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tow bar
by G Walker - 24/08/26 06:52 PM
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Forums39
Topics49,836
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Most Online1,063
Jun 14th, 2026
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Joined: Sep 2025
Posts: 42 Likes: 4
Just Getting Started
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OP
Just Getting Started
Joined: Sep 2025
Posts: 42 Likes: 4 |
Hi all,
what's the spark plug gap for iridium plugs for a 2012 M3W?
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Joined: Sep 2025
Posts: 42 Likes: 4
Just Getting Started
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OP
Just Getting Started
Joined: Sep 2025
Posts: 42 Likes: 4 |
I've just done some extra digging and found the info
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Joined: Apr 2021
Posts: 99 Likes: 5
Just Getting Started
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Just Getting Started
Joined: Apr 2021
Posts: 99 Likes: 5 |
M3W 2017 Sport blue.
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1 member likes this:
Martin W |
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Joined: Sep 2025
Posts: 42 Likes: 4
Just Getting Started
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OP
Just Getting Started
Joined: Sep 2025
Posts: 42 Likes: 4 |
M3W spark plug gap same for both types - 0.97mm to 1.07mm or .038" to .042.
I went in the middle with .040 on some Iridium plugs, the little screw on things on top of the old plugs were really loose!
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1 member likes this:
PaulM3W |
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Joined: Apr 2021
Posts: 99 Likes: 5
Just Getting Started
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Just Getting Started
Joined: Apr 2021
Posts: 99 Likes: 5 |
M3W 2017 Sport blue.
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Joined: Jul 2013
Posts: 3,732 Likes: 79
Talk Morgan Addict
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Talk Morgan Addict
Joined: Jul 2013
Posts: 3,732 Likes: 79 |
the little screw on things on top of the old plugs were really loose! Take the tops off and give them a little squeeze with a pair of pliers until they are a bit tighter on the plug.
Red Leader 
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1 member likes this:
Martin W |
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Joined: Mar 2014
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Mar 2014
Posts: 1,737 Likes: 55 |
...or fix those pesky plug terminals in place with a dab of Loctite.
Andy
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1 member likes this:
Martin W |
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Joined: Feb 2019
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Feb 2019
Posts: 1,889 Likes: 16 |
I took a wee bit of solder material around the base and then tightened onto that
Rodger
2018 M3W "Dreamers on the Rise"
2004 Plus 8 (wife's)
old Goldwings and a couple of Harleys
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