Boost gauge sender sealing.

[thx997303]

I'm about to install a boost gauge, and I'm going to install the adapter in the snail of my ATS turbo using the plug that's there.

My question is, should I seal the adapter somehow? If so, what should I use? Probably a stupid question, but I can't find the answer.

 

[Wyreth]

Always remember, there are no stupid questions, just silly people who don't ask the question.

yes you should seal it.

http://www.homedepot.com/p/Rectorseal-1-75-oz-5-Pipe-Thread-Sealant-25790/100144191#.Uh7lwH8piM0

I would use that^^ I use it for damn near everything.

no really, the stuff is amazing.

 

[thx997303]

Would TFE paste work? I have that. Seems to say it's good to 4 and 500 * depending on application.

 

[Agnem]

Yes. Either TFE paste or tape will work just fine.

 

[icanfixall]

I agree with whats posted above. This information may help others understand something about tapered pipe thread like this. All the plugs found in our engines oil galleys and water jackets have a tapered pipe thread. What that means is the threads have a taper cut to them and they seal by threading into the fitting. The tighter the fitting it threaded into the other fitting the better the seal is. Most tapered pipe threads do not require any thread sealant. But its a good idea to use it for that just in case issue. Who knows where the fittings were made. Todays garden varity of manufactures around the world cut down on the quality to save a buck. I have found some really crappy fittings that had tiwan printed on them. China and india are right up there too. Look closely at what your buying. I'm thinking you intake hat is aluminum and the boost fitting is brass. You can screw that in with nothing sealing the threads. The metals are soft enough they will seal fine. But why chance it with a boost leak. Just snug down the fitting and watch for leaks. Any seapage around the fitting is a leak. Just tighten the fitting up a little. Wash off the leaka nd drive it. Check again. The amount we tighten a threaded fitting in a pipe thread has a length. Usually three threads on the fitting are showing. Even that depends on how deep the threads were cut on the other fitting. Drilling a hole and cutting a tapered thred in it takes practice. Cut it too deep and the parts will never seal. Too shallow and the seal wont happen either. Utube has plenty of viedos on how to cut tapered pipe threads. Its a feel mostly.

 

[thx997303]

That's some good information. Thanks for sharing.

I knew NPT threads were tapered, but thought it would be a good idea to check anyway.

TFE paste it is.

 

[dgr]

Get in the habit of not using teflon tape on anything except for water pipe. Then you'll never do something stupid and use it where it shouldn't be used which is everywhere else. Teflon tape is spectacular at plugging really small holes and causing really expensive damage. It may have been here or maybe on another board but someone posted about teflon tape taking down an entire assembly line.

Like Wyreth I like rectorseal 5. Another member looked into it and it's diesel rated. Actually it's rated for all these things.
RectorSeal® No. 5® is recommended for pipe carrying:

Acids, Dilute Gasohol (unleaded Gasoline and 10% Alcohol) Natural Gas
Air, Compressed Heating oils Nitrogen, Gaseous
Ammonia- Gaseous, Liquid Helium, Gaseous Petroleum Solvents
Aliphatic Solvents Hydraulic Oils Soap, Liquid
Caustic, Dilute Hydrogen, Gaseous Steam
Cutting Oils (Low Aromatic) Inert Gases Vegetable Oils
Diesel Fuel Oil Kerosene Water (Hot or Cold)
Freons Liquified Petroleum Gases (Butane, Propane, Mixtures)
Gasoline (Leaded Unleaded) Mineral oils
Not recommended for oxygen.