[Roadsters] Engine Block Soft Plug Size

[Bill Cole]

     Hello, I'm trying to determine what the actual diameter is of the 
rear expansion plug that is located behind the cam of a late model r-16. 
I have a couple engines that have different size plugs in the back of 
them, one has a 44mm(1.732") and the other a 1.750" plug. I've seen a 
discussion of it being 44.425mm which is 1.749" so it could have meant 
to be 1.750". To me .018"is a pretty good difference from the 44mm plug 
to the 1.750" plug, or at least when it comes to engine parts it is. 
Even a 1-47/64 plug would be .002" tighter than the 44mm, so I'm hoping 
to get some feedback on what size plug other owners or rebuilders have 
used.. any input would be very much appreciated... Bill Cole