Wilwood brake caliper fittings

[tbl100]

I'm getting ready to bleed my Wilwood brakes and I'm checking all the lines and fittings. Should I be applying some sort of thread sealer on the fitting going into the caliper? or is just tightening it down enough.

127765

Thank you,
Tim

[Fixit]

Those appear to be tapered "pipe" fittings... some will argue yes, some no.

IMO if you're very careful to NOT get sealant or teflon tape on the bottom 3 or 4 threads (where it could migrate into the caliper/chamber) a little bit wouldn't hurt.

[toadster]

I got some Permatex by recommendation of others on here

Permatex PTFE
https://i.imgur.com/bSkd5CG.png?1
(https://www.amazon.com/Permatex-80632-Thread-Sealant-PTFE/dp/B000HBNTGY/ref=as_li_ss_tl?dchild=1&keywords=permatex+teflon&qid=1588640857&sr=8-1&linkCode=ll1&tag=cobradreams-20&linkId=7708c23cf5fea09741555b17ab9cf402&language=en_US)

[edwardb]

The threads into the caliper on those Wilwoods are 1/8-27 NPT. It's a Wilwood 220-6412 if you want to look up and confirm. Since national pipe thread (NPT) fittings by definition seal via the tapered threads, thread sealant is a good practice. X2 on a good product like the Permatex mentioned. Negatory on Teflon tape. Especially for brakes. This is a decent explanation of NPT fittings and how to install them: https://www.pegasusautoracing.com/document.asp?DocID=TECH00097. Note the other side of that fitting is a tapered seat metal-to-metal -AN fitting. No sealant on those kinds of fittings.

[tbl100]

Ok, thank you very much. I'll apply the Permatex product.

[DavidW]

Wilwood tells you to use tape in the installation directions.

[edwardb]

Wilwood tells you to use tape in the installation directions.

True enough. Many on this forum, and a bunch of others I've reviewed, say not to use Teflon tape on anything brake related. The Pegasus Racing link I posted previously said the same thing. Didn't pick it for that reason. I just find their tech postings informative so provided for the OP. In the end, builders choice I guess. Mine will continue to use Permatex, which BTW I've never had any leak.

[richtersand]

Hi all, quick question piggy backing on this thread. The FFR installation instructions call for crush washers, and I have seen some chatter on the need for crush washers in wilwood applications (MC, I think?). The front wilwood flex lines didn't come with crush washers. Since there is an NPT fitting, I thought I would ask the question whether I need to use a crush washer on that? Thanks in advance!

Cheers,
Matt

[Boydster]

No crush washers on NPT fittings. Crush washers are used on non-flared, non-tapered fittings, like banjos.

[richtersand]

No crush washers on NPT fittings. Crush washers are used on non-flared, non-tapered fittings, like banjos.

Got it, thank you sir!

[GTBradley]

I used no sealant on any of my Wilwood fittings and none of them leak. Only one needed tightening after filling the system and adding pressure. To me, simpler is better.