Clutch Pedal gets tighter when the car warms up

[robplus4]

Does anyone know way the pedal gets tighter when the car warms up?
I replaced the master & the slave cylinder.
I adjusted the pedal, so it would have some play at the top of the pedal.(about 1/8" of play).
When it warms up, the play goes away.
Is it normal to have all the clutch at the top 1/3 of the pedal.

The car only has 13,000 miles on it.

Thanks for any ideas.

[82DMC12]

I think that's about right. My clutch goes back and forth in only the top half, maybe top 1/3 of pedal travel. And I have a new-ish master and slave, stainless clutch line, Centerforce clutch about 8 years/15K miles ago.

Andy

[jbreeden]

You may want to rebleed your clutch. Hydraulic fluid is meant to not expand or contract with heat, but if air is in the system, the air will expand as it heats up, changing the response of your pedal.