skydawg Posted August 28 Share Posted August 28 I`m ready to install 4 Aeroquip oil hoses on my ENDT 673.Should I use any Permatex on the threads,or not necessary? Thanks. Quote Link to comment https://www.bigmacktrucks.com/topic/74507-thread-sealant-for-oil-lines/ Share on other sites More sharing options...
Popular Post Joey Mack Posted August 28 Popular Post Share Posted August 28 those fittings are tapered seats that do not require sealant.. if sealant is used on tapered seats like JIC fittings, you run the risk of introducing the sealant into the hydraulic system.. that's a no-no.. any NPT fitting in what your doing can take some PTF dope on them. I dont use tape because I always worry about a string getting into the sytem when I tighten the fittings.. I hope Mark, G.W. and others add thier thoughts as well.. 4 Quote Link to comment https://www.bigmacktrucks.com/topic/74507-thread-sealant-for-oil-lines/#findComment-557762 Share on other sites More sharing options...
Joey Mack Posted August 28 Share Posted August 28 Well,, Skydawg,, I think you got your answer... FJH,Brocky,and Terry.. are guys to pay atention too as well... Too many brilliant guy's on here to name them all in a single post.. jojo Quote Link to comment https://www.bigmacktrucks.com/topic/74507-thread-sealant-for-oil-lines/#findComment-557768 Share on other sites More sharing options...
davehummell Posted August 28 Share Posted August 28 The hose place that I used supplied me with this stuff for anything to do with hydraulic fittings I would smear it on the threads and twist the fittings together I used it on stuff when I couldn't use tape or pipe dope. Quote Link to comment https://www.bigmacktrucks.com/topic/74507-thread-sealant-for-oil-lines/#findComment-557769 Share on other sites More sharing options...
mattb73lt Posted August 29 Share Posted August 29 To me, Teflon tape is a big NO-NO in any automotive application. Pipe dope or thread sealant applied with just enough to accomplish the task and not to excess, where you need to wipe it off when done. So not to repeat, I agree with Joey Mack's statement. Quote Link to comment https://www.bigmacktrucks.com/topic/74507-thread-sealant-for-oil-lines/#findComment-557770 Share on other sites More sharing options...
Freightrain Posted August 30 Share Posted August 30 Anything with a tapered seat does not need sealant. With that said, if the two fittings are dissimilar metals I would suggest never seize or light oil to keep them from galling up. I learned a hard lesson just recently when I had to replace my AC compressor. Seems after 8 yrs the metal line fittings and the aluminum compressor fittings were destroyed when I tried to unscrew them. No easy way to clean the threads on the line fittings, so I had to replace the lines/fittings. The compressor was junk anyway, so the fact it tore the threads on it was moot. Lesson learned, the slightest dab of never seize will make it easier to work on in the future. Stainless is another metal that needs lubricant if two simlar fittings are assembled. Stainless against stainless will gall up very easy! 2 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/74507-thread-sealant-for-oil-lines/#findComment-557820 Share on other sites More sharing options...
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