1990 Honda Accord Brake Problems


My 1990 Honda Accord has problems when it is hot. The brake pedal goes to the floor when the temperature goes over 85 degrees. The rest of the time the brakes are fine.

Any ideas?


[b]The problem might be with the brake master cylinder.

When the bore and the cup seal in the master cylinder become worn, and the master cylinder gets hot from the underhood temperatures, the bore can expand slightly. When this happens, the cup seal is no longer able to seal against the wall of the bore. This allows the brake fluid to bypass the cup seal. And that’s when the brake pedal goes to the floor.