Brake Master Rebuild Service
05-11-2011, 03:24 AM
#1
Drifting
Thread Starter
Brake Master Rebuild Service
I need to get the brake master rebuilt, by all accounts DIY disassembly is problematic. Can anyone suggest a specialist I could try?
05-11-2011, 07:18 AM
#2
Vegas, Baby!
Rennlist Member
Rennlist Member
NAPA has rebuilt M/C, around 179.00, for the S4. I don't know the price for earlier ones. Pull yours first so you don't pay a core charge.
05-11-2011, 07:32 AM
#3
Drifting
Thread Starter
Thanks - The RHD is different to the LHD version, so I would need to be sure they actually rebuild mine rather than swap. I have a spare to rebuild, so it's ready to go, and there's no rush.
05-11-2011, 11:32 AM
#4
Team Owner
the MC are really difficult to take apart as evidenced by there being no removable snap ring ,
if you have an old MC chances are very good it is not going to be good as corrosion will have filled the unswept area and this will render the core NFG,
I would suggest to bite the bullet install a new part,
it is one performance item that you dont need to take chances with,
I would use ATE super blue fluid when you install the new MC
if you have an old MC chances are very good it is not going to be good as corrosion will have filled the unswept area and this will render the core NFG,
I would suggest to bite the bullet install a new part,
it is one performance item that you dont need to take chances with,
I would use ATE super blue fluid when you install the new MC
05-11-2011, 11:45 AM
#5
Drifting
Thread Starter
The price for a new RHD part is approx $700, therefore new is not a viable option.
Because of the track days and brake system changes I've made over the last couple of years the fluid has been changed every three or four months, usually with ATE Racing.
Because of the track days and brake system changes I've made over the last couple of years the fluid has been changed every three or four months, usually with ATE Racing.
05-11-2011, 04:10 PM
#6
Team Owner
it sounds like your familiar with a tool box.
IF so then I would first put a piece of tubing over the protruding portion of the piston so you dont nick it,
then get a dremel and make a wider cut in the area that holds the snap ring,
once this is done try to pry out the ring keep the tubing on the piston so you dont nick it if you do its toast and will leak.
once you have the ring out pull out the guts and remove the 10mm bolt on the bottom to release the inner piston, clean the housing then inspect the bore if you see rust or pits the bore is probably toast a lite hone might clean it up but it most likely will leak, see if you can source a new set of seals from a rebuilder or look for a rebuild kit
IF so then I would first put a piece of tubing over the protruding portion of the piston so you dont nick it,
then get a dremel and make a wider cut in the area that holds the snap ring,
once this is done try to pry out the ring keep the tubing on the piston so you dont nick it if you do its toast and will leak.
once you have the ring out pull out the guts and remove the 10mm bolt on the bottom to release the inner piston, clean the housing then inspect the bore if you see rust or pits the bore is probably toast a lite hone might clean it up but it most likely will leak, see if you can source a new set of seals from a rebuilder or look for a rebuild kit
05-11-2011, 07:15 PM
#7
You might be able to find a local shop that specializes in auto restoration that could rework, or refer you to a place that could rework, your old master cylinder by boring and placing a sleeve in it if the bore is pitted.
FYI. here is one place in the US (no experience or affiliation...):
http://www.whitepost.com/brake.html
HTH,
Bob
FYI. here is one place in the US (no experience or affiliation...):
http://www.whitepost.com/brake.html
HTH,
Bob
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05-12-2011, 02:57 AM
#8
Three Wheelin'
White Post does a very nice job of sleeving. The
finish is excellent. Worth contacting them to
see if they would do a complete rebuild or just
sleeve it & you get an internal kit & re assemble it.
Very quick turn around on sleeving.
finish is excellent. Worth contacting them to
see if they would do a complete rebuild or just
sleeve it & you get an internal kit & re assemble it.
Very quick turn around on sleeving.
05-12-2011, 06:38 AM
#9
Addict
Rennlist Member
Rennlist Member
it sounds like your familiar with a tool box.
IF so then I would first put a piece of tubing over the protruding portion of the piston so you dont nick it,
then get a dremel and make a wider cut in the area that holds the snap ring,
once this is done try to pry out the ring keep the tubing on the piston so you dont nick it if you do its toast and will leak.
once you have the ring out pull out the guts and remove the 10mm bolt on the bottom to release the inner piston, clean the housing then inspect the bore if you see rust or pits the bore is probably toast a lite hone might clean it up but it most likely will leak, see if you can source a new set of seals from a rebuilder or look for a rebuild kit
IF so then I would first put a piece of tubing over the protruding portion of the piston so you dont nick it,
then get a dremel and make a wider cut in the area that holds the snap ring,
once this is done try to pry out the ring keep the tubing on the piston so you dont nick it if you do its toast and will leak.
once you have the ring out pull out the guts and remove the 10mm bolt on the bottom to release the inner piston, clean the housing then inspect the bore if you see rust or pits the bore is probably toast a lite hone might clean it up but it most likely will leak, see if you can source a new set of seals from a rebuilder or look for a rebuild kit
The RHD (927 part number) MC has a small pin securing the inner piston that sits under the disc with a slot in it that is at the aft end of the front inlet port.
05-12-2011, 06:46 AM
#10
Addict
Rennlist Member
Rennlist Member
You might be able to find a local shop that specializes in auto restoration that could rework, or refer you to a place that could rework, your old master cylinder by boring and placing a sleeve in it if the bore is pitted.
FYI. here is one place in the US (no experience or affiliation...):
http://www.whitepost.com/brake.html
HTH,
Bob
FYI. here is one place in the US (no experience or affiliation...):
http://www.whitepost.com/brake.html
HTH,
Bob
There are places in the UK that will bore and sleeve brake cylinders -they normally use SS sleeves as well so no more corrosion problems. The main issue is wether they have the correct size piston seals.
I tried buying seals here in Oz but the only source I could find would only sell in quantities of 100 seals and if IIRC there are 2 of 1 types of seal and 3 of another. I wasn't prepared to invest nearly $1000 AUD on the offchance they would all work.
At the time I did my research I had put the GT MC back together as I needed to be able to drive it. If you could get some accurate dimensions of the seal grooves in the piston and pics of the seals installed I might revisit my decision to invest in MC seals.
