funkyboogalooo

Hi all
I bled my clutch on the weekend with what I would say was pretty good results, however I have a concern. I bled it using an electric pressure bleeder exactly as per the manual so even though there may some varying thoughts as to whether this is the best way I thought if I go with the manal I cant go far wrong.
Now the weird one. At the bottom of the reservoir there appears to be a return pipe that I am guessing is an overflow. This was weeping. This wasn't a solid pipe but a braided hose.
So, is this a return pipe, if it weeps under pressure (when using the bleeder) is it likely to suck air in the system and cause me problems?
Cheers
Mike

robot808

Mike,
I am no expert, but I did wrestle with bleeding for weeks. It sounds like you are describing the "blue hose". I hope I am wrong because many people here have described it as a real PITA to change. If you have weeping, you will soon have bubbles. It would just be a recurring nightmare. Good luck with it.

nosnow

Sounds like the hose that feeds the clutch master. It is a Pain to replace.

Mako 928

It sounds like "the blue hose" also sounds like maybe there was to much pressure W/ the electric pressure bleeder that may have caused this to weep. I would wipe/clean the bottom of the reservoir and the blue hose and see if it is still weeping. Also if the condition of the hose is in question it may be time to replace it. I have replaced the blue hose W/ out removing the brake booster in MY 85' along W/ the clutch master cylinder which is on the other side of the "blue hose".
So to answer your question this is not a overflow hose it goes from the brake fluid reservoir to the clutch master cylinder, a rubber/metal hose goes from there to the clutch slave cylinder.

FUSE69

Yup, the 'infamous blue hose'

If it's weeping, I strongly suggest that you replace it... It doesn't see any pressure when in use (it just feeds the clutch master with fluid) but even so, it's possible that the pressure from electric bleeder has damaged the hose enough that it may continue to weep under no pressure...

BTW, what pressure does the bleeder you used supply? IIRC Around 12 PSI is considered 'safe' to use on an aging 928 system... but even this pressure can destroy what otherwise appears to be an intact 'blue hose'... (BTDT!)

I replaced mine with a feed hose from a SAAB 9-5... fit perfectly... and was free from the 'parts bin' at work

So mines now known as the 'black hose'...

AO

The stock "Blue Hose" does not have any kind of clamp on it at the resevoir - not sure baout down at the master. If you are going to use a pressure bleeder, make sure you put a clamp on it, or it can easily pop off. That happened to me... once.

funkyboogalooo

yep thats the hose. in fairness I dont think the bleeder did it as it looks really tired and freyed. Can you use any hose and clips for this or is it a special type of rubber?
Cheers
Mike

FUSE69

The hose must be resistant to brake fluid... so there are not a lot of choices... EPDM is probably the best material...think they aren't that expensive from Porsche. As for the clips... if you can find one like I have pictured, that is what OEMs generally use... you don't want to use a clamp that can supply to much clamping force, for risk of cracking the plastic reservoir nipple.


I 'found' some of those small clamps at work so thought it best to put one on, to prevent any 'pressure bleeding mishaps'

Mrmerlin

if you can get the correct blue hose you should not need any kind of clamp for the hose ends, The correct hose is a slip fit , and once its on then it wont come off unless its cut or otherwise damaged with some oil or other chemical.
To replace the hose at the clutch master you might save a lot of time by removing the master ( 2 bolts and rubber bellows, inside the car)and the hose attach points this will let you have ready access to the top of the master once you move it out of its position

Fogey1

Thanks. Got a part # or a year or year range for the 9-5?

docmirror

Use real surgical hose. works great and a lot cheaper.