On Thu, 20 Nov 2003 12:33:25 +1100, "melbourne" <jjjjjj@hotmail.com>
wrote:

>Unfortunately, the pedal sinks slowly until it almost hits the firewall.
>However, as today is a cool day, the brake pedal is not sinking and the
>brakes are working fine. The problem only occurs on a hot day. Bizarre!!

This is very typical of ~1994+ Honda master cylinder failures. They
aren't like earlier models or other cars I have had. Those tend to
suddenly break and you know you have a problem. Newer Hondas will be
fine most of the time but occasionally in warm weather the pedal will
sink. It would probably continue like this for a long time but don't
wait to fix it.

>
>
>"Dmitry" <grinvald@hotmail.com> wrote in message
>news:e6d180a.0311190616.77dfc61@posting.google.co m...
>> "melbourne" <jjjjjj@hotmail.com> wrote in message
>news:<I2Eub.110$rG.3515@nnrp1.ozemail.com.au>.. .
>> > Vehicle: 1994 Civic with no ABS
>> >
>> > Problem: I am having a weird problem with my brakes. A few days ago,
>on a
>> > stinking hot day, I was at a set of traffic lights, when suddenly, my
>brake
>> > pedal began to slowly sink to the floor. The brakes worked fine and
>would
>> > stop the car, even under severe braking. The only problem would be that
>the
>> > brakes, when depressed would begin to sink to the floor after a few
>seconds.
>> >
>> > They were fine in the morning and fine in the evening. The only
>difference
>> > was that when I drove the car during the day, the weather was over 35
>> > degrees C. This problem occurred twice and each time it occurred, it
>was on
>> > a hot day. As the day became cooler or when the car is driven on a day
>> > below 35 degrees C, the brakes behave normally?
>> >
>> > Any ideas?
>>
>>
>> If the pedal sinks just a little (about an inch) I would not worry
>> about this - many cars do that to some degree. With the engine NOT
>> running, pump the brake pedal until you almost cannot push it down,
>> then with your foot firmly on the pedal start the engine - you will
>> feel it sinks a little bit. If it's sort of the same you had
>> experienced - forget about it.
>