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Wales
by Joske Vermeule, September 1
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Jun 14th, 2026
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Joined: Jan 2014
Posts: 57
Just Getting Started
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OP
Just Getting Started
Joined: Jan 2014
Posts: 57 |
Does anyone know how to remove the gas cap on the M3W?
It has six bolts, one of which is under the hinge and another under the lever. I can't fathom how on earth to get those things out without breaking the pin that holds them on. I ordered some ultra low profile hex wrenches but don't have a lot of faith that they'll clear it.
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Joined: Feb 2018
Posts: 807 Likes: 38
Talk Morgan Regular
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Talk Morgan Regular
Joined: Feb 2018
Posts: 807 Likes: 38 |
While I've not had my gas cap assembly off my M3W yet, I have two other cars with similar design 'Monza' style caps, and the top hinged portion of the cap is threaded onto the adaptor/base (the bit with the six screws). Normal RH thread, btw.
Last edited by Bitsobrits; 20/06/22 02:34 AM.
Steve
Late 2012 M3W
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Joined: Jul 2013
Posts: 492 Likes: 11
Learner Plates Off!
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Learner Plates Off!
Joined: Jul 2013
Posts: 492 Likes: 11 |
Good quiestion. I tried to remove mine last year but ran in to the same problems. At the time I was trying to remove the lockable gas cap, which had been stuck. Luckily we finally got the locking cap out, so I gave up on removing the gas cap. I've since taken othes' advice and nver put the locking cap back in. But I'd like to hear how this is done anyways.
Craig - Texas, USA
2026 Plus Four
2021 M3W
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Joined: Feb 2016
Posts: 8,695 Likes: 415
Needs to Get Out More!
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Needs to Get Out More!
Joined: Feb 2016
Posts: 8,695 Likes: 415 |
This image might help. ![[Linked Image]](https://www.classicbikepartscheshire.com/images/monza-alloy-polished-fuel-cap-adaptor-fits-hinkley-triumphs-2001-onwards-p3094-3531_image.jpg)
Richard
2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
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Joined: Jun 2021
Posts: 1,987 Likes: 104
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Jun 2021
Posts: 1,987 Likes: 104 |
There's one for sale on Ebay https://www.ebay.co.uk/itm/403695986129 with several pics from different angles ![[Linked Image]](https://www.tm-img.com/images/2022/06/20/Monza-filler-cap.jpg)
Peter
2009 3-litre Roadster "Ivor", royal ivory / green
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Joined: Nov 2018
Posts: 6,675 Likes: 441
Talk Morgan Sage
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Talk Morgan Sage
Joined: Nov 2018
Posts: 6,675 Likes: 441 |
That's looks like the Newton Equipment 'Classic' range Newton Equipment
"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10
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Joined: Jun 2021
Posts: 1,987 Likes: 104
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Jun 2021
Posts: 1,987 Likes: 104 |
The seller lists it as "monza style fuel filler cap / morgan 3 wheeler", he's located in Malvern which somehow I find a bit worrying..... 
Peter
2009 3-litre Roadster "Ivor", royal ivory / green
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Joined: Jan 2014
Posts: 57
Just Getting Started
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OP
Just Getting Started
Joined: Jan 2014
Posts: 57 |
It certainly does look like a Newton unit. I reached out to them about disassembly.
I'm guessing the whole cap is threaded on but if it is, my god is it on tight. I'm probably going to try taking a spanner wrench to it to see if I can get any movement. I've looked for any sort of locking ring or pin without luck so far.
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Joined: Feb 2019
Posts: 3,857 Likes: 2
Talk Morgan Addict
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Talk Morgan Addict
Joined: Feb 2019
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While I've not had my gas cap assembly off my M3W yet, I have two other cars with similar design 'Monza' style caps, and the top hinged portion of the cap is threaded onto the adaptor/base (the bit with the six screws). Normal RH thread, btw. That is good information, thank you.
2019 M3W Sold and is now in Las Vegas enjoying the showgirls :-)
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Joined: Nov 2018
Posts: 6,675 Likes: 441
Talk Morgan Sage
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Talk Morgan Sage
Joined: Nov 2018
Posts: 6,675 Likes: 441 |
It certainly does look like a Newton unit. I reached out to them about disassembly.
I'm guessing the whole cap is threaded on but if it is, my god is it on tight. I'm probably going to try taking a spanner wrench to it to see if I can get any movement. I've looked for any sort of locking ring or pin without luck so far. They may have stuck some form of loctite on the threads. Perhaps a bit of heat ( heat blower rather than naked flame!) may help loosen it.
"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10
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