I want to replace the lower straight fitting off of the oil pump with a 90, because I’m replacing the hoses with non formed ones. Is it a 1/8 NPT x 3/8? What I’m seeing online is 1/8NPTX? Never heard of the one with an X

 

I believe it is an 1/8" npt

 

Ok cool. Ill prolly get one and try it out. Should I use a layer of teflon?

 

Yeah, sparingly though.

 

Another option:

https://www.permatex.com/products/th...ant-with-ptfe/

https://www.henkel-adhesives.com/us/...-sealants.html

 

Ended up getting a 1/8x1/8 street elbow. Screwed the straight fitting into the elbow. worked out well. No kinks. All I had to do was on the threaded side the inner hole was smaller, drill bit and drill press took care of that. Now the fitting is same size all the way through. so far so good.

 

Glad it worked out. I thought it was a NPTF. Which is a designation in the case of pipe thread as dry seal. The parts are machined to a slightly different dimensions. Same taper and threads per inch. They are basically sharper at OD and Valleys. No sealant or tape is needed when they are good shape. Like brake line connections in a car at the master.

I don't see NPTX either in my Federal H28 standards but they are old books. Where did you see that just out of curiosity.

Don't see it here either..

https://www.engineeringtoolbox.com/t...rds-d_776.html

Thanks

 

I ended up coating threads with some thread sealant. Just enough to seal but not be squished out.

I can’t find the link anymore. Wish I would have posted it back when I saw it. not sure if I was looking at right one or not. Ended up finding fitting at hardware store.

 

My dead uncle-in-law was a pipe fitter/welder/whatever you call them, taught it at the union school, worked in the Texas chemical plants for decades, etc. He told me that Teflon tape was not for sealing the taper fit, but to provide lubrication.

Yeah, hardware stores are a good source for fittings like that and provide "instant gratification." The online race parts providers are also good.

 

correct, Teflon is lubrication for threads to prevent galling.