Posted February 22, 2011 - 11:27 AM
Posted February 22, 2011 - 12:48 PM
Posted February 22, 2011 - 03:19 PM
I use a dremel with the tiny cutoff discs to clean out the threads. I can't tell you how many I've cleaned out to find great threads under all the carbon. If you had a large enough NPT thread tap, you might could chase the threads clean with it easier if the tap isn't too long .
Posted February 27, 2011 - 03:38 PM
Cleaned out threads in the block as best as I could. I was able to screw in a 1" blackpipe nipple and use one of the kohler 8-12 hp pancake style mufflers. Works good, but a little loud. Will cut the threaded portion of the kohler fitting off and try to weld threaded portion of a blackpipe nipple onto it if the fitting is cast steel. I'll keep you posted on this project.