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Thread: '70 Corona RT72 master cylinder swap info

  1. #1
    Forum Member 1st year Apprentice
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    Default '70 Corona RT72 master cylinder swap info

    Hello, it's been a while since I have posted. I just uncovered my corona, getting it ready for the summer here in northern california. The master cylinder has leaked in storage, and created a big mess. This master is so big and bulky/ugly. I am trying to modernize as I repair, and/or replace parts, and would like info on any direct swaps? I have looked around at some salvage yards, and done a google search. 1970 corona mark II, (RT72). Thank you.

  2. #2
    Basher Grease Monkey
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    Default Re: '70 Corona RT72 master cylinder swap info

    what is the bore size of the master cylinder.Does it use an alloy spacer between booster and master cylinder?
    Scott
    coronacoronacoronacorona

  3. #3
    Forum Member 1st year Apprentice
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    Default Re: '70 Corona RT72 master cylinder swap info

    Quote Originally Posted by sbfoot View Post
    what is the bore size of the master cylinder.Does it use an alloy spacer between booster and master cylinder?
    Scott
    It does, you can see the spacer at the bottom of the pic. I will pull it apart tomorrow, and take some pics and measurements. thank you for the quick reply.

  4. #4
    Basher Grease Monkey
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    Default Re: '70 Corona RT72 master cylinder swap info

    A few of us use a 7/8 master cylinder from a from a ford lazer ka might be some sort of mazda 323 (front wheel drive) 81-83. its a dual circuit unit,you might have to modify the pushrod between the booster and cylinder.
    Scott
    coronacoronacoronacorona

  5. #5
    Forum Member 1st year Apprentice
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    Default Re: '70 Corona RT72 master cylinder swap info

    Good tip on that mazda master. I would like to keep it toyota, if at all possible. I found a replacement at my local parts store. 38$us. The booster seems fine.
    It seems as though the hoses, swelled, and got soft, then burst over the winter. here is a pic of my master, and the alloy spacer. I have an additional slave unit, on the passenger side, that is also leaking. Parts for this car are proving difficult to find. Does this master look familiar to anyone?


  6. #6
    Basher Grease Monkey
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    Default Re: '70 Corona RT72 master cylinder swap info

    yeah,refering to my books it looks like the original master cylinder any pics of the rest of the car? its always good to see an old corona!
    Scott
    coronacoronacoronacorona

  7. #7
    Forum Member 1st year Apprentice
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    Default Re: '70 Corona RT72 master cylinder swap info

    Quote Originally Posted by sbfoot View Post
    yeah,refering to my books it looks like the original master cylinder any pics of the rest of the car? its always good to see an old corona!
    Scott

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