Started by www.eldorado-seville.com, January 11, 2012, 11:33:08 AM
Quote from: cadillactim on January 11, 2012, 12:48:50 PMGeraldIs the rod from the booster to the master cylinder adjustable? If so, it may need lengthened for the brakes to reduce pedal travel.
Quote from: cadillactim on January 11, 2012, 12:48:50 PMYou may also need to check that the wheel cylinders are moving properly. Any bad rubber lines can restrict fluid flow and not allow the wheel cylinders to have enough pressure applied to the brake shoes.
Quote from: cadillactim on January 11, 2012, 12:48:50 PMAlso make sure the brake shoes are adjusted properly, as that will cause a low pedal.
Quote from: cadillactim on January 11, 2012, 12:48:50 PMYou can check the brake booster to see if it is leaking vacuum. First, with the car off, gently put your foot on the brake pedal and start the car. The pedal should drop a little because of the vacuum in the booster. Next, have the car run a few minutes, turn it off and wait about 3 minutes. Then pull the booster vacuum line check valve out of the booster. You should hear a loud gush of air leaving the booster. If not the booster is leaking.
Quote from: Bob Hoffmann CLC#96 on January 12, 2012, 01:24:27 PMI don't want to hijack this thread but I have a similiar problem. I need a Bendix MC rebuild kit for my 68 Eldo. No one seems to have it. Any ideas? Thanks, Bob
Quote from: Gene Beaird on January 12, 2012, 09:10:56 AMAnd boosters can leak a bit, and still work, but if you're getting no vacuum boost with the engine running, the booster may be defective. Pull the vacuum hose and plug the port on the engine and try to move the car in the driveway. If there's no difference, you have a defective booster.
Quote from: Bob Hoffmann CLC#96 on January 13, 2012, 07:10:51 PM It still has the original stencil which says 93D. Is D for Delco? It looks like the 2 halves are Delco style also. The MC does not have the bump on the bottom. The MPB also refers to a 2 letter stamp on a Delco MC. Does anyone know exactly where it's located? Thanks again for all the help so far. Bob
Quote from: Gene Beaird on January 13, 2012, 11:09:06 AMThe USA Parts MC does NOT look like the OEM MC. That's not to say it won't work. Additionally, it looks like the RockAuto assembly you installed on the car has a different MC than what came off. The MC bleeder screws do not look correct. Again, that's not to say that replacement MC won't work. I'm betting that the hydraulics and vacuum assist are functioning properly, but you have a replacement MC with a smaller bore than your OEM MC. You can probably verify by removing the nuts that hold the MC to the vacuum booster and gently pulling the MC away from the booster so you can get some calipers on the back of the MC to measure the bore of the cylinder. Then pull the MC off the OEM assembly and compare. It may be better to first pull the MC off the OEM booster, so you can see what and how to measure, then do the one on the car. Hopefully, you have enough flex in the brake lines that you can move them without having to bend things much. Either that, or just disconnect the brake lines off the MC and pull the MC. If you do that, you may want to suck as much fluid out of the MC as you can so you don't pour fluid over everything ruining paint. The assembly you pulled off your 67 looks just like the MC I replaced and the booster I restored on our 68 Calais.
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