Question about Ford F-100

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Master cylinder f100

What kind of master cylinder do i need to ask for to make sure that i get the right one because ever parts store will show you a dif. one.

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Hi, The correct master cylinder may still be the one you have, you will have to have it checked by a brake specialist or reputable parts supplier, to make sure there is no line pressure valve in the front brake section of master cylinder.
On some of the more common early Master Cylinders it was just a matter of removing valve and discarding it.
Hope this is helpful.
Regards March

Posted on Aug 05, 2008


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1999 pontiac sunfire sedan

It usually is not necessary to relace e line all the way back to the master cylinder. There is usually someplace along the line that can be flared and a barrel connector used to add new line. If you really want to replace it al the way to the master than it would be a good idea to bring the fittings with you when you go to pick up the new parts. This way there will be no communication issue between you and the parts people and you can make sure you are getting the correct parts before you leave the store. Let me know if you have any questions and I'll do my best to answer them. Thank you for using!

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Can break master cylinder (kit) do as good job as a new master cylinder?

This is a Yes, and No reply.

if the mechanic insures that the bore of the brake master cylinder, is free of rust pits, and if not, uses a brake hone to smooth out the bore. Closer inspection will reveal if the pits are too deep, and the master cylinder is unusable.

if the rubber components that go into the bore of the brake master cylinder, are installed in the correct direction, all the components are assembled in the correct order, and are pre-lubed with a little bit of clean brake fluid, before installing.

if any of the above criteria is not met.

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As a metallic object, such as a brake master cylinder heats up, (Engine heat, or even just the sun shining on the vehicle), then cools down, the moisture that is always present in the air, will form in the master cylinder.

Forms in droplets, at the bottom of the master cylinder's reservoir. This moisture creates rust, when it touches the cast iron brake master cylinder casting.
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Makes rust pits in the bore, and harms other master cylinder components, then goes into the brake lines, and onto the rest of the brake system.

For the cost of a rebuilt or new brake master cylinder, compared to the expense of the master cylinder brake kit, and your labor time, I would go with a rebuilt, or new one.

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