fozt · Mar 13, 2016

Hi,

One of my rear calipers is leaking fluid, so i'm going to change it next weekend.

I have braided extended hoses, is there any way i can clamp these or stop them spewing my existing fluid everywhere?

If i just change 1 caliper do i need to bleed all of the brakes (assuming i can't clamp the hose)?

Also, how much brake fluid should i have just in case?

Thanks!
Foz

wammers · Mar 13, 2016

fozt said:
Hi,

One of my rear calipers is leaking fluid, so i'm going to change it next weekend.

I have braided extended hoses, is there any way i can clamp these or stop them spewing my existing fluid everywhere?

If i just change 1 caliper do i need to bleed all of the brakes (assuming i can't clamp the hose)?

Also, how much brake fluid should i have just in case?

Thanks!
Foz

Just clamp as normal may deform the braid a little but you should be able to re form it. Or you could fill the new caliper and so long as you disconnect from old and connect to new fairly quickly you won't lose much fluid, then just bleed that corner.

fozt · Mar 13, 2016

wammers said:
Just clamp as normal may deform the braid a little but you should be able to re form it. Or you could fill the new caliper and so long as you disconnect from old and connect to new fairly quickly you won't lose much fluid, then just bleed that corner.

Great thank you.

Can I just fill the new caliper by removing the bleed nipple and filling from there?

Thanks

wammers · Mar 13, 2016

fozt said:
Great thank you.

Can I just fill the new caliper by removing the bleed nipple and filling from there?

Thanks

Yep either fill via inlet with bleeder open or through open bleeder other way. Just gives you a start you may need some rags about to soak up spillage as you play with it.

discool · Mar 13, 2016

As 'in detail' stated above, so nothing to add other it takes longer thinking about it than doing it.

Gazbo · Mar 14, 2016

fozt said:
One of my rear calipers is leaking fluid

Are not rear calipers on a D1 hard piped, are you referring to the flex hose that "tees" across the diff into both rear calipers?
Probably better to do as said above than to "crimp" off the flex hose, a 1/4" id blanking cap is useful to blank the flared end of the pipe after the flare nut in the caliper is undone and caliper removed, this will hold the fluid in the system and save a big mess, make sure the brake fluid reservoir is full to the max before undoing the line, have the bleeder open on your replacement caliper and as you reconnect the line, whilst you are tightening things up the air will bleed out of that replacement caliper, so by the time it is all bolted and piped up you should have all the air out with no extra bleeding required and minimal mess.

DiscoPol · Mar 14, 2016

I just use the finger of a rubber glove as a temporary bit of protection over the end of the brake line and secure it with a rubber band to hold the fluid in whilst I get things changed over. As said prefilled calipers make life a lot easier.

Harrymattson · Mar 14, 2016

It is a really really bad idea to crimp stainless braided Teflon brake pipes like Aeroquip or Goodgidge - you will irrevocabley damage them.

DiscoPol · Mar 14, 2016

Harrymattson said:
It is a really really bad idea to crimp stainless braided Teflon brake pipes like Aeroquip or Goodgidge - you will irrevocabley damage them.

I agree with this. +1

fozt · Mar 14, 2016

Thanks for the replies.

I'll avoid crimping the braided hose then, and i'll buy a 1/4" blanking cap - and then i should be all sorted. I've got a few litres of brake fluid turning up too.

Cheers.

fanatic · Mar 14, 2016

Making things hard as ever, just wedge brake pedal fully to floor on most things and it won't drain brake fluid

Gazbo · Mar 15, 2016

fanatic said:
just wedge brake pedal fully to floor on most things and it won't drain brake fluid

Portions of the open ended line lower than the master cylinder can drain all the way from the master cylinder I think you'll find, fluid out air in, back to square one.

fanatic · Mar 15, 2016

Gazbo said:
Portions of the open ended line lower than the master cylinder can drain all the way from the master cylinder I think you'll find, fluid out air in, back to square one.

The suggestion is the master cylinder won't drain,

Gazbo · Mar 16, 2016

fanatic said:
The suggestion is the master cylinder won't drain,

Yes agree with that, but by applying the cap to the end of the open line nothing drains so no or minimal air enters the system then the only air you end up with is a small amount, which bleeds out of the caliper bleed nipple under master cylinder reservoir head pressure, (reservoir needs to be completely full), as the flare nut is tightened, it is a simple, easy and effective method.
Many master cylinders on older vehicles fail after a caliper/cylinder job because the normal bleeding process, (pumping the pedal), pushes the cylinder piston/rubbers into areas of the cylinder bore that is sometimes rusted/pitted and is outside the normal area of it's operation, taking steps to avoid the normal bleeding process avoids this common problem, I had to learn the hard way lots of years and brake jobs ago.

fanatic · Mar 16, 2016

Gazbo said:
Yes agree with that, but by applying the cap to the end of the open line nothing drains so no or minimal air enters the system then the only air you end up with is a small amount, which bleeds out of the caliper bleed nipple under master cylinder reservoir head pressure, (reservoir needs to be completely full), as the flare nut is tightened, it is a simple, easy and effective method.
Many master cylinders on older vehicles fail after a caliper/cylinder job because the normal bleeding process, (pumping the pedal), pushes the cylinder piston/rubbers into areas of the cylinder bore that is sometimes rusted/pitted and is outside the normal area of it's operation, taking steps to avoid the normal bleeding process avoids this common problem, I had to learn the hard way lots of years and brake jobs ago.

Your teaching me to suck eggs

Gazbo · Mar 17, 2016

fanatic said:
Your teaching me to suck eggs

Nope, I don't doubt you already know all about it, it's only for the OP's benefit, all saves him making well tried mistakes.

fozt

Active Member

wammers

No longer with us, RIP

fozt

Active Member

wammers

No longer with us, RIP

discool

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Gazbo

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DiscoPol

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Harrymattson

Member

DiscoPol

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fozt

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fanatic

RESPECT IS EARNED, BEATINGS ARE FREE ;-)

Gazbo

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fanatic

RESPECT IS EARNED, BEATINGS ARE FREE ;-)

Gazbo

Well-Known Member

fanatic

RESPECT IS EARNED, BEATINGS ARE FREE ;-)

Gazbo

Well-Known Member

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