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-   -   Valve Guide drill bit source needed (http://forums.pelicanparts.com/porsche-911-technical-forum/1081158-valve-guide-drill-bit-source-needed.html)

dannobee 12-20-2020 06:03 AM
Does your valve grinder index at 90 degrees? If so, I'd at least try buying a 15/32" drill bit and chucking it up in the valve grinder at 90 degrees and turn it down to 0.354". Obviously true up the stone first and go slow.

john walker's workshop 12-20-2020 07:23 AM
That can be done. It's the large OD cutting angle that's going to be difficult.

dannobee 12-20-2020 12:58 PM
After cutting the 9mm shank in the valve grinder, cut the OD cutting angle at your desired angle using the side of the stone. Grind the relief by hand if it makes you feel better. Likely not needed on soft valve guides.


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