...and don't forget the slave cylinder -- better give it a look as well.
Lawrie Alexander had this to say:
>It sounds as though the clutch hose may be collapsed internally. Try
>replacing it and then bleeding the system, as Larry Hoy suggested.
>British Sportscar Center
>From: Brian DeFord <email@example.com>
>To: firstname.lastname@example.org <email@example.com>
>Date: Saturday, September 18, 1999 6:40 PM
>>I am brand new to the MG world. I just bought a 1974 1/2 MGB. It is a
>>little rough but seemed mechanically sound on the test drive and the drive
>>home. However, the first time we went to drive it somewhere, the clutch
>>was malfunctioning. I am 99% sure it is a problem with the hydraulic
>>system. If I sit for a few minutes, I can use the clutch a couple of times
>>before it stops working. When it is not working, it moves much more
>>freely, than when it is working. I checked the records the previous owner
>>gave me and he changed the clutch master cylinder at least twice.
>>How can I verify that it is the hydraulic system?
>>How can I determine which parts are failing?
>>Is there any other light you can shed on this?
>>Brian DeFord, Open Networks, Inc.
>>"Beloved, let us love one another: for love is of God; and every one that
>>loves is born of God, and knows God. He that loveth not knoweth not God;
>>for God is love." - the Apostle John (1 John 4:7-8)
>>"Greater love has no man than this: that he lay down his life for his
>>friends." - Jesus (John 15:13)
>>1958 Cadillac Sedan Deville (365 V8)
>>1993 Dodge Intrepid ES (3.5L V6)
>>1974 1/2 MG MGB
>>1990 Dodge Grand Caravan LE (3.3L V6)
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.