Time to change my leaky brake master cylinder.
Got this one from a friend of mine, He likes to keep his parts fresh
It's off an R32 GTST Skyline so it's slightly different internally. Externally? exactly the same.
The difference is the bore is 15/16ths for the R32, 1" for the R31.
It should work well with the brakes I have put on.
The twin pot brakes have a smaller volume than the standard single piston ones.
I will now have better brakes with better feel.
First up, gotta get all the paraphenalia out of the way
Master cylinder brace..
Boost sensor, related brackets, etc etc...
Trap for young players.
These are bastards to undo.
Best to invest in one of these...
Flare nut spanner.
If you use a standard 10mm open ender on these, chances are you will round it off 95 times out of 100.
The reason is that the nut is quite thin, and if it has been there a while it won't want to undo.
So what will happen is the nut will deform, then you start swearing, go out and buy a flare nut spanner and that won't fit because the nut is bent out of shape and rounded off.
Then it'll be time to get some more serious tools...
And then some even more serious tools...
then call some professionals...
Or invest in a flare nut spanner for about $10.
Here it is again
Trust me, buy one.
So, once you have those little bastards undone, undo the 2 nuts the hold the cylinder to the brake booster
and off she comes
Looks like she was leaking from the front.
Fitting the new cylinder is pretty much the reverse of the above.
Just nip the flare nuts up, the flared seat provides the seal.
Don't do em up too tight or you will be back in the shitter next time.
And here's a trick, get the flare nuts started before you bolt up the cylinder to the booster.
As for bleeding the brakes, do the fronts then start at the back and do them all again.
Okee dokee, How to bleed your brakes (and save the world) single handed.
First up you'll need to make a tube and bottle setup.
Heres one I prepared earlier
It's quite a smple thing, you just get any old bottle, I've used an old brake fluid bottle, but you can use anything with a plastic lid you can put hole in.
I like to use clear tube, window washer stuff so you can see any bubbles in the line, with a small piece of rubber tube over the end that will stretch over your bleed nipple.
The idea is to have the tube extend inside the bottle all the way to the bottom...
Then you put a small amount of fluid in the bottle so that the open end of the tube is submersed.
This is to prevent any air being sucked back up the tube and into the brake system
The whole setup should cost no more than about $5.
Or you can sport out around $15 (Aus)for a super professional bleeder.
Same clear tube setup with a little one way valve on the end
Aaaanyway, start with the wheel furthest from the master cylinder.
That means; if your car has a steering wheel on this side...
...you start with this wheel...
...and progress to the next nearest, which would be this one...
...then this one...
...and lastly, this one.
But....if your steering wheel is on this side...
...you do this one first....
...then this one next...
Got it? furthest to nearest.
Okay, first top up your master cylinder
Then starting as explained above, at the furthest corner, put a ring spanner over the hose, in this case a 10mm, and plug the rubber hose over the nipple thus
Crack the nipple, and use a ring spanner guys, it'll save a lot of heartache
Go to the brake pedal and give it 4-5 pumps almost to the floor.
Use a smooth even pump, not fast!
Jumping on the pedal too quickly can stuff the internal seals, especially if it has been sitting around for a while.
It helps here if you are using a different coloured brake fliud.
They come in a range of designer colours, blue, green, yellow, gold....
That way you can see the fresh fluid coming through.
When you are finished pumping the new fluid through, check the line for bubbles.
If it's bubble free, nip up the bleeder nipple, and top up the master cylinder.
This is important!
Make sure you don't let the master cylinder run out of fluid.
If it does you'll need to start again from the beginning.
Then proceed to the next nearest wheel and repeat, until all brakes are bled and you have saved the world.