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Author Topic: Thread sealer  (Read 1600 times)
wal1809
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« on: August 10, 2011, 01:03:18 PM »

What do you guys recomend for sealing the threads on the brass fittings that screw into the block and recieve the fuel line compression fittings?
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« Reply #1 on: August 10, 2011, 02:17:34 PM »

I use teflon tape to seal pipe threads. Sofar Sogood...Cable
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Sofar Sogood
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« Reply #2 on: August 10, 2011, 02:20:58 PM »

don't use on elect sending units. breaks ground. ask BK he knows.  Just a reminder.   Bob
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« Reply #3 on: August 10, 2011, 02:26:22 PM »

I use gas line pipe dope, yellow stuff out of a squeeze tube. 

Brian
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wal1809
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« Reply #4 on: August 10, 2011, 02:49:40 PM »

I'll use the yellow but the white won't hold up to veg oil.  This I know as a fact.
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« Reply #5 on: August 10, 2011, 02:52:28 PM »

I use the fanciest most expensive thread sealer /dope stuff  I can find in the hopes that I won't have future problems....there is a nice orange heavy teflon tape that I think is gas rated that I use, also some of the thread locker products are also thread sealers can't remember the appropriate colors/types, just read the pack.
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« Reply #6 on: August 10, 2011, 02:53:44 PM »

What to use on electrical sending units? Have to replace the oil pres sending unit...Cable
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bevans6
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« Reply #7 on: August 10, 2011, 03:08:44 PM »

Just use a paste type pipe dope on oil pressure sending units.  the point is sometimes (rarely, but it definitely happens) the threads don't cut through the tape and make electrical contact.  They definitely do with a paste type dope.  I  have no idea about the special needs for veggie fuel but if it's so nasty that you need viton hoses and special sealing material I wonder what the heck I am doing eating french fries!.

Brian
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1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
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belfert
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« Reply #8 on: August 10, 2011, 03:16:12 PM »

I bought some stuff last fall or winter called Megaloc I really liked.  The only problem is it turned out to have a very short shelf life.  Six months after I bought I went to use it again and it was super runny and never did set up.  I'm not sure if it getting frozen was the problem or not.
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Brian Elfert - 1995 Dina Viaggio 1000 Series 60/B500 - 75% done but usable - Minneapolis, MN
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« Reply #9 on: August 10, 2011, 03:35:54 PM »

Permatex  59214 for me liquid Teflon best thing since sliced bread price is out of the world over 10 bucks a tube but does the job on anything 


good luck
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eddiepotts
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« Reply #10 on: August 10, 2011, 03:44:27 PM »

At Shell we are not allowed to use Teflon tape on anything but water piping and it is special bought. The problem with it is the next time you take your fitting out you will leave fine Teflon threads in your system. It can plug injectors or wipe out Babbitt bearings. We use locktite Teflon paste. Not sure the number because I see it everyday and don't pay attention. I could go to the garage and look if anyone is intrested. I do know that it is only good for a certain temps then it will just melt out. As far as shelf life it does say to kneed the tube before you take the cap off and mix back together.
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« Reply #11 on: August 10, 2011, 04:07:01 PM »

I will never use teflon tape again. Too many problems with it, pieces getting stuck in valves and the like. I always use a pipe dope, Permatex and Loctite work great.
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« Reply #12 on: August 10, 2011, 04:09:35 PM »

Loctite 242 Thread Locker and Sealant - Medium Strength
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« Reply #13 on: August 10, 2011, 04:58:37 PM »

I bought some stuff last fall or winter called Megaloc I really liked.  The only problem is it turned out to have a very short shelf life.  Six months after I bought I went to use it again and it was super runny and never did set up.  I'm not sure if it getting frozen was the problem or not.

I use Megaloc also. If it freezes, it's no good.

TOM
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« Reply #14 on: August 10, 2011, 05:35:04 PM »

I guess I should have put the Megaloc in the box of stuff I move from the garage to the basement storage room every fall.  Other thread sealers haven't seemed to mind freezing so I didn't think about it.
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Brian Elfert - 1995 Dina Viaggio 1000 Series 60/B500 - 75% done but usable - Minneapolis, MN
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