Tapping the Carb
Posted: Fri Feb 06, 2009 12:24 pm
Greetings:
The second PO-installed Heli-Coil dropped out of my carb during disassembly last night. No problem, I was ready!
Harbor Freight Tools has a cheap - in every sense of that word Chinese Tap&Die set for $8.99. Just good 'nuff to thread Al-You-Mini-Yum, not so much for Space Shuttles.
I decided to go with 1/4" x 20 TPI for ease of replacement. I had a 2" and a 1-1/2" hex bolt on hand. They were a little too fat to fit through the manifold and brown heat insulating spacer, but not by much. A quick pass with a 1/4" drill and all was good.
The 1/4" tap sliced threads into the carb flange like a hot knife through butter. even the flimsy tap holder held up OK. The bolts could each be 1/4" shorter, or 1-3/4 and 1-1/4 to be perfect, but they don't stick out so far as to dent the carb bowl. Good enough.
The second PO-installed Heli-Coil dropped out of my carb during disassembly last night. No problem, I was ready!
Harbor Freight Tools has a cheap - in every sense of that word Chinese Tap&Die set for $8.99. Just good 'nuff to thread Al-You-Mini-Yum, not so much for Space Shuttles.
I decided to go with 1/4" x 20 TPI for ease of replacement. I had a 2" and a 1-1/2" hex bolt on hand. They were a little too fat to fit through the manifold and brown heat insulating spacer, but not by much. A quick pass with a 1/4" drill and all was good.
The 1/4" tap sliced threads into the carb flange like a hot knife through butter. even the flimsy tap holder held up OK. The bolts could each be 1/4" shorter, or 1-3/4 and 1-1/4 to be perfect, but they don't stick out so far as to dent the carb bowl. Good enough.