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New master cylinder, should I get 1/2 , 3/4 or 1 ton? ---Please help!!!----

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by dawson444, Oct 8, 2002.

  1. dawson444

    dawson444 1/2 ton status

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    I need to replace my master cylinder, is it better to get one just for another 88 K5 or should I get one for a 3/4 or 1 ton truck? I am keeping stock booster right now. I am also running all 1 ton gear and discs in the back. I am open to ideas. Thanks!
     
  2. outlaw612

    outlaw612 1/2 ton status

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    Re: New master cylinder, should I get 1/2 , 3/4 or 1 ton?

    Im running a 1 ton on mine. I think it made a big difference, especially with the rear disc.
     
  3. dawson444

    dawson444 1/2 ton status

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    Re: New master cylinder, should I get 1/2 , 3/4 or 1 ton?

    Go to parts place and get a MC for an 84 K30 and it will bolt up to my 88 w/ 1/2 ton booster?
     
  4. outlaw612

    outlaw612 1/2 ton status

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    Re: New master cylinder, should I get 1/2 , 3/4 or 1 ton?

    It worked on my 82 k5 and 86 k10. Both had stock boosters.
     
  5. woody9

    woody9 1/2 ton status

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    Re: New master cylinder, should I get 1/2 , 3/4 or 1 ton?

    Wonder if that'd work on a 91-1500 Sub as well? (14FF/Disc) /forums/images/graemlins/confused.gif
     
  6. m j

    m j 1/2 ton status

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    Re: New master cylinder, should I get 1/2 , 3/4 or 1 ton?

    if you do it can you measure the bore and post the size.
    as the 1/2 and 3/4 use nearly identical calipers is there a difference in the master?
     
  7. dawson444

    dawson444 1/2 ton status

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    Re: New master cylinder, should I get 1/2 , 3/4 or 1 ton?

    I have been looking at all the parts places. The 1 ton ones and the 1/2 ton one seem to be different. I'm just gona get a 1/2 ton one and be done with it unless anyone has any input. Anyone?
     
  8. Sandman

    Sandman 3/4 ton status Author

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    Re: New master cylinder, should I get 1/2 , 3/4 or 1 ton?

    I found some Master cylinder sizes for you mj. These came off of the AC delco page for replacement parts. According to them, a 1982 Blazer with a 350 and PB has a master cylinder with a bore size of 1 1/8". Same year K30 truck with a 454 has a master cylinder with a bore of 1 5/16". No hands on data here though..
     
  9. TorkDSR

    TorkDSR 1/2 ton status

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    the problem is going to be the core charge i just called work and an 85 1 ton m/c is 30...and a $30 dollar core....a booster for an 85 1ton is 120 with a 60 dollar core....a booster for an 80 1ton is 35 and a 20 dollar core

    just info
    Ryan
     
  10. m j

    m j 1/2 ton status

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    didnt most 1tons come with hydroboost?
     
  11. m j

    m j 1/2 ton status

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    Re: New master cylinder, should I get 1/2 , 3/4 or 1 ton?

    ty
     
  12. BigMac

    BigMac 1/2 ton status

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    where oh where did you get those prices? Im looking to upgrade my master cylinder and possibly booster this weekend...

    edited due to the inability to form a complete thought in one sitting
     
  13. Sandman

    Sandman 3/4 ton status Author

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    Mine bolted right in. Didnt need new lines.
     
  14. dyeager535

    dyeager535 1 ton status Premium Member

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    Friends '83 350 C30 has hydroboost. On the Blazer brochure page there is also a 1982 Suburban dealer brochure, and it will likely mention system, but the pages don't appear to be accessible right now.

    The 1991 dealer brochure also shows the braking system, and I saw hydroboost listed, but not sure on what applications. Perhaps 454 or one ton only.
     

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