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Author Topic: Nelson Plug Size  (Read 4284 times)

Offline Roy Johnson

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Nelson Plug Size
« on: March 18, 2024, 07:10:36 AM »
Can anybody tell me if the Nelson glow plugs are the standard glow plug thread size? In pictures I've seen they appear to be larger diameter.

Offline BillLee

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Re: Nelson Plug Size
« Reply #1 on: March 18, 2024, 07:32:27 AM »
Yes, larger diameter than a standard glow plug.
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Online Paul Smith

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Re: Nelson Plug Size
« Reply #2 on: March 18, 2024, 07:35:03 AM »
Yes.  They are of a bigger diameter.

Also, they do not bottom out against a plug washer, but rather use a cone at the bottom of the plug that seals against a cone-shape in the head. 

This design has become the new standard of most high performance engines.  The current crop of plugs requires a 10 mm hex wrench.
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Offline Paul Gibeault

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Re: Nelson Plug Size
« Reply #3 on: June 24, 2024, 03:52:41 PM »
To answer your question. NO. the regular plug thread size is 1/4 - 32 .  The Nelson plug thread size is 11/32-32.  So it's 3/32" wider in diameter ;)


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