Changing brake fluid
Discussion
I know nothing about t'Cayman.
EFClarity (again)
anonymous said:
[redacted]
Find/buy a long clear tube that fits over the first part of the bleed nipple. Anything will do. It does not need to be air-tight, but the snugger the better. Run this into a jam jar/beer bottle. As you open the nipple, you hold the tube - watch the fluid carefully as it flows through the tube - depending on what fluid you have chosen of course, you should see a colour change, unless it is exactly the same fluid AND it was done recently. So on mine I use RBF 600 or 660 (I can't remember) and the new fluid is paler. Also look closely for any bits or bubbles. Keep going until you see no more.EFClarity (again)
Edited by Orangecurry on Thursday 22 April 10:23
anonymous said:
[redacted]
Orangecurry's description doesn't prevent you using a pressure bleeder, you can still bleed the fluid into a jam jar. I work on the basis of an eighth of a jam jar per bleed nipple. So by the time you've bled every one you'll have a full jam jar and full system bleed.Nb. When using a pressure bleeder you'll need to put a clamp on the overflow pipe on the reservoir (if you have one) otherwise you'll have it shooting out if it and on to your garage floor!
boxsey said:
Orangecurry's description doesn't prevent you using a pressure bleeder, you can still bleed the fluid into a jam jar
yes... sorry if I wasn't clear. Doesn't matter how to get the fluid out, but the jam is critical.Eat the jam first. Unless it's that jam from Auntie Vera that you can't stand.
ETA how many bleed nipples on the 981's calipers? Boxsey's and my cars have two per caliper.
Edited by Orangecurry on Thursday 22 April 13:55
...apologies if you know all this but:
make sure you have the exact size ring-spanner for the bleed nipple, and ideally a six-sided rather than twelve-sided one.
Put this on the nipple, then put on the tube. If it won't come loose, then you may need heat/penetrating fluid and patience - don't round off the nipple.
When you retighten the nipple DON'T overdo it. Stripped threads are not nice in a caliper. It's a really low torque setting, so it'll be less than you think, and feel less than the amount of force you needed to undo it
make sure you have the exact size ring-spanner for the bleed nipple, and ideally a six-sided rather than twelve-sided one.
Put this on the nipple, then put on the tube. If it won't come loose, then you may need heat/penetrating fluid and patience - don't round off the nipple.
When you retighten the nipple DON'T overdo it. Stripped threads are not nice in a caliper. It's a really low torque setting, so it'll be less than you think, and feel less than the amount of force you needed to undo it
Edited by Orangecurry on Thursday 22 April 13:54
Don't empty the Res all the way as this will increase the risk of an air bubble getting drawn into the system once you pressurise. Just put a litre through the system or a litre and a half if you want to be 100% sure. I probably look to get just over half a litre out the fronts as they are bigger callipers and hold more fluid. The Bundy pipes that go to the rear hold next to nothing.
Take heed of the calliper nipple warning and don't go all Incredible Hulk when tightening it back up !!!
Take heed of the calliper nipple warning and don't go all Incredible Hulk when tightening it back up !!!
Workshop Manual states 2 bar pressure. Instructs to bleed furthest outer bleed screw first - so LR caliper outer then inner; RR; LF then RF.
Manual states bleed 1/3rd litre from first outer bleed screw; this ensures the fluid is 'changed' in the reservoir and master before flushing the remaining lines.
Bleed screw torque 11-13Nm - because you were going to torque them weren't you?
Manual states bleed 1/3rd litre from first outer bleed screw; this ensures the fluid is 'changed' in the reservoir and master before flushing the remaining lines.
Bleed screw torque 11-13Nm - because you were going to torque them weren't you?
A completely different car but a good explanation with pictures. https://rennlist.com/forums/964-forum/672389-c4-br...
anonymous said:
[redacted]
We use a pressurised unit with a 20 litre drum; so no issue with low levels. Just keep an eye on the level in between calipers.
Any spills, flush away with water - don't use brake cleaner - it just moves it without diluting.
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