I have several old drain valves that I am trying to re-use. I have 6 of them, 3 with BB on them and 3 others.
The BB ones don't seem to clean up like the other ones. Should I just keep going until I get the whole length of valve shiny?
PS Lang's was out of the original style drain valves.
Second question. I am installing a new sediment bowl on my 23 Coupe. Should I install as it comes or take it apart and put the aviation lube on the shutoff valve?
I've had good luck with ordinary soap
I would spend a little more time on it if the remaining groves are not too deep. Once finished be sure to use the aviation lube.
As far as the sediment bowl goes, if there is no evidence of aviation lube used in the assembly I would use some, all you are sacrificing there is the carter key.
I used valve grind compound and never got it to stop leaking. Never heard of using aviation lube. Where do u get aviation lube?
I used time saver on my radiator drain valve. It took a while but it cleaned up and doesn't leak. I do not use any lubrication on it.
Here is one place you can purchase aviation fuel lube.
Lang's has it, got a tube with my last order and of course now I have 2!
When stationed in Pagua, Canada, we had a bulldozer (D-8 or 9) that developed serious injector leaks. We lapped the injectors with some kind of talcum powder while keeping the valve submerged in diesel fuel. It worked and we used the dozer until we couldn't any more. One day, when returning to base, I went over a 12X12 well that was covered with 2 inch lumber that was under the snow. It didn't hold the dozer. As the dozer settled, I heard gravel splash in water way down there. About 4 inches more to the left and the whole thing would have gone down. Those wide mud tracks saved the day.
Try lapping in your valves with toothpaste. It is a very fine, mild abrasive that works well in achieving smooth surfaces. I've use it successfully lapping in needle valves, drain cock valves, and fuel shut-off valves. No specific brand preferred over the other.
I have also used toothpaste with great results.
Here's a chart of toothpaste abrasiveness:
Brass make a good lapping compound