Gallery, Projects and General > Mod-Ups!

Pipe and Bolt Engine Mod-Up

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vtsteam:
The head underneath, before drilling and cleaning up:

vtsteam:
I drilled back through the lower holes as guides, and through the upper piece with the tap drill.

When all fastening holes were drilled, I flipped the piece right side up and drilled back down the tap size holes with the clearance size drill.

This sequence allowed me to maintain the head in perfect alignment with the pre-drilled tap drill holes in the cylinder, as well as the valve and bore holes.

vtsteam:
A test fit of the head -- I had placed the head on top of the cylinder while tapping, to use the clearance holes as guides to keep the tap square. It all went easily:

RussellT:
It's coming on well!  :thumbup: :thumbup:

Russell

vtsteam:
Thanks Russell!  :beer:

Today I chucked a 3/8" pipe plug in the 3 jaw and turned off the square end:

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