C3 Rear Flexible Brake Line Replacement
Thread Starter
Heel & Toe
Joined: Apr 2016
Posts: 20
Likes: 1
C3 Rear Flexible Brake Line Replacement
I have bought new rear flexible brake lines. When installing them into the brass block they bottom out early (about 1/16 inch). I am being told that I must also replace the brass block. This does not seem right. Is this correct or what might the issue be?
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
I can't see a thing. But just guessing, sounds like a flare is in the way of an incorrect hose, maybe?
Update;
And no, its not right. You do not have to change-out the brass. Those things will last a century.
I question the new part. I question the person who sold it to you.
A 1/16 of an inch is not many threads for a leak-free joint / connection Somethings not right here.
Update;
And no, its not right. You do not have to change-out the brass. Those things will last a century.
I question the new part. I question the person who sold it to you.
A 1/16 of an inch is not many threads for a leak-free joint / connection Somethings not right here.
Last edited by HeadsU.P.; Jul 16, 2021 at 04:56 PM.
Race Director
Joined: Nov 2006
Posts: 13,282
Likes: 7,863
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
It's been awhile sense I changed all of mine. But what makes you think the thread should bottom? Thought these were inverted flare.
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,335
From: North of Toronto - Ontario
Never heard of having to replace the splitter block to put new lines on.
Check and measure, they are inverted flares, they should "bottom out" before the threads run out or it'll never seal
M
Check and measure, they are inverted flares, they should "bottom out" before the threads run out or it'll never seal
M
2026 Loser of the Year
Joined: Sep 2013
Posts: 36,607
Likes: 7,053
From: New Or-leens Loo-z-anna
Copper washers are used on older cars between the caliper and the threaded end of the hose.
Do your old hoses have smashed copper washers on the threaded ends?
The camera is your friend.
Team Owner
Joined: Jul 2004
Posts: 40,422
Likes: 792
From: Redondo Beach, California
Bottoming out after screwing in a 1/16 of an inch? Isn't this the symptom of incorrect threads? New hose.......metric threads?
Also about those brass blocks. At least for new SS lines, the recommendation is to install new brass blocks. That's what I've read, so that's what I've always done. The procedure, for SS, is to torque the nut up tight, back off a flat, torque up tight again, back off a flat, then torque up to the full recommended torque. This is to work the SS surface into the brass surface for a leak proof seal.
Also about those brass blocks. At least for new SS lines, the recommendation is to install new brass blocks. That's what I've read, so that's what I've always done. The procedure, for SS, is to torque the nut up tight, back off a flat, torque up tight again, back off a flat, then torque up to the full recommended torque. This is to work the SS surface into the brass surface for a leak proof seal.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,235
Likes: 9,376
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Are they in backwards. THe set I got from CSSBinc bolted right in. No issues at all. Must be the wrong part or cheap chinese crap. Did you buy it from autozone or ORiellys. Maybe Amazon? Most of these places are going all chinese. I've gotten my calper rebuild kits and all my Stainless brake lines form these guys. Every bit replaced except for the blocks. Always fit perfectly and never an issue....unlike the parts stores that always sell me something that is supposed to fit my big block....like motor mounts that dont fit....How can you screw up a motor mount???
Ebay store front
https://www.ebay.com/usr/cssbinc?_trksid=p2047675.l2559
store page
https://www.ebay.com/str/cssb
Ebay store front
https://www.ebay.com/usr/cssbinc?_trksid=p2047675.l2559
store page
https://www.ebay.com/str/cssb
