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buggered spark plug threads #1& #3 200 1992

posted by  Will740turbo on  Mon May 2 02:27 CST 2016
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last visit: Wed Oct 22 16:09 CST 2014
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I had this issue with my 740T.

I had to tap slightly larger threads (carefully with the head on and with heavy grease to catch the shavings AND blowing out the cylinder with compressed air) and then used an insert kit from Napa. I put another 3 sets of plugs through it.

The insert has a few parts and a few steps. It uses both thread-locker and an expanding portion to lock the insert from turning and coming out with a spark plug.

The kit was worth every dollar! Cost between 10 and 50 dollars and you could buy additional inserts. I think I still have it somewhere. You can buy individual inserts.

Very similar to this, if not identical: http://www.napaonline.com/napa/en/p/SER2125/SER2125

The trickiest part for me was properly drilling a countersink.

Good luck!






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New buggered spark plug threads #1& #3 [200][1992]
posted by  BonesandFeathers subscriber  on Sat Apr 30 17:21 CST 2016 >


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