Monaro boot mounted fuel tank

Monaro boot mounted fuel tank

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LC36

Original Poster:

20 posts

145 months

Sunday 7th August 2022
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Hi everyone, I put fuel in the Monaro the other day for the first time and it was incredibly slow to fill with the pump continually clicking off. Is this normal or could I possibly have a problem within the tank.

mfp4073

1,976 posts

180 months

Sunday 7th August 2022
quotequote all
As far as I am aware this is normal, I’ve had my car for 15 years and it does it most times I fill up. It could be an air lock in the system or maybe the tank is actually full but the fuel gauge will not indicate full.
Very frustrating if you’re going on a long trip.!!!!

Lincsls1

3,415 posts

146 months

Sunday 7th August 2022
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John is correct, I've had the later Monaro with the boot tank and distinctly remember it being a ste to fill sometimes.
IIRC, you have to find the sweet spot with the nozzle position and simply don't pull the trigger 100%. It will never fill at 100% but with practice you can probably achieve 75-80% speed and not have it keep clicking.
I'd forgot all about this vice until you mentioned it.
It is simply a design flaw, something overlooked when GM made changes to the car for US safety reg compliance.
For other potential researches, this does not effect the earlier car with tank underneath.

Edited by Lincsls1 on Sunday 7th August 08:46

Null.Performance

124 posts

68 months

Sunday 7th August 2022
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I also have a CV8 Monaro with the fuel tank upright behind the rear seats and the fuel flap high up on the rear quarter panel.
My first time trying to fill up the Monaro went pretty much as you described. It definitely takes a little practice to get it right.
What works for me is first gently finding the sweet spot with the nozzle position, supporting the grip and hose with both hands,
and then I start pumping at sloooow speeds for the first couple of seconds.
Proceed by gently pulling the trigger more and more until max speed is reached and that way it should fully fill up without clicking off in between.

This made refueling my Monaro a breeze.

A little backstory on where this technique comes from:
The worst car I have ever had to fuel up (on a regular basis, as it was a company vehicle) was a 2012 VW Amarok Diesel.
That car must have one of the worst filler pipe designs in history... The first bit of it is way too short to accommodate the larger diesel fuel nozzle,
and it curves downward at an almost 90 degree angle immediately afterwards, causing backsplash that makes the pump click off.
I swear you kind of had to twist the nozzle in there, support the grip with both hands, be super gentle, and fill up at 50% speed max...
Even if you got everything right, filling up the 80 liter tank would take quite a while and the pump would STILL click off a couple of times.

Me and my colleagues were so frustrated by this and some other "quirks and features" of that car, it was unanimously hated by everyone.
The only good bit is this POS car is where I have developed my (admittedly probably weird-looking from the outside) fill up procedure.

But hey, if it works, it works smile

LC36

Original Poster:

20 posts

145 months

Sunday 7th August 2022
quotequote all
Thanks for the replies, puts my mind at rest knowing it's a car thing as opposed to a problem. I have tried it with a 5 litre jug I use to fill my bike on trackdays and it took that no problem. I did actually end up at the filling station messing around with nozzle angle and depth. Found a spot that wouldn't keep the pump clicking off but it was painfully slow, although I didn't slowly bring the pump up to full speed. I may end up filling my 5 gallon cans and using the jug.

SturdyHSV

10,206 posts

173 months

Sunday 7th August 2022
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Null.Performance said:
It definitely takes a little practice to get it right.
What works for me is first gently finding the sweet spot with the nozzle position, supporting the grip and hose with both hands,
and then I start pumping at sloooow speeds for the first couple of seconds.
Proceed by gently pulling the trigger more and more until max speed is reached and that way it should fully fill up without clicking off in between.
Swiss Toni, is that you? hehe



It was a comedy sketch, worth a YouTube search of some of the quotes, his bit was mostly about comparing everything to being "like making love to a beautiful woman" and your explanation sounded like it was straight out of one of the sketches hehe

mr nosiris

252 posts

193 months

Sunday 7th August 2022
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Well that’s my car stollen! First I’ll call the police and then I’ll get back to my eggs 😂🤣
Fkn live vic n Bob type humour 🤙👍🏻

mr nosiris

252 posts

193 months

Sunday 7th August 2022
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Sorry added emoji’s instead of smilies.

There’s is something cool about a Monaro fuel opening though it looks a bit trick and more than you would expect. I always thought this would’ve been the same throughout the Holden v8 range but I’ve just found out it’s not. It doesn’t really matter I suppose!
But don’t really think I’ve had a problem filling up unless the outside flap had frozen shut and had to use the dwindling heat from my hands to melt the ice while angry petrol station punters waited behind me thumbup