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Old 10-15-2021, 06:57 PM
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Angry Wilwood calipers leaking at fittings

Anyone know how to stop Wilwood calipers leaking at the NPT fittings? I've tightened one down to point of breaking and it's still leaking during air up testing (low PSI). Not sure if Teflon tape or Permatex hydraulic sealant is the right approach. Again these are newer 1/8-27 NPT fittings on their 4 and 6 piston calipers. Looks like they used some type of sealant on the bleeder screw bases....

Thanks in advance...Ron
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Old 10-16-2021, 08:01 AM
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I have always used PTFE paste. I shy away from the tape because one loose piece of tape in the system turns into an instant headache.
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Old 10-16-2021, 09:25 AM
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I have used ARP Thread Sealant successfully.
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Old 10-16-2021, 11:08 AM
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I used these on any connections which isn’t flared.

https://shop.advanceautoparts.com/p/...E&gclsrc=aw.ds
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Old 10-16-2021, 03:43 PM
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Thanks guys for all the replies, I actually tried the same Permatex Thread sealer w/Teflon that Joeko23 recommended. Will let it cure a couple of days before air pressure testing again. Ron
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Last edited by redfire69; 10-19-2021 at 07:26 AM.
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Old 12-04-2021, 10:02 PM
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Talking Loctite 262

Not sure how this ended up turning out for you? In the event you still possibly have any troubles, or moving forward towards the future, I have seen nothing that beats the red Loctite 262 as a sealer for this type of application. It sets rather quickly, does not leave the possibility of any "hard floaters" in the brake system (ABS system safe), and holds infinitely well across the test of time and extreme abuse.

If you want to see how good this stuff works, put a bit on the side of a coin or washer, then simply lay it down onto a metal surface of any sort, even if it is somewhat of an unprepared surface. Wait about a half hour, then marvel at what it takes to get that coin or washer to come loose - this gets everybody I have shown this to. The last one I did not too long ago was a 5/16 USS washer straight out of a bin onto the flat anvil area of a vise (only wiped the oily dirty surface off with a rag - no solvent). 10 minutes later my guy Steve was marveling at how the slight excess that splooged out wouldn't set, but hell if he could get that washer loose (was rather funny). The science of anaerobic sealers is cool = oxygen keeps it from setting.

I know this will convert some readers into looking at this stuff for its exceptional sealing properties, despite its primary purpose of locking threads - it is listed as being able to seal a gap fill of 0.005" Don't be concerned with not being able to disassemble a fitting if needed in the future - it will come back apart if needed without extreme efforts.

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Old 01-12-2022, 07:40 AM
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After using the permatex thread sealer the system holds air for a couple of hours, hoping it just leaks down from the power bleeder. No leaks detected with the soapy water trick. Holding off on bleeding the system just in case I have to swap to heavier coils in the front. Thanks for all the replies - Ron
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Last edited by redfire69; 01-12-2022 at 07:43 AM.
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Old 01-12-2022, 01:43 PM
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Appreciate the followup info.
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