What plug, W16FS-U or W14-U? (1 Viewer)

[red66toy]

Hey guys, I am going to give my cruiser a tune up and was wondering what spark plugs are correct for my 64 F135 motor. They currently have the denso W16FS-Us in them but I read that the W14-U are the ones I need. Is this true? Thanks a lot.

 

[wesintl]

14m/m x 3/8

which I think are the 14-u

My oem owners manual claims w14 denso or ngk b4

The info I got from treeroot is:W16FS-U are the new nippndenso, W17P are the old nippondenso, although he's out to dinner with Algazy

difference being 3/8 or 1/2.. It probably doesn't matter but it'd be interesting to know if the 3/8 is that much better...


I have the ngk b5hs based on the w16... 1/2 reach. HUMM..

 

[red66toy]

Marks in Colorado? That would explain his absence lately. Thanks for the info, I am going to order some tomorrow.

 

[zebrabeefj40]

More plug info in this thread...

https://forum.ih8mud.com/showthread.php?t=48021

The NGK number worked fine in my '66 FJ45.

HTH,
Nick

 

[treerootCO]

3/8 reach is correct....thanks to Cruiser Nerd we now have this chart

This is the OEM plug.....