Apex & GTiR Parts/Development
- Thread starter Kev@Apex
- Start date
Dooie Pop Pop
New Member
:shock: that aint right:shock:GTIR-LOZ said:
vss irvine
Well-Known Member
what about trying a reconditioned standard master cylinder first????GTIR-LOZ said:
before you try fitting something else?
P
pulsarboby
Guest
here you go this is from another thread by yourself that i replied to, just in case you aint seen it!GTIR-LOZ said:
ok, the master cylinder will make no difference whatsoever to the pedal dropping, unless the pressure seal inside the cylinder has split!
easy way to check that out is start the car, pump the brake pedal untill its hard (sounds perverted) and keep constant foot pressure on the pedal!
if the pedal slowly creeps down to the floor.....under pressure....then you will have a faulty master cylinder pressure seal!
if not then the cylinder is ok!
if when your driving the pedal suddenly drops on first pressing the pedal, then this is either caused by
a) a sticky or binding caliper (probably on the rear)
b)water moisture in brake fluid
c) air trapped either in the master cylinder or brake lines. this is the most common cause, and can be a right git sometimes to get out.
the easiest way to do this is by clamping the brake hose on one side and bleeding the other, then visa versa on all 4 wheels!
sometimes air gets trapped and is drawn from one side to the other without ever reaching the bleed nipple, so you have to encourage it along the way!
one other possibility is that at sometime somebody has fitted a caliper upside down...yes laugh....but ive seen it done:lol: with the bleed nipples at the bottom!
this will deffo cause major probs, as the air will never be able to escape as it will be trapped in the caliper.
so check that all bleed nipples are at the top.
P
pulsarboby
Guest
yeah ive seen it done a few times carl lol
people have spent days bleeding there brakes then run car into my garage after they have fitted new calipers, and say 'theres sopmething wrong with them':shock:
one look and i say put them on the right way round and they will work properly:lol: :lol:
people have spent days bleeding there brakes then run car into my garage after they have fitted new calipers, and say 'theres sopmething wrong with them':shock:
one look and i say put them on the right way round and they will work properly:lol: :lol:
GTIR-LOZ
New Member
well they are wilwoods so have 4 bleed nipples and i guess it does not matter which way round the calipers go as there is no markings to which way round they go i have bled and bled these brakes i did think it wasnt the cylinder as on a staright they are fine just round a chicane the first press drops to the floor i dont think its pads binding as i have just changed them and lubricated the pistons and none seem stuck it could be air in the pistons still i guess but i cant think of how to bleed them better and when they work they work very well
O
Odin
Guest
GTIR-LOZ said:
Use a power bleeder ;-) .
Rob
Bleed them with the engine running, get the person pressing the pedal to press it hard, then release the bleed nipple ;-) just make sure your bleed pipe is firmly secured as the fluid will come out at quite a rate:shock: ake sure you bleed all the brakes, not just the fronts.
GTIR-LOZ
New Member
def has 4 http://www.rallydesign.co.uk/catalog/product_info.php?cPath=562_588&products_id=8317
this is the caliper have ordered a cap for pressure bleeding hope it fits will post how i get on
this is the caliper have ordered a cap for pressure bleeding hope it fits will post how i get on
Development has progressed 
Sadsy has fitted the manifold and all is good.
The brake kit has arrived here for testing, "the chief" has first refusal on the first set as he supplied the hub.
Looks like our other brake kits, but with an engraved "K" on the caliper rather than our older design. No point opening it to take a picture, but heres a example, 330mm behind 18" Rota GTR's
356mm will also be available.
Sadsy has fitted the manifold and all is good.
The brake kit has arrived here for testing, "the chief" has first refusal on the first set as he supplied the hub.
Looks like our other brake kits, but with an engraved "K" on the caliper rather than our older design. No point opening it to take a picture, but heres a example, 330mm behind 18" Rota GTR's
356mm will also be available.