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Walt Dupont--Me. · 11-04-2013, 07:35 PM

It's probably already drill to big for a 14MM helicoil. It's probably tapped for an 18MM plug. Accually I don't see why an 18MM plug won't work alright if you can get the right heat range. Walt

11-04-2013, 07:35 PM	#3
Walt Dupont--Me. Senior Member Join Date: May 2010 Location: Gardiner Me. Posts: 4,200	Re: Aluminum heads It's probably already drill to big for a 14MM helicoil. It's probably tapped for an 18MM plug. Accually I don't see why an 18MM plug won't work alright if you can get the right heat range. Walt