I for one cannot believe the sauga that has gone on for a month . I mentioned somewhere in a post or PM about rebuilt master cylinders a
BIG NO .your buying a cylinder that has been cleaned and maybe honed inside
with new piston an rubber cups .The problem is that master cylinders and wheel cylinders corrode inside ,leaving pitting and damage .you cannot hone this out ,and further the surface of the bore in the cylinder is now rough
from the honing process ,yes it may feel smooth ,but little scratches now are in the steel (honing marks) and fluid can escape around the rubber cup seal .
A new master cylinder has a smooth almost polished machine surface .
This shop using a rebuilt master cylinder ( and multiple times I might add )
does not have a clue as to how to properly perform the work .The hydroboost
units can be defective ,but that has nothing to do with low pedal or spongy
pedal in any way .You bleed the brakes with the engine off ,NO hydro boost
is in play here .I perform automotive and truck repairs including RVs and those
P-30 front hoses and calipars that give alot of problems ,old hoses especially
do to rotting rubber to the inside causing the hose to restrict fluid movement
I use NEW quality master cylinders and wheel cylinders without exception in
my repair shop .Id never install a rebuilt master cylinder no matter what .
you have to go with quality parts everytime ,so the job will go right the first
time . Things can and do go wrong even then ,but using the best parts helps
ensure the jobs done right .I read many posts that encourage using the cheapest price part available with no thought to quality ,the cheapest price
does not mean the best quality .Those rebuilt master cylinders cost about
29 bucks more or maybe less at Autozone ,A quality new unit is higher priced
and far far better . A new master cylinder could have solved this fiasco alot
sooner ,had the shop not gone el cheapo on the part .bottom line with this
repair facility ,if they don't know how to install a master cylinder and bleed the brakes (bench bleed master cylinder first) install ,bleed all wheels ,
somthings really wrong there .If I allowed somthing of this type to go on for more than a few days or a week I wouldn't have any customers .
Scott of scottanlily