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spark plug cap size

Posted: Tue Apr 28, 2026 12:48 pm
by Simonpsmith
Have just bought Champion D9 spark plug - but the current plug cap (LB05EH) doesn't fit as the spark plug is wider than the old one.
I could use a spade end fitting but would like to know if there's a plug cap that fits?
PXL_20260428_114346599.jpg

Re: spark plug cap size

Posted: Tue Apr 28, 2026 2:33 pm
by simon.holyfield
The plug is missing it's screw-on terminal!

Spark_Plug_Champion_Ford_Early_V8_38-48_F1_F2_F3_48-52_854_RH10C.jpg

Re: spark plug cap size

Posted: Tue Apr 28, 2026 5:11 pm
by Simonpsmith
answered my own question:

None of the NGK plugs caps fit the Champion D9’s.

But these do:
Pattern Spark Plug Cap R90 Black Water Resistant Rubber Lodge No Resistor
https://www.gsparkplug.com/1x-pattern-s ... istor.html