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  #1  
Old 05-10-2010, 11:54 AM
benhogan's Avatar
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Join Date: Aug 2009
Location: Chapel Hill
Posts: 1,092
Brake Master Cylinder gotcha

This weekend I attempted to replace a leaky MC.

Basically, I cross threaded one fastening bolt and ruined the bolt and the new MC.

That's another $150 or so paid to the DIY tuition gods.

I already know what will fail next. With a new MC, the old calipers will start leaking. Old cars!

Still cheaper than one new car payment though so I'm not complaining too much.

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Last edited by benhogan; 05-10-2010 at 11:56 AM. Reason: enhanced
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  #2  
Old 05-11-2010, 02:59 AM
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Location: Long Beach,CA
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Well, I have yet to do it to a Master Cylinder itself, but did it to one of my Motor Mounts and have done it on other things over the years.
I believe at least twice I started to cross thread the Master Cylinder Line fittings but stopped before I ruined them completely.
(It seems like it happend when I was in a hurry and also because I did not try to get the threads started by hand first (if possible).)

The only thing that is worse is paying someone else a lot of money to strip them for you and not finding out until later.
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  #3  
Old 05-11-2010, 10:39 AM
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always start threads by hand; if you must use a wrench, hold it w/ 2 fingers so you can't put enough torque to damage anything. i'd rather spend 1/2 hour on one bolt than ruin it. in the long run it will save time to take your time.
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  #4  
Old 05-11-2010, 07:15 PM
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Location: Buffalo NY
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Best way to start a thread is to push lightly on the screw or nut and turn it backwards till you feel it drop on.
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  #5  
Old 05-11-2010, 10:26 PM
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Location: Mount Holly, NC
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Quote:
Originally Posted by moon161 View Post
Best way to start a thread is to push lightly on the screw or nut and turn it backwards till you feel it drop on.
YESS!!!
we have a winnah!

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