Bleeding Brakes, Trouble with one caliper Options

[Deusexmachina77]

I replaced the two front calipers with rebuilt calipers. The system was drained. I bleed the brakes starting in the rear and going to the front. I've run into an issue with the driver's side front caliper.

I have fluid making it to the caliper, as the bottom has fluid coming out with no air bubbles. But when I went to the top bleeder, I only got air. It never filled up with fluid. I removed the bleeder screw to make sure it wasn't clogged. We peddled the car continuously, and only just air. This went on for a while.(IMG:style_emoticons/default/headbang.gif)

There are no fluid leaks in the system.
Any thoughts would be welcome.

[technicalninja]

Sometimes the bleeder feed inside the caliper is closed shut with old rust and debris.

I would NOT expect this from a PMB caliper.

When I rebuild any caliper, I always run a drill bit through the bleeder cavity and its feed.

Sometimes you get a load of crap on your drill bit.

I choose a drill bit smaller than the diameter of what I am cleaning.

I'm not removing any metal from the caliper body.

Using the drill bit solely for the purpose of careful cleaning.

I have enough trouble with cheaply rebuilt calipers that I don't use them at all if I can purchase factory new.

I once got a Centric (decent brand usually) that had a piece of gum placed beneath the bleeder to make it seal into the completely rusted out seat.
It had been "rebuilt" in Mexico...
I'm guessing that they pay the workers by the number of calipers finished, the workers are NOT car people, and they DO NOT CARE!
That "hung" a Honda CRV on my lift for a day. As I use my lift to feed my family that's a big deal for me.

It is possible to bleed all of the air out of that caliper using the lower bleeder.
You just have to make the working bleeder into the upper one.
My dad had a 964 that had two left calipers on it...
The right side had to be removed from its mounting and the caliper was turned upside down. Push the pads back a bit and install a piece of wood between them.
Hold caliper in bleeder "up" position to complete the bleed.

I had to slightly loosen the hard-line connections and remove the U clip that held the hard line to rubber connection to the strut housing. This allowed just enough flex to invert the caliper.
Tighten up connection lightly in the upside down position, bleed, then slightly loosen again to re-install the caliper.

The "big red" Brembo calipers on this car had only 1 bleeder per caliper and the calipers themselves were extremely expensive which forced the work around I just described.

Worked fine but was a bit of a PIA to do.

Don't get brake fluid on you. It's hydroscopic and absorbed easily through your skin.
This is why brake fluid feels WARM when it's on you. It's seeping in...
Either the kidneys or the liver (can't remember which one) cannot process it and it stays there for the rest of your life.
It's cumulative and I'm a bit worried as I got this important information way too late...

[Deusexmachina77]

Don't get brake fluid on you. It's hydroscopic and absorbed easily through your skin.
This is why brake fluid feels WARM when it's on you. It's seeping in...
Either the kidneys or the liver (can't remember which one) cannot process it and it stays there for the rest of your life.
It's cumulative and I'm a bit worried as I got this important information way too late...
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@technicalninja I appreciate all your comments and suggestion but especially this last one.