Probably a Silly Brake Fitting Question

Maintenance advice to keep your Spider in shape.
User avatar
RRoller123
Patron 2020
Patron 2020
Posts: 8179
Joined: Sun Nov 13, 2011 2:04 pm
Your car is a: 1980 FI SPIDER 2000
Location: SAGAMORE BEACH, MA USA

Probably a Silly Brake Fitting Question

Postby RRoller123 » Thu Apr 13, 2017 9:58 am

This may be obvious, but I thought I would ask the assembled masses:

I assume that in reinstalling new brake fittings to the Master Cylinder, and to the junctions at the line's opposing end, that these connections are made absolutely dry? No micro film of brake fluid, no anti-seize, no Teflon tape, etc. Nothing. Just dry metal on dry metal? Correct?

It would explain why they commonly freeze up and are so hard to remove.

BTW, here is pretty good visual of the ISO Metric Bubble Flare, with a couple of critical dimensions illustrated:

http://www.fedhillusa.com/webnuts/common%20flares6.pdf


Pete
'80 FI Spider 2000
'74 and '79 X1/9 (past)
'75 BMW R75/6
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/STD BED
2002 Edgewater 175CC 80HP 4-Stroke Yamaha
2003 Jaguar XK8
2003 Jaguar XKR
2021 Jayco 22RB
2019 Bianchi Torino Bicycle

User avatar
kilrwail
Posts: 1099
Joined: Wed Mar 04, 2009 6:49 am
Your car is a: 1978 Fiat 124 Sport Spider
Location: Perth, Ontario

Re: Probably a Silly Brake Fitting Question

Postby kilrwail » Thu Apr 13, 2017 5:28 pm

Normally they're completely dry. A bit of anti-seize probably wouldn't hurt. There's lots of thread, so you don't need to use max torque.
_____________________________________________________________
Peter Brownhill

1978 Fiat 124 Sport Spider - original owner
1977 Porsche 911S - track car
2022 Ram 4 x 4 - hauler
PCA National Instructor and Motorsport Safety Foundation Level 2 Instructor

User avatar
Nanonevol
Patron 2018
Patron 2018
Posts: 828
Joined: Thu Nov 13, 2014 9:17 am
Your car is a: 1977 Fiat 124 Spider
Location: Medway, Massachusetts

Re: Probably a Silly Brake Fitting Question

Postby Nanonevol » Thu Apr 13, 2017 6:30 pm

I did some brake work recently and was surprised how much pressure the fluid comes under. I guess I didn't make a flare perfectly and had fluid coming out - past all those threads.
1977 Fiat Spider
1985 Jaguar XJ6
1967 Triumph Bonneville (hard-tail chopper)
1966 BSA Lightning

User avatar
So Cal Mark
Posts: 13839
Joined: Wed Jan 25, 2006 3:45 pm
Your car is a: Fiat
Location: upland, ca.

Re: Probably a Silly Brake Fitting Question

Postby So Cal Mark » Thu Apr 13, 2017 10:49 pm

the threads don't seal, it's the flare that has to seat to create a seal
Mark Allison
allisonsautomotive.com Fiat and Alfa Romeo parts and service. Performance parts our specialty!
Headers, ignitions, wheels, cams, flywheels
starsmark@hotmail.com 909-981-3566

User avatar
RRoller123
Patron 2020
Patron 2020
Posts: 8179
Joined: Sun Nov 13, 2011 2:04 pm
Your car is a: 1980 FI SPIDER 2000
Location: SAGAMORE BEACH, MA USA

Re: Probably a Silly Brake Fitting Question

Postby RRoller123 » Fri Apr 14, 2017 6:53 am

So I will use a little anti-seize, but only back away from the business end of the thread. Thanks all!

Pete
'80 FI Spider 2000
'74 and '79 X1/9 (past)
'75 BMW R75/6
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/STD BED
2002 Edgewater 175CC 80HP 4-Stroke Yamaha
2003 Jaguar XK8
2003 Jaguar XKR
2021 Jayco 22RB
2019 Bianchi Torino Bicycle


Return to “General Maintenance”

Who is online

Users browsing this forum: Google [Bot] and 5 guests