No name on this mc
Thread Starter
Burning Brakes
Joined: Oct 2020
Posts: 859
Likes: 71
No name on this mc
Master cylinder no name leaking in rear bottom buy only gm vendor got this one by me some 5 years back. Just cost me a lot of grief on my 77 as you can see in my numerous posts
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,116
From: Crossville TN
Sorry for your issues. Yep, it is a LOT better [and less costly] to just rebuild the original GM master cylinder, instead of "gambling" on what you will receive with an aftermarket purchase.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
Yes. Likely. Could be.
Just go to your local NAPA and get a rebuilt unit, Delco Remy. Just make sure it fits your exact model year.
If you opt to rebuild your own master, you better know the exact procedure.
If you mess up a caliper rebuild, you still have some brakes and can limp home. No harm / no foul.
If you mess up a master rebuild you could do great bodily damage to someone, yourself or public property.
In other words, you could kill somebody with a faulty master cyl.
Certainly, something to think about when approaching a four-lane intersection, "Red Light"! at 50 mph.
Just go to your local NAPA and get a rebuilt unit, Delco Remy. Just make sure it fits your exact model year.
If you opt to rebuild your own master, you better know the exact procedure.
If you mess up a caliper rebuild, you still have some brakes and can limp home. No harm / no foul.
If you mess up a master rebuild you could do great bodily damage to someone, yourself or public property.
In other words, you could kill somebody with a faulty master cyl.
Certainly, something to think about when approaching a four-lane intersection, "Red Light"! at 50 mph.
Race Director
Joined: May 2006
Posts: 18,707
Likes: 2,573
Race Director
Joined: May 2006
Posts: 18,707
Likes: 2,573
So in this thread you appear to be rebuilding a master and in the thread below replacing the .master.
Can you clarify why you have two different threads?
https://www.corvetteforum.com/forums...er-1977-a.html
Can you clarify why you have two different threads?
https://www.corvetteforum.com/forums...er-1977-a.html
Race Director
Joined: Oct 2000
Posts: 12,662
Likes: 3,118
From: Shamong, NJ
If it's an AC Delco Gold series (Delco #18M91, GM #18030333), it's a real GM Delco master cylinder, not a "knock off". Many of Delco's parts are being made in China today, as well as South Korea, and to a lesser degree than a few years ago, Mexico. The vast majority of aftermarket parts, whether they're Delco, FoMoCo, Mopar, NAPA, or Cardone are being made overseas, and if not in China they're coming from India, Vietnam or somewhere else.
What is a "29969" master cylinder, it doesn't appear to be a GM number? The original casting number for a 77 master cylinder was "5480346". The Chevrolet part number prior to 1980 was 18002069, but was superseded by part number 18005307 in 1980 (casting number remained the same but the mounting holes were changed to metric).
Chevrolet, AC Delco, Lonestar Caliper, CSSB, NAPA, etc.
Who sells corvette brake parts?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Thread Starter
Burning Brakes
Joined: Oct 2020
Posts: 859
Likes: 71
Okay went with the ac gold the rebuild lits were almost the same price so why rebuild it that number on the one i took off came from a corvette vendor and five years leaking. It reminds me of the stainless sleeves in my rebuilt calipers that pitted and the company said evidently your fluid was dirty. Every new item remember means never ever worked. Case closed. Yes i have breaks now and there is no pulling but for how long?