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Spark plug size

mooseye

New member
What is the size and pitch of

What is the size and pitch of the plugs in a 1968 4cyl 140 mcm?
I want to buy a compression checker that threads in.
 
Randy
Most compression tester


Randy
Most compression testers come with the common thread sizes by using adapters. The pitch issue is overcome by having rubber O rings seal the gap when threaded in the hole.
Bert
 
it goes back well into the las

it goes back well into the last century...at least some things are consistent.
 
"Ayuh,.... Actually,... It go

"Ayuh,.... Actually,... It goes back the Henry Ford,+ His Model T...
The sparkplugs in His motors were 18mm...."
 
"We can blame it all on that f

"We can blame it all on that french guy, Albert Champion.

(earliest 14mm reference I have is a 42 HD using them.)"
 
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