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Thread: Brake master and caliper id

  1. #1
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    Brake master and caliper id

    57 caliper2.jpg57caliper.jpg57 caliper2.jpg

    I am trying to identify the calipers that I have on my front disks. One of the bleeders broke off and I need to get a new one. I also think I need a new master cylinder. It is for disk front and drum rear. 57 master.jpg
    I hope I have attached a picture of the booster as well. We will see if the pictures attach.

    Thank you

  2. #2
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    I "think" what you have is a metric caliper (D154), but it's easy for me to make a mistake in id'ing that from many photos. It would have a 2-3/8" bore. To verify measure the distance between the anchor bolts, should measure 5.5". If it measures 7" between the anchors, it's a Chevelle style D52 caliper with 2-15/16" bore.

    Most power disc brake setups use a 1-1/8" bore master cylinder. That seems to be what you have.

  3. #3
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    What is the bolt spacing on calipers guessing metric stuff from a S10 or G body.
    Last edited by markm; 02-22-2022 at 04:23 PM.

  4. #4
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    68 Corvette master

  5. #5
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    So do I ask for or look up a D154 or D52? Do I need to know the year and make of vehicle it came from?

  6. #6
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    I looked at some Master cylinders for 68 corvette. They looked to be for 4 wheel disk. I have drum on the rear. Any suggestions on the master I need to use?

  7. #7
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    I use a 68 Vette master on my 55 with rear drums, and a 68 Camaro on my 56 same setup disk/drum.

  8. #8
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    Looks to me like that master cylinder has a large front reservoir/small rear reservoir. Big/little is not Corvette style, it's Chevelle style.

    Get the caliper anchor spacing posted up and then we can discuss what car to ask for.

  9. #9
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    It is the 5.5 metric D154. I am thinking of getting the brackets to go with the Chevelle D52 caliper. If I am correct the larger piston will give me more braking power and the pad area will be larger.

  10. #10
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    Will the caliper brake line bolt work on the chevelle calipers if I swap them?

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