Re: WANTED: NOT-rebuildable BTV master cyl.

Posted by PackardV8 On 2009/5/18 21:23:13

Yes HH56. Your explanation is correct. BUT there is another issue.

IF the compensator port fails for ANY reason then ABSOLUTELY NO brakeing effect whatsoever will obtain. NOT even the slightest amount that would be equivelent to dragging ones foot outside of the door.

That is to say there is ABSOLUTELY NO warning that there is a problem.

With a Conventional CUP SEAL type master cylinder THER IS WARNING. IF the cups become weak or slightly worn then the pedal will begin to feel spongey or exhibit other UNusual symptoms. Also, PUMPING or slamming the pedal real hard with the conventional cup seal type master cylinder will produce some reasonable braking effect. THis is because FAST HEAVY SUDDEN pressure put on a worn cup will force the lips out to seal better. SUCH WARNING WITH SOME reasonable amount of braking effect would prompt a reasonable person to immediately take action to service the problem!!! That is to say that the driver would have a second chance to actualy STOP the car.

BUT NO SUCH WARNING WOULD BE EXHIBITED wit ha BTV type cylinder. WITH BTV it is AON!!! A conventional cup type cylinder offers the possibility a second chance.