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On a roll
Teflon Tape!
I'm tying up a few loose ends here. A big one is this slow leak I've had on my power steering reservoir. Mine is a bit unique (or so I'm told by the folks at Moroso) as it has pipe thread openings instead of nipple connections. Anyway, the threads were messed up (thanks to my less than expert ability the first time I installed it) so I pulled the tank and am cleaning up the threads with a tap. I don't know what tape I used last time, but it appears to have pretty much turned into goo.
Finally, we're getting to my question. Is there a specific teflon tape that I should use in an environment that includes power steering fluid? I have two rolls of the stuff: one I have no idea, and the other is "PTFE Thread seal tape MIL SPEC T-27730A". I'm hoping that I used the unnamed tape the first time and that the PTFE tape will work this time. Your thoughts and/or opinions?
Mk IV Roadster - #8650 - delivered 7-17-2015 - first start 7-28-2018 - first go-kart 10-13-2018 - licensed and on the road 9-9-19: body/paint completed 3-17-2020.
Complete kit / 2015 Coyote / TKO600 / IRS / Wilwood brakes / Mid-Shift mod / Power Steering / Heater and Seat Heaters / RT turn signal / Breeze radiator shroud and mount
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Seasoned Citizen
Once you have repaired the threads, do yourself a favor and use a high quality thread sealant. Teflon tape is not a thread sealant, in fact there is no place in automotive for the use of Teflon tape -- leave the tape to the plumbers. Teflon tape has caused more problems than it has ever fixed when using it around automotive and hydraulic systems.
I've always had good luck with Loctite 564, it's a thread sealant and locker that will provide superior sealing and resist loosening. But there are others out there that work well too.
Dart Little M 406" SBC 800 HP N/A & 1,100 HP on nitrous, 2-spd Powerglide with trans brake, 6,000 RPM stall converter, narrowed Moser 88 3.90:1 spool with 35-spline gun-drilled axles & Torino bearings, custom parallel four-link, custom tube chassis & roll cage NHRA certified for 8.5-sec (only two FFR Hot Rods have this cert).
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Permatex high performance thread sealant is another good option:
https://www.permatex.com/products/th...hread-sealant/
MkIV Roadster build: Gen 2 Coyote, IRS, TKO600. Ordered 10/24/18. Delivered 1/29/19. Engine installed 8/8/21. First start 9/12/21. First go-kart 9/17/21. Off to paint 4/11/22. Back from paint 12/30/22.
Build thread here.
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Senior Member
FFR #8833 289 FIA 3-link
1965 289, TKO600 from Forte's Parts Connection
Body and Paint by Mike's Auto Restoration
Picked up 3/5/2016, First start 4/22/2017, MA legal 7/11/2018
Build Thread
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"Insanity is contagious" - Joseph Heller
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Senior Member
X3. Ditch the tape. I've always used Permatex thread sealant. Available at your local auto parts store.
Build 1: Mk3 Roadster #5125. Sold 11/08/2014.
Build 2: Mk4 Roadster #7750. Sold 04/10/2017.
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Build 3: Mk4 Roadster 20th Anniversary #8674. Sold 09/07/2020.
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Build 4: Gen 3 Type 65 Coupe #59. Gen 3 Coyote. Legal 03/04/2020.
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Build 5: 35 Hot Rod Truck #138. LS3 and 4L65E auto. Rcvd 01/05/2021. Legal 04/20/2023.
Build Thread. Sold 11/9/2023.
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I use this stuff on every thread that takes a sealant... and nothing has leaked yet.
https://www.summitracing.com/parts/arp-100-9904
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Might be partially due to the male fitting. I would look closely at it and clean up the dings in the threads with a jewelers file. The brass is harder than the aluminum and any dents and gouges in the brass threads will scrape up the aluminum threads you just straightened out.
Here is the pipe thread sealant that Breeze sells.
https://www.breezeautomotive.com/sho...hread-sealant/
I actually like the smell of it. Weird huh?
www.breezeautomotive.com 2005 FFR Mk3 Roadster, 302/340hp, MassFlo EFI, Breeze Pulleys, T5, Aluminum Flywheel, 3-link rear with Torsen Diff and 3.27:1 gears, Power Steering, Breeze Front Sway Bar, SN-95 Spindles with outboard SAI Mod, Breeze Battery Mount, QA1 Externally Adjustable Shocks, Quick Release Steering Wheel, Vintage Race seats, GM Arctic White, Sky Blue Scoop, Hidden Hinges, Billet Aluminum Side-view Mirrors, 2,183lbs wet. 1967 Mustang Fastback, Dark Moss Green, black interior, '67 14" styled steel wheels, 2000 Explorer 302 w 5.0 Cam, Quickfuel 450 CFM, 289 Hi-Po Dual exhaust, C4, lowering springs w Shelby drop.
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On a roll
Point taken! Thank you, gentlemen! I'm off to the parts store tomorrow morning to get some sealant. Either the loctite or the permatex. I'll see what they have.
Mk IV Roadster - #8650 - delivered 7-17-2015 - first start 7-28-2018 - first go-kart 10-13-2018 - licensed and on the road 9-9-19: body/paint completed 3-17-2020.
Complete kit / 2015 Coyote / TKO600 / IRS / Wilwood brakes / Mid-Shift mod / Power Steering / Heater and Seat Heaters / RT turn signal / Breeze radiator shroud and mount
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