Thread sealer

[wal1809]

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?

[fe2_o3]

I use teflon tape to seal pipe threads. Sofar Sogood...Cable

[robertglines1]

don't use on elect sending units. breaks ground. ask BK he knows.  Just a reminder.   Bob

[bevans6]

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

Brian

[wal1809]

I'll use the yellow but the white won't hold up to veg oil.  This I know as a fact.

[zubzub]

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.

[fe2_o3]

What to use on electrical sending units? Have to replace the oil pres sending unit...Cable

[bevans6]

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

[belfert]

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.

[luvrbus]

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

[eddiepotts]

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.

[Dreamscape]

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.

[Lee Bradley]

Loctite 242 Thread Locker and Sealant - Medium Strength

[oldmansax]

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

[belfert]

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.

[rcbeam]

When I redid all my fuel line connections at the filters when I converted to spin-on, I used the liquid teflon... bought it at Home Depot.  Can't remember the brand, but worked really well.  If I ever have to take those connections loose, I doubt I'll have any trouble. 

Worked for me.

[wal1809]

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

Permatex 59214 it will be.

[JohnEd]

I'll use the yellow but the white won't hold up to veg oil.  This I know as a fact.

There is a liquid dope, white in color, that is speced for fuel and oil.  The uys that install and service gasoline station pumps and plumbing use it.  I had/have some and I just went through my shop looking and came up empty.  It exists and I first heard about it on the BioD forums.  Many guys had all their joints start leaking and it was a hot topic for a while.

John

[oldmansax]

The reason I am sure about the Megaloc is I bought a brand new bottle one afternoon for piping up a boiler. Used it that afternoon. Put it in the trailer over night to finish the job with the next morning. It was 10 degrees that night. Next morning the Megaloc was some kind of creamy goo that would not work ....... after I thawed it out.

TOM

[JohnEd]

Oh, yes, and lest I forget:  The liquid sealer acts like a lubricant.  When the nice young "Mexican" showed up from the gas company to install my meter and start my service, I never thought I would learn something.  Racial prejudice, maybe a little, but I was watching him to make sure he didn't do anything wrong.  The third time he mad a union with that 2 inch pipe I was certain that he wasn't putting barely anything "into" the pipe wrenches.  He was pretty small, few Mex are in the Pro B Ball roster and I have never seen one that could pass for a Sumo Wrestler, and still he made it look almost nonchalant.  I will never use that Teflon Tape sealer ever again.  I stop turning the liquid doped threads because they bottom out, not because it gets really hard to turn.

Oh, yeah, those little threads of cut and crushed teflon that is inside my pipe when i take it apart have always given me pause.

John

[chev49]

like the Gasoila soft or hard, etc thread sealants...(for service station, etc)