I’m wondering if there is such a thing as a threaded bulkhead fitting for a blind setup. Like for a valve cover breather if you couldn’t take the valve cover off the motor? Needs to be about 1” or a little larger. Seems like it could be a thing but maybe just no demand. Looking for something slightly more secure than a push in grommet but really don’t want to take the welder to it.

https://www.speedwaymotors.com...ps-Short,231742.html


Maybe the bottom part of this ?

Doubt VC thick enough to tap. Could weld fitting oin inside room orovided. Run any tittin that will accept o-ring. Could have tube with kjnner thread and threaded at base to allow to kinsert thru bottom then run a nut down ion it from top with o-ring around bottom of it, There you go new design

Pro Werks makes several:

Cap sizes are: 1 5/8, 2 inch, 2 3/4, 4 1/4 . 1/2 tall, 1 inch tall, 2 inches tall. Polished, black, red and blue. All with "O" rings and 4 10/32 mounting hardware for a perfect vacuum seal.

I bought mine from Speedway but also available from Chassis Shop or Pro Werks direct.

Bob

The one at the speedway link might work if I use sheetmetal screws. This is for my puke tank (boosted methanol). I’ve cleaned it out and welded on it once, but even though I flushed it a bunch of times, as soon as I took the welder to it, I started smelling methanol, which is pretty unsettling. I’d rather not try that again

Didn’t moroso make a set of breathers that threaded in back in the day don’t know if still available

Moroso 68785

quote:

Originally posted by BJs Wild Ride:
The one at the speedway link might work if I use sheetmetal screws. This is for my puke tank (boosted methanol). I’ve cleaned it out and welded on it once, but even though I flushed it a bunch of times, as soon as I took the welder to it, I started smelling methanol, which is pretty unsettling. I’d rather not try that again

1: When I weld tanks I set them outside and run a garden hose in it for a while. The other tried and true but spooky method is to let it air out for a while and then wave your propane torch at the entrance. It might or might not go POOF. Either way it's good to go weld.

2: Not fond of the metal screw idea. On something like .060 wall use a fine thread tap. Loctite the bolt or even better a stud.

3: If your intent is to use this as a breather port you will need to modify a AN Union for the filter to clamp to and also fit the piece you buy (not AN?) or make.

That bolt on piece is reasonably simple. It's something I could CNC. It won't be production priced but you can get it any way you want.