someotherguy
Truly Awesome
Tried googling it and the confusion level just got worse, LOL
The replacement water neck on my 7.4 has a spot for a 1/2" pipe plug, as I guess some applications call for a sensor to live there. Application notes on some of the water necks listed on Rock have this note: "May Require 1/2-14 Npsf DrySeal Plug (# 444746)" that "NPSF" and "DrySeal" are what caught my eye.
The suggested plug has a Dorman cross of 090-002 which on Rockauto says - it's NPT. I'm having a hard time wrapping my head around it seems like there's NPSF and NPTF and they are obviously different. NPSF uses an o-ring to seal? NPTF should seal from the interference fit of the taper.
Is it just an error on the Rockauto listings where it calls the thread NPSF, and they really mean NPTF ???
The reason it matters to me is I'm wondering if I can rely on this plug to seal the hole in the water neck without any thread dope/tape. I don't want to go crazy tightening it because it will certainly crack the cast aluminum.
Richard
The replacement water neck on my 7.4 has a spot for a 1/2" pipe plug, as I guess some applications call for a sensor to live there. Application notes on some of the water necks listed on Rock have this note: "May Require 1/2-14 Npsf DrySeal Plug (# 444746)" that "NPSF" and "DrySeal" are what caught my eye.
The suggested plug has a Dorman cross of 090-002 which on Rockauto says - it's NPT. I'm having a hard time wrapping my head around it seems like there's NPSF and NPTF and they are obviously different. NPSF uses an o-ring to seal? NPTF should seal from the interference fit of the taper.
Is it just an error on the Rockauto listings where it calls the thread NPSF, and they really mean NPTF ???
The reason it matters to me is I'm wondering if I can rely on this plug to seal the hole in the water neck without any thread dope/tape. I don't want to go crazy tightening it because it will certainly crack the cast aluminum.
Richard