• Does each and every gallery plug really need to be done, or just some of them (which ones)?
• What’s the deal with the plug which leads to #4 bearing; should I pull it or leave it alone? Concerns raised due to worrying statements like this…
Don't pull out the tiny one on the pulley end of the case. Apparently, the extra length serves as a restriction to oil flow to #4 main. Supposedly if you replace this plug with a shorter pipe plug, you will blow oil out the pulley as the bearing wears. I have no firsthand with this, but I cite this as a reference;
• Thread sealant – Loctite 518 anaerobic flange sealer seems to be popular as does Loctite blue threadlocker. Preferences?
I’m not in the US and the NPT standard is not common where I live (but the fittings are so easiest to stick with that) which means I can’t wander down to the hardware store. I can buy the taps cheapest online from somewhere like http://www.victornet.com/departments/Taps/100.html (McMaster-Carr won’t ship internationally unfortunately). This means I need to be particularly careful with choosing the correct ones.
So far I’ve picked out:
• 1/8"-27 NPT National Pipe Taper HSS Pipe Tap
• 1/4"-18 NPT National Pipe Taper HSS Pipe Tap
• 3/8"-18 NPT National Pipe Taper HSS Pipe Tap
• 21/64" HSS Drill Bit
• 7/16" HSS Drill Bit
• 37/64" HSS 1/2" Shank Drill Bit
Are taper taps appropriate for doing this job? They seem to be more commonly available then plug taps which I can understand might be better. Reamers to create the taper prior to tapping – necessary or not? Dire warnings exist with regard to cracking the case if the drilled hole is not reamed appropriately prior to tapping.
Questions, questions, questions; I'm sure I'll have more soon... Hints and tips would be much appreciated.