In a message dated 5/9/2007 10:45:44 AM Pacific Standard Time, 
nels@flightsim.com writes:
> So, my question is, are the current 1/2" reach plugs the wrong ones and 
> how can I safely tell? I would imagine if I put in the 3/4" plugs and 
> they are too long they would impact the cylinder, which obviously would 
> not be a good thing.
> 
Nels, take a piece of stiff wire (a paper clip works) put a short right angle 
bend in it and then probe your spark plug hole being careful not to drop the 
wire into it.....you'll then know if your head is for 1/2" or 3/4"....heads 
got swapped over the years.......a 1/2 plug will maybe work in a head designed 
for a 3/4" plug but not vice versa....
Terry in Oakland<BR><BR><BR>**************************************<BR> See 
what's free at 
http://www.aol.com.</HTML>
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