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Master cylinder U-Bolt

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Old Aug 15, 2004 | 04:41 AM
  #1  
mike96lt1's Avatar
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From: Okinawa Japan
Master cylinder U-Bolt

Is there any reason why it is a u-bolt, could I just use 2 bolts and 2 nuts and install it that way? The reason I ask is I am installing the master cylinder in my car(t56 swap) and I do not have the u-bolt, I bought a new master cylinder set up from parts direct, I have already bolted it up with 2 bolts and 2 nuts should this be a problem, I can't test it yet because I am waiting on my transmission crossmember so I can install the tranny.
Thanks
Mike
Old Aug 15, 2004 | 11:33 PM
  #2  
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Re: Master cylinder U-Bolt

Anybody?
Old Aug 16, 2004 | 12:04 AM
  #3  
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Re: Master cylinder U-Bolt

I dont know why you couldnt. If you get a street twin the master cylinder is threaded and you just use 2 bolts through the fire wall and into the master cylinder.

Maybe the flange on the stock one isnt strong enough so you need the u-bolt to wrap the unit to support it??

I do know that it took forever to get the u-bolt out on mine.
Old Aug 16, 2004 | 09:37 AM
  #4  
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Re: Master cylinder U-Bolt

Thanks for the reply. Welp I guess we will see if that is case as soon as I get my car on the road if it breaks than it will be a good excuese to get an adjustable one.
Old Aug 17, 2004 | 09:50 PM
  #5  
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Re: Master cylinder U-Bolt

I think it is just because the place is kinda hard to get to if your brake booster is still installed.
Old Aug 18, 2004 | 04:12 AM
  #6  
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Re: Master cylinder U-Bolt

The u-bolt doesn't hug the master so it lends no extra suppport other than hooking the 2 bolts together. I too think that the main idea was for assembly line ease of assembly.
Old Aug 18, 2004 | 07:21 AM
  #7  
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Re: Master cylinder U-Bolt

Sounds good I was just worried because every T-56 swap article I have read says you must have the u-bolt for required parts.
Thanks for the info guys
Mike
Old Aug 19, 2004 | 09:35 PM
  #8  
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Re: Master cylinder U-Bolt

Not so fast, Mikey!!
The master cylinder is mounted at an angle inside the firewall. When pressure is applied to the pedal, that linear force is transferred to the cylinder piston and the outside (or right side) part of the housing. This puts alot of stress on the outer bolt. If you're a lead foot like me, then that bolt will eventually loosen enought to misalign the cylinder piston, which then will force the entire assembly through the firewall...don't ask how I know this... The U-bolt design of the mounting bracket spreads the lateral load over the entire bracket, dissipating the force throughout the bracket and the firewall. Good to have.
Old Aug 20, 2004 | 04:48 AM
  #9  
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Re: Master cylinder U-Bolt

Alright won't ask how you know this and I don't wanna find out first hand only problem is here in japan it is hard to find parts for my car, can it be any kind of u-bolt that fits or does it have to be a specfic size from end to end, as I am doing the t-56 swap and have never seen what the factory u-bolt looks like. I also noticied in another post that you have an adjustable master on yours did you need to use the u-bolt with that set-up? Also do they make a compleat adjustable set-up for the LT1 or do you have to use the slave from the old set up and splice it onto the adjustable?
Thanks
Mike

Last edited by mike96lt1; Aug 20, 2004 at 04:59 AM.
Old Aug 20, 2004 | 11:30 PM
  #10  
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From: fort bliss, tx
Re: Master cylinder U-Bolt

It's not reallyl a U-bolt shape, more like half a rectangle... If you get a U-bolt that fits the distance between the mounting holes, then it'll be too long, longer than the master. I'll see if I can find the dimensions for you. Looking at the master tho, find something in a square shape that will span the mounting holes and has about 1 1/4" of thread. Use locking nuts on the threads too. You military? If so, go raid your motor pool's parts bin...I used to.
If you don't want to go this route, then any short, stout bolts will do, just don't try to put your foot through the firewall.
Old Aug 20, 2004 | 11:31 PM
  #11  
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Re: Master cylinder U-Bolt

Oh, and yes, I re-used the U-bolt on my Mcleod adjustable.
Old Aug 21, 2004 | 08:18 AM
  #12  
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Re: Master cylinder U-Bolt

Originally Posted by mike96lt1
can it be any kind of u-bolt that fits or does it have to be a specfic size from end to end, as I am doing the t-56 swap and have never seen what the factory u-bolt looks like.
Thanks
Mike
THIS should answer your questions. Hope it helps.
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