major brake issue
Thread Starter
Cruising
Joined: May 2014
Posts: 10
Likes: 0
major brake issue
Proud 1st time Vette owner of a 74. having brake issues and needing some insight. Replaced the brake pads in April 2017 and all worked fine about August 2017 started having air in the lines, kept bleeding them, replaced the MC at that point and no change. Stored it for the winter in Utah, got it back out and addressed the issues by bleeding it again, 2 days later air in the system ended up noticing that front drivers caliper had been leaking badly as had another so I replaced all 4 and new pads and bled, 2 days later air again. Replaced MC again 2 days later air again. Short story I have replaced all 4 calipers/pads, MC (3x), rear flex lines, booster and I am still getting air to the front left caliper each time. Replaced that caliper again and 3 days later air in the system again. Just not sure what is allowing air to get in the system?
Any one else w/any similiar issues that can help out. Even my 3rd local brake shop seems to be at a loss (has it now looking some more).
Any one else w/any similiar issues that can help out. Even my 3rd local brake shop seems to be at a loss (has it now looking some more).
Safety Car
Joined: May 2004
Posts: 4,363
Likes: 1,588
From: los altos hills california
Since you're new to this, you may need to know a little more. The brake system in these cars is unique or relatively so in that the brake pads rest on the spinning rotor. If the rotor wobbles, the pistons in turn move in and out in their cylinder bore pumping air into that caliper. So as bashcraft has mentioned, rotor runout may be what you are experiencing. Best checked with a dial indicator.
Thread Starter
Cruising
Joined: May 2014
Posts: 10
Likes: 0
Since you're new to this, you may need to know a little more. The brake system in these cars is unique or relatively so in that the brake pads rest on the spinning rotor. If the rotor wobbles, the pistons in turn move in and out in their cylinder bore pumping air into that caliper. So as bashcraft has mentioned, rotor runout may be what you are experiencing. Best checked with a dial indicator.
Sorry I actually failed to state that I also replaced all 4 rotors as well.
Le Mans Master
Joined: Aug 2006
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From: mount holly NC
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