5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
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A new master cylinder kit should come with a cheapo bench bleeding kit. It should consist of 2 rubber lines and 2 plastic bungs that screw into the master.
Basically you just put the master in a vice(as straight as you can get it), hook up your two lines, fill with fluid, and use some sort of rod(wooden dowel, anything like this) and pump the master.
You'll want to pinch the lines shut as you push the rod in, let the rod come out normally, un-pinch the lines(to let the fluid drain a bit, and repeat.
You're looking for bubbles that float to the surface of the fluid inside the reservoir. After the bubbles stop(or barely come anymore), stop. Fill to the Full line and remove the lines, quickly inserting the caps that you were provided. If at any time the master runs out of fluid, you'll need to redo the whole bleed.
Now just install master into the car, again, being as quick as you can with the line installs, so the master doesn't run dry.
I clamp it in a vise lightly and fill cylinder resevoir up then push with a screwdriver the plunger from the back and on the return stroke I cover the holes with my fingers as to not draw in air, just did one on friday, works like a charm, i Keep pushing the plunger in until it freely squirts out fluid, you can loop the kit lines into the resevoir to make it easier if the MC came with a bleed kit
Originally Posted by dudegirl
Be polite and cordial when you talk to them, as pissing off the guys that can help you is seldom a good idea.
I don't bench bleed the MC. If I do, I make a big mess trying to get it installed without spilling the fluid.
Install the MC and other new parts, and make all the new lines you need to make. When you install the new lines into the MC, don't tighten them much, just snug them up.
Then remove the lines from the MC, and install the MC kit. I just make loops out of brake line, rather than use the cheap kit that sometimes comes with the new MC. The fittings need to be pretty snug, so they don't suck air.
Now bleed the MC until no air bubbles are seen. One at a time, remove the loops from the MC, and install the proper fittings. Since they've been fit before, they should go right in. You'll lose a little fluid, but not much. So have some paper towels ready to absorb it.
Then you just bleed the system like you normally would.
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