Gas line thread sealer

[RODRIG3911]

What are you guys using to seal your gas lines?? I have a leak where I have my filter screwed on to my fuel pump (P4070 Carter). I've heard pros and cons on Teflon tape and would like your opinions. Thanks

 

[bmc69]

I never use Teflon tape and won't even allow it in my business shop. My .02.

For general purpose all-around thread sealing, this product is a good one.

http://www.zorotools.com/g/00062063/k-G1245867?utm_source=google_shopping&utm_medium=cpc&utm_campaign=Google_Shopping_Feed&kw={keyword}&gclid=CNC88tiMs7wCFYNi7Aodr04A7g

 

[orygunbou71]

http://www.permatex.com/products-2/...ts/permatex-form-a-gasket-no-2-sealant-detail

Permatex #2 fuel resistant. used it on my rear tank drain plug worked out great!!

 

[Broncobowsher]

The first question should be, what kind of fitting are you trying to seal? Is it a compression fitting? Pipe thread?, O-ring?, gasket? Once you know what the sealing type is then you can address why it is leaking and the proper fix.

Never use teflon tape in a fuel system. If it is tapered pipe thread I use teflon paste, but never tape. Any other fitting should never need any type of sealer. About the only thing worse then teflon tape, silicone/RTV.

 

[RODRIG3911]

Thanks guys. It's a pipe thread style filter screwed into the electric fuel pump. I have it torqued down really tight and it still is leaking a bit. I'll look into your suggestions to see which i think might work best for my application. I appreciate the input

 

[bmc69]

Thanks guys. It's a pipe thread style filter screwed into the electric fuel pump. I have it torqued down really tight and it still is leaking a bit. I'll look into your suggestions to see which i think might work best for my application. I appreciate the input

The permatex sealer I linked above is what we use in high pressure pipe thread applications. Even though it does contain Teflon as a thread lubricant, it is a cyanoacrylate based hardening sealer.

 

[RODRIG3911]

Bmc69 that stuff looks perfect. No tape to come off and plug up my pump . I think I'll go that route

 

[NCW]

What are you guys using to seal your gas lines?? I have a leak where I have my filter screwed on to my fuel pump (P4070 Carter). I've heard pros and cons on Teflon tape and would like your opinions. Thanks

BandAids and Fuel System - just seems wrong to me. If it's tight and still leaks, you have another issue. Either the units were poorly threaded to begin with, one or both were crossthreaded in the assembly process or the body of one may have a small crack.

This is nothing to second guess - dissassemble it all, clean and inspect all parts for improper threads or a crack. Nothing, I mean nothing is worth a patch when life and limb are on the line.

 

[bmc69]

BandAids and Fuel System - just seems wrong to me. If it's tight and still leaks, you have another issue. Either the units were poorly threaded to begin with, one or both were crossthreaded in the assembly process or the body of one may have a small crack.

This is nothing to second guess - dissassemble it all, clean and inspect all parts for improper threads or a crack. Nothing, I mean nothing is worth a patch when life and limb are on the line.

? The use of the proper sealant type on NPT threaded connections is a routine requirement. From teflon paste in low-pressure applications all the way through the expensive sealant types we use in very high pressure hydraulic systems...

The only thing I always add or note is that we do not consider Teflon tape one of those "proper" sealant options.

 

[blubuckaroo]

BandAids and Fuel System - just seems wrong to me. If it's tight and still leaks, you have another issue. Eithe

Sealing tapered threads is correct. I always use Non-Hardening Permatex II. It's gasoline resistant. It also works well on those engine assembly bolts that go all the way through to the water jacket or an oil galley.

 

[70_Steve]

? The use of the proper sealant type on NPT threaded connections is a routine requirement.

^That!^

Tapered pipe threads require some sort of sealant. The choice of sealant is base on the application.

Sealing tapered threads is correct. I always use Non-Hardening Permatex II. It's gasoline resistant. It also works well on those engine assembly bolts that go all the way through to the water jacket or an oil galley.

Me too. Non-hardening #2 Permatex on almost everything. Never had a problem.

 

[Broncobowsher]

And one more, sealer on tapered pipe threads (and only tapered pipe threads) is correct.
Check the pump carefully, you can crack the pump housing if you over tightened it.

 

[anoblefox]

this is what professionals use. A little over 8 bucks from amazon. com
Gasoila Soft-Set Pipe Thread Sealant with PTFE Paste, Non Toxic, -100 to 600 Degree F, 1/4 Pint Brush

 

[RODRIG3911]

I got a better response then i thought i would! I bought some sealant and a brand new P4070 pump just in case. I appreciate all the help guys. I'm not trying to "Bandaid" it, but do it right. I like the idea of the sealer just to be positive it's not going to leak this time. The older i get, the more i want to do it right the first time then spend extra money fixing my half @$S work hahaha;D

 

[jw0747]

...a cyanoacrylate based hardening sealer

any product with a cyanoacrylate base is bound to be good especially if you can spell cyanoacrylate whatever that is.

 

[NCW]

I got a better response then i thought i would! I bought some sealant and a brand new P4070 pump just in case. I appreciate all the help guys. I'm not trying to "Bandaid" it, but do it right. I like the idea of the sealer just to be positive it's not going to leak this time. The older i get, the more i want to do it right the first time then spend extra money fixing my half @$S work hahaha;D

My intent was only that after what seems like a few tries, no manner of tight was getting the job done. My worry was more toward not seeing an actual part failure, gluing it together with only the best intentions, going down the road only to have road vibrations or other activity rupture the fix and some disaster happen. I agree on all other points BTW.