Thread sealant on turbo

[Mista Lee]

Is permatex ultrablack ok to use as a sealant on my oil and coolant lines?
If not, what do you guys use?

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use NOTHING! the fittings should be flared so that they seal on theyre own. no thread sealant is needed

[Mista Lee]

Sweet. Thanks for the quick response

[codyace]

use NOTHING! the fittings should be flared so that they seal on theyre own. no thread sealant is needed

That's assuming he's got A/N lines...but even then, you should use hi temp sealant on the opposite end where they thread into the turbo.


I use regular permetex ultra gray or copper in those areas.

[japslapsilvia]

actually the fittings on the turbo, water lines, are parallel thread. which means that the seal is not created by the threads themselves. you need to use a crush washer to seal. nothing more is required.

[[email protected]]

actually the fittings on the turbo, water lines, are parallel thread. which means that the seal is not created by the threads themselves. you need to use a crush washer to seal. nothing more is required.

sorry OP, i assumed you were using AN lines. if using OEM, use copper crush washers

[japslapsilvia]

sorry OP, i assumed you were using AN lines. if using OEM, use copper crush washers

even with AN lines. The fitting that screws in to the turbo needs a crush washer.

[codyace]

even with AN lines. The fitting that screws in to the turbo needs a crush washer.

Ah, you are right I had a brain fart.

HOWEVER with AN lines you will need some sort of sealant on the feed line, as it's NPT. The return as well, as if it's a flange setup you'll need copper RTV, or if it's a flange with NPT female input, you'll need copper rtv there as well.

But yes for the water inlets it uses a crush washer.

[japslapsilvia]

Ah, you are right I had a brain fart.

HOWEVER with AN lines you will need some sort of sealant on the feed line, as it's NPT. The return as well, as if it's a flange setup you'll need copper RTV, or if it's a flange with NPT female input, you'll need copper rtv there as well.

But yes for the water inlets it uses a crush washer.


huh??? there are no NPT fitting on SR...all the water lines for SR use parallel thread.

block fitting and both turbo fittings, as well as s-14 water neck. They need a crush washer.

The Oil drain line is BSPT in which case u would use some type of sealant.

As for the oil feed line. The block side is parallel thread. so it would use a crush washer. regardless if AN line or stock.

Turbo side of oil feed line requires NO type of sealant. its it sealed with and Inverted Flare, (like a brake line)

Another thing to note. AN lines over time can develop scratches on the flare (the flare is the seal for the fitting) bigger scratches will cause leaks. there is a seal designed soley for AN/JIC 37* flares calles Seco 7 seals.

[codyace]

huh??? there are no NPT fitting on SR...all the water lines for SR use parallel thread.

block fitting and both turbo fittings, as well as s-14 water neck. They need a crush washer.

The Oil drain line is BSPT in which case u would use some type of sealant.

As for the oil feed line. The block side is parallel thread. so it would use a crush washer. regardless if AN line or stock.

Turbo side of oil feed line requires NO type of sealant. its it sealed with and Inverted Flare, (like a brake line)

Another thing to note. AN lines over time can develop scratches on the flare (the flare is the seal for the fitting) bigger scratches will cause leaks. there is a seal designed soley for AN/JIC 37* flares calles Seco 7 seals.

When I used feed I meant in regard to the NPT fitting atop for oil feed. That does require sealent. I will admit I do not recall on OE turbos, but on aftermarket it's certainly npt. I'm often one to type half of what I'm thinking, so excuse me on that.

I didn't realize the block was a BSPT tap, but then again that assumption is probably from my FWD backing, and us just tapping the pan with a 1/2 NPT boss and then and then usin a 5/8th male on the other side.

And most certainly good information on the seal. You see this quite often with Steel to aluminum (or vise versa) AN/JIC fittings.