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Old 02-24-2009, 02:40 PM
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68 El Camino brakes

I was helping a friend swap out a leaky master cylinder on his 68 el Camino. He had purchased a larger one to accommodate the disk brakes he had put on last year. The parts store assured him it was the right one for that application. Well once put pulled the old one off and inspected the two, we noticed that the older one had a much deeper well for the metal rod to fit into. Obviously the new one's well was too shallow. We contemplated cutting the rod but decided to post before we do something drastic like that. Has anyone run into a similar problem and what did you do to fix it?
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Darrin
www.networxcomputer.net/elky.html

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Old 02-24-2009, 03:35 PM
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They make a rod that is adjustable.
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Old 02-24-2009, 03:45 PM
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these guys might be able to help you. http://store.summitracing.com/egnsea...DS=1&N=700+115

Last edited by eloc431962; 02-24-2009 at 03:57 PM.
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Old 02-24-2009, 04:33 PM
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Quote:
Originally Posted by eloc431962
these guys might be able to help you. http://store.summitracing.com/egnsea...DS=1&N=700+115
Disk brake master cylinders for the 68-72 A-body cars are cheap and readily available. Just get the right one. Don't waste your time screwing around with pushrods, etc.
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Old 02-24-2009, 06:17 PM
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Quote:
Originally Posted by joe_padavano
Disk brake master cylinders for the 68-72 A-body cars are cheap and readily available. Just get the right one. Don't waste your time screwing around with pushrods, etc.
Joe is right you would be better of getting the right mc.just take your old one with you if you have to.the pushrod thing well i was just trying to help. some people dont relize things like that are available. cole

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Old 02-25-2009, 11:02 AM
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Thanks for your help guys. I'll pass all this off to him and let him make the decision. We are definitely better off than we were.

Darrin
www.networxcomputer.net/elky.html
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Old 03-01-2009, 07:33 AM
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Delco Morrane, short hole, some times has a screw on cap.

Bendix, deep hole, snap wire cap...

The drum brake master is different then the disc/drum master. The all drum brake master will have check valves in both ports....
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Old 03-01-2009, 11:32 AM
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Did this car have power brakes before? If it did, then the rod is in the right hole on the brake pedal. If it had manual brakes, then the rod is in the wrong hole, that being the higher one with more leverage. So you may need to move that as well.

Brian
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Old 03-01-2009, 02:47 PM
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Also----manual brakes masters have a deep bore in the piston to hold the rod. The piston is the only thing holding the rod on the master side, so the shallow bore piston will not have enough holding the rod in the 'brake pedal relaxed' position.

On power brakes---the pushrod is usually part of the brake booster.

Might also be noted that you would want a smaller diameter piston vs a larger one.

A smaller diameter (15/16" to 1") will give you better leverage, but the pedal will travel a little bit farther.

1-1/8" bore for the power brakes so that the pedal is not so aggressive when applying the brakes----less pedal trave, but you have the assist of the booster
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