as Tojos but have a look at thread 95158.
It may help,
RA.
AnswerID:
485361
Follow Up By: Gossy - Wednesday, May 09, 2012 at 17:57
Wednesday, May 09, 2012 at 17:57
just read that
forum. Makes sense that diesel and red dust are a perfect mixture to block the filter (if there is one).
Now that I know what I'm looking for I'll get underneath it. It's tight on top of the tank so I might need to get it back to TJM who installed it years ago.
FollowupID:
760625
Follow Up By: Rockape - Wednesday, May 09, 2012 at 19:52
Wednesday, May 09, 2012 at 19:52
Gossy,
your tank might just breath through the fuel cap so
check that first as it is easy to do.
Patrol
forum will know the ins and outs of a GQ fuel system.
RA.
FollowupID:
760631
Follow Up By: Rockape - Wednesday, May 09, 2012 at 19:54
Wednesday, May 09, 2012 at 19:54
Just read your follow up and I would think if it is aftermarket tank it will breath through the filler cap.
FollowupID:
760632
Follow Up By: Gossy - Friday, May 11, 2012 at 08:40
Friday, May 11, 2012 at 08:40
Aha. This rings a bell now (it was installed years ago). I remember them telling me to ensure I don't swap the caps around. Fairly sure I haven't BUT the caps are covered in dust so I'll clean them up.
Cheers.
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