navegator wrote:
Old brake hoses some times swell internally, they look ok but are restricted inside, when the pedal is applied there will be pressure on the pedal as the fluid slowly pushes against the soft internal walls pushing and creating a dam of soft rubber at the lower end of the hose where it is not damaged, the pressure is lost slowly as it passed the restricted area, bleeding the brakes will be normal since there is no pressure to push the soft internal walls of the hose towards a hard point blocking the little bit of hose, after a few seconds the fluid starts getting past the restriction and the pressure is taken up by the piston on the caliper, since it did not move to begin.
The solution is to replace all the hoses and also check that the brake pedal and the booster push rod that goes into the master cylinder are at the correct length, the other possible problem area is the master cylinder if it is manufactured in China or India or some where else instead of the USA.
Some years ago I had an auto repair shop and I had to specify American made parts or German or Swedish or Japanese made because the Chinese or other manufactured parts were nothing but junk, when time equates to money earned those junk parts are a loosing proposition, master cylinders, remanufactured generators, some brake boosters and power steering pumps as well as power steering racks that are made in Asia are notorious for junk, cheap does not equate with quality, specially when it pertains to brakes, to many lives depend on them.
navegator
Thank you so much! I will pass info onto pops and then get back soon!
