Engine/Transmission (1998.5 - 2002) Thread sealant compatable with oil system

[JCyrbok]

Replacing Amsoil Dual by pass with a Single by pass. I'm getting ready to start making up the fittings. I would rather not use Teflon tape for the threads on the fittings so that If I every have to take a fitting off I dont have to worry about tape in the oil system. Also would hate to burn a piston if a cooling nozzle got clogged.



I was thinking that one of the paste type sealants would be better. If it did get into the system it would have a better chance to make it to the filter to get caught.



I currently have in my mess of stuff in my basement:



Rector Seal #5 which is safe on oil and fuels, up to 12K psi, and good for -50 to 400deg F temp wise. ( how hot does the oil get?)



I also have regular old Teflon "Pipe Dope" paste which is good for basically the same as the Rector Seal except lower PSI ( still well with in the needed) and claimed to 500Deg F.



ANyone see a problem with using either of the paste sealants? WHich one would be better? Anyone have any other suggestions? ALso any concern if the paste were to get into the oil?



Thanks in advance,

J-



ps watch the classifies for a Dual by pass and related assesories ( see sig)

 

[2-ND TIME]

Pipe sealent

Oldest trick that I know is to start the tape up the two threads from the end ?????

 

[JCyrbok]

2nd time,



Yeah thats how I do it when I do plumbing, but my concern is that if i have to remove a fitting, for what ever reason, there is tape left in the female threads, that could be pushed into the system that the fitting is re-installed.



Plus I like that I can fine tune the fitting position easier with the paste; ie back it out a bit to get the right position.



Thanks for yor reply though,



J-

 

[parcher]

Go to the Dodge dealer and buy a can of "Mopar Gasket Sealant". It's a spray can and has many uses. It's oil, water friendly.

 

[illflem]

I never use Teflon tape for the same reasons you describe plus it doesn't stand up to heat well. Permatex #2 or antiseize works best for me. Both from any auto parts store.

 

[RustyJC]

Old oil field trick for the past 50 years - if you're sealing petroleum products, reach for the Permatex #2.



Rusty

 

[JCyrbok]

Permatiex #2

Went with the Permatex #2. thats the black stuff, tube has a big orange #2 and also " Form A Gasket Sealant", correct?



Wouldnt u know that I finished making my fittings BEFORE I read the destructions for the permatex. I did not wait the "few minutes to let it become tacky" before I made my connections. Is there any problem with this. I assume that it will be OK but I have never used this stuff before. I will not be running lines etc until sunday or monday so it will have till then to set up. But once I mount the filter and lines I will need my truck in a couple of hours and will need to check for leaks, is there a problem with running oil through the lines fairly soon after the permatex is put on and fittings secured?



This stuff seems pretty good and have heard nothing but good comments about it.



Will I have a problem after it is all set and say I need to remove or repostion a fitting?



Thanks in advance,

J-

 

[JohnE]

The old brown goo is ok on threads. I prefer PST as it is limited to and designed for threaded applications only. Teflon tape is great for a fitting you assemble and forget such as water lines. It should be called plumber's tape, but that expression is taken with metal perf tape.



The biggest trick with any liquid/paste thread sealant is to make sure you drive it deep into the threads before assembly. You also have to vent the system. Air pressure in a closed system will drive the thread sealer back out of the fitting.



I've never had a problem by not waiting for a permatex product to tack before asembling. It usually seals for me and the failures are always other problems.



With any sealers you have a limited time to adjust fittings. It varies from a few minutes to hours depending on the product.

 

[Hohn]

I use Permatex #2 for somethings, but not very often. It is good stuff. I don't think you will have any problems about not waiting for it to become tacky.



I use RTV for a lot of things-- the Copper RTV that permatex makes is GREAT stuff.



Permatex makes an actual thread sealant that comes in a little white tube (like loctite). That's what I use for all NPT-type connections. It is the best choice overall, since that's what is was designed for. It tends to separate in the tube, so I knead it a bit before I use it. It worked great on my FP gauge rig-- no leaks at all.



Don't worry about high temp so much for your oil. You will probably never see over 260°F oil temp. Also, keep in mind that whenever you add longer oil lines (like a bypass setup), all the extra surface that the oil must flow over creates a larger heat sink effect, so your oil will be quite a bit cooler than the temp you see on a gauge. The built-in oil cooler, the filter, etc... all that dumps a lot of heat out of the oil. Shoot, even the pan radiates heat.



If you aren't using synthetic, you will KNOW if your oil runs over 260° or so because soon you won't have oil in your pan-- it will be asphalt! Dino oil is great, but extreme temps are not its friend.



You are wise to stay away from the tape. IMHO, I would only use it for home water and sewage plumbing and nothing else.





HOHN

 

[me4osu]

New oilfield trick for the last 15 years is to reach for the teflon PASTE. Properly applied, it will seal a lube system quite well, and not risk particulate contamination. We usually use it on instrumentation fittings because we don't want the tape bits clogging up I/Ps and other stuff.



Doesn't work so swell for >1200 psi NG though.



Our shop typically slops it all over everywhere but the threads.

 

[pdolan]

For semi-permanent small pipe fittings (i. e. those things you don't really intend to take apart - like my bypass filter head) I use Loctite 262. You need to clean the surfaces first, but it is a pretty reliable way to seal. The Permatex I reserve for larger fittings. I have had little success with most PTFE preparations (most of my stuff uses napthenic oil - very high solvency). If you are using pipe tape, DO NOT use the thin white crap. Get "petro-tape" or "gas fitters tape" from you pipe supplier, and avoid the first thread on the fitting. This stuff is very heavy and seals like a darn.



Pat

 

[RustyJC]

Re: Permatiex #2

Originally posted by JCyrbok

I did not wait the "few minutes to let it become tacky" before I made my connections. Is there any problem with this?

Nope. I think the "tackiness" has more to do with holding gaskets in place than its ability to achieve a seal.



Permatex #2 is non-hardening, so you should have no difficulty with disassembly of the fittings down the road.



In response to some other posts on this thread, I never said that other products won't work. I just said that experience proves this product will work reliably.



Ya pays yore money and ya takes yore choice. Use whatever makes ya feel good.



Rusty

 

[JCyrbok]

Thanks

Thanks for all the replies and Info guys. I went with the Permatex 2 as it came highly recommended from many different sources. All my fittings are made up, now all I have to do is find time to do the actual install!



Thanks again

J-