Engine/Transmission (1998.5 - 2002) Fuel fittings ??????

[hammersley]

I'm about to install my FASS fuel system and it comes with some large brass fittings. Does one need to put any sort of "pipe dope" for diesel fuel fittings, or do you just tighten them "naked"?

 

[kboettcher]

I use a pipe dope on all my fittings. I use the same one we use in the oil furnace installations. The product is called "Jet Lube No. 60". It's a lead base, so if you get some, remember to never use it on domestic water lines, or house plumbing. Whatever you do, DO NOT use teflon tape. I am sure there are lots of other dopes out their that will work, just stay back one or two threads with the dope, so you don't send some into the injectors. Thats the good thing about Jet Lube 60, because it is oil and lead base, it does'nt harden. So if some gets in the fuel lines it will wash right through.

 

[Rockcrusher]

Originally posted by kboettcher

I use a pipe dope on all my fittings. I use the same one we use in the oil furnace installations. The product is called "Jet Lube No. 60". It's a lead base, so if you get some, remember to never use it on domestic water lines, or house plumbing. Whatever you do, DO NOT use teflon tape. I am sure there are lots of other dopes out their that will work, just stay back one or two threads with the dope, so you don't send some into the injectors. Thats the good thing about Jet Lube 60, because it is oil and lead base, it does'nt harden. So if some gets in the fuel lines it will wash right through.

So, whats wrong with teflon tape? Been using it for years; of course keep it back a couple of threads.

 

[kboettcher]

Teflon tape, fuel oil, and vibrations= leaks. The leak will not ussually appear right away, but given time, they will start to weep. Probably would never even notice it in an engine compartment, but in a house on oil furnaces they do start to weep after awhile and ussually the smell will be the first indication in a house. The other thing about teflon tape is when you take the fitting apart at sometime down the road, there is ALWAYS tape that gets left behind inside the female fittings, then when you re-install the male end back into the female end, you now push stray pieces of tape into the lines..... not good . Yes. lots of people use tape, but I personally wouldn't. JMO.

 

[Ncostello]

No Tape!!! Use Permatex 2 or 2A or even the Teflon Pipe Thread Sealant 14 (I think its 14). Some use Never Seize on threads to seal them. It works great on hydraulic lines.



Some threads will be cut as NPTF. Those are NPT with a little "extra" height to the cut so as you tighten them down the thread crushes in the valley and seals it. The F stands for fuel. They usually dont work however.