Welcome to 911UK
The only place for Porsche, 911uk is the definitive enthusiast and resource site for the Porsche 911.
Registration is fast, simple and absolutely free, so join up today for full access to the site and benefit from latest member offers.

Porsche Classifieds
Sell Your Porsche on 911uk
Create a Free Classified Advert
Search Ads
Classified Adverts FAQ
Trade Classified Information
Buyer & Seller Fraud Protection
Consumer Rights Act
Pre Purchase Inspection (PPI)
Porsche Car Sourcing
Porsche Cars Wanted
Official Porsche Centre Reviews
Model
Stock
Porsche 911
992 : 2019- 1
991 : 2011- 17
997 : 2004- 80
996 : 1997-2005 32
993 : 1993-1998 4
964 : 1989-1993 2
Carrera 3.2 : 1983-1989 3
Carrera SC : 1977-1983 1
930 Turbo : 1975-1989 0
Early 911 : 1964-1977 0
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 25
Cayman : 2005- 16
Cayenne : 2003- 2
Macan : 2014- 4
Panamera : 2009- 0
912-914-924-928-944-968 1
959 - CarreraGT - RaceCar 0
Car Parts For Sale & Wanted
Other Items For Sale & Wanted
Wheels Tyres For Sale & Wanted
Number Plates For Sale Wanted

Porsche Services
Porsche Body Shop Repair
Paint Protection & Wrapping
Porsche Classic Insurance
Porsche Classic Parts
Porsche Classic Restoration
Porsche Design Collection
Porsche Engine Gearbox Rebuild
Porsche Heritage & History
Porsche News
Porsche Picture Gallery
Win a New Porsche 911

Porsche Parts
Body Parts, Body Styling
Brakes, Clearance
Electrical, Exhausts
Engine Cooling, Engine Electrical
Engine Rebuild, Heating Cooling
Interior Incar, Lighting
Rubber Seals, Service Parts
Steering, Suspension
Transmission, Workshop Tools
Early 911, 911 - 930, 928 - 968
964 - 993, 996 - 997, Boxster
Cayman, Cayenne, Panamera

Porsche Model Range
911 [992] 2018-Current
Porsche 911 [992]
911 [991] 2011-2019
Porsche 911 [991]
911 [997] 2004-2012
Porsche 911 [997]
911 [GT] GT1-GT2-GT3
Porsche 911 [GT]
911 [996] 1997-2005
Porsche 911 [996]
911 [993] 1993-1998
Porsche 911 [993]
911 [RS] RS-RSR
Porsche 911 [RS]
911 [964] 1989-1993
Porsche 911 [964]
911 3.2 1983-1989
Porsche 911 3.2 Carrera
911 SC 1977-1983
Porsche 911 SC
911 [Early] 1964-1977
Porsche 911 [Early]
Boxster & Cayman
Porsche Boxster & Cayman
Cayenne & Panamera
Porsche Cayenne & Panamera

911uk Site Partners

Post new topic   Reply to topic
Author Message
Newbe
Newbie


Joined: 21 Apr 2019
Posts: 42



PostPosted: Sat Aug 17, 2019 7:43 pm    Post subject: Bleeding master cylinder help!! Reply with quote

Hi All

I was changing my brake lines amongst other things and have introduced air into the master cylinder. Stupidly, my own fault, I had the car jacked up one side and wasn't watching the level☹️

Now I have oil coming out the calipers when bleed them but the pedal goes to the floor.

What's the best way to bleed a master cylinder?
 
  
View user's profile Send private message
   
deMort
Dijon


Joined: 21 Mar 2015
Posts: 7161
Location: Brighton


PostPosted: Sat Aug 17, 2019 8:05 pm    Post subject: Reply with quote

If the master cyl has drained out then you need to bleed each caliper from both bleed nipples .

We are talking a liter at least , quarter per caliper .

Pressure bleeding ( a machine that does it ) is best but if not then someone pressing the brake pedal .. so undo nipple .. brake press .. do up .. release pedal release nipple press brake pedal.. and so on .

X 8 nipples .. do each one .
_________________
.

My Daughter's Crowdfunding has hit the target see Here

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Now At An Indy.
 
  
View user's profile Send private message
   
Newbe
Newbie


Joined: 21 Apr 2019
Posts: 42



PostPosted: Sat Aug 17, 2019 8:17 pm    Post subject: Reply with quote

Cheers for the reply.

Do I start at the furthest caliper from the cylinder? I could kick myself!!

I've seen stuff online about running a pipe from the front caliper back into the reservoir and keeping it topped up until the air pushes through?? Is this an option if I buy pipe long enough?

Or just stick to the old fashioned way as per your post??

Would I have to bleed anything else?? I hoping there was a bleed on the mast cylinder it's self in case any air was trapped.
 
  
View user's profile Send private message
   
monster
Imola


Joined: 04 Sep 2010
Posts: 785
Location: Bournemouth


PostPosted: Sat Aug 17, 2019 8:29 pm    Post subject: Reply with quote

Take Demorts answer over mine, but yes as you suggested I would start with the furthest corner away from the master cylinder and work your way closer with each corner - that's the norm.

One word of caution! - Go real careful when you come to loosen off the bleed nipples, if they have not been loosened recently they can seize.

I sheared off 5 out of 8 of mine when attempting to bleed them.
 
  
View user's profile Send private message
   
Newbe
Newbie


Joined: 21 Apr 2019
Posts: 42



PostPosted: Sun Aug 18, 2019 3:15 pm    Post subject: Reply with quote

Thanks for the replies.

Harsh lesson for me.

I bled all bleed nipples using around 1.25 litres of brake fluid. Brake pedal now rock hard.

Most of the air was in the passenger front side.

👍
 
  
View user's profile Send private message
   
Display posts from previous:   
Post new topic   Reply to topic   All times are GMT - 12 Hours
Page 1 of 1

 
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum
You cannot post calendar events in this forum