Speed,Combat,Scale,Racing > Combat
Nelson Plug Size
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Roy Johnson:
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.
BillLee:
Yes, larger diameter than a standard glow plug.
Paul Smith:
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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