Replacing bleeder valves

[88SUB]

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This is more of a "WTF?"
I've been having issue with squishy brakes.replaced leaking master cylinder.went to bleed brakes as usual but they're not bleeding properly.
Rear driver no matter how much bleeding, still lots air. Rear passenger, straight fluid.
Rear are drum.
As for the front (disc) it's the opposite.
Driver straight fluid, passenger getting lots of air.
So I thought that maybe my bleeder valves were just old and corroded. Autozone sold me what size they should be and here's where things got weird. May e this is normal?
Front bleeder valves are 2 different sizes?!

 

[Goldie Driver]

Fronts are the same size normally- mis packaged would be my guess.

 

[Turbo4whl]

If you have too much travel on the rear brake shoes, it can be hard to get the brakes bled. Apply the parking brake to remove the extra shoe travel, then bleed the brakes.

 

[BKING33]

I always gravity bleed the brake system first. Them I bleed each line in order.

 

[88SUB]

Fronts are the same size normally- mis packaged would be my guess.

Well no it's a completely different size altogether You can see the different sizes that I've got there one size was for the front one size was for the rear and the front I put that larger one on on the driver's side which would mean that the passenger side would get the same size and it's not it almost fit the smaller one but it was like the thread was different.

 

[88SUB]

I always gravity bleed the brake system first. Them I bleed each line in order.

I pretty much did gravity bleed because I had the bleeders off and I went through a lot of fluid just letting it gravity bleed. There must be air getting somewhere but it's just too weird that it's opposite sides front and back that are doing it.

 

[Goldie Driver]

Well no it's a completely different size altogether You can see the different sizes that I've got there one size was for the front one size was for the rear and the front I put that larger one on on the driver's side which would mean that the passenger side would get the same size and it's not it almost fit the smaller one but it was like the thread was different.

Oh, well the fronts normally are larger - maybe someone put "what they had" on last time.

 

[88SUB]

Oh, well the fronts normally are larger - maybe someone put "what they had" on last time.

It's almost like the calipers are different. I mean if they have different size bleeder screws that's just weird, but yeah they could be two different brands or something, I don't know. Maybe I should just buy me some new calipers. They aren't that expensive.

 

[Bennyt]

Your calipers have probably been remanufactured at some point. If the bleeder threads are even slightly damaged, the rebuilder taps to an oversize. I've come across this multiple times on the more common calipers. Some of these calipers have been in circulation 45 years or so.