How does one completely drain brake fluid? - E46Fanatics E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Go Back   E46Fanatics > Tuning & Tech > Suspension & Braking

Suspension & Braking
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 02-16-2018, 01:20 PM   #1
dutchhome
Registered User
 
Join Date: Jul 2014
Location: USA
Posts: 531
My Ride: 2004 330xi
How does one completely drain brake fluid?

I would like to completely drain the brake fluid in my wrecked parts car. What is the best process to extract all brake fluid from our beloved E46's?

Should I just use a pressure bleeder and have it pump air through each of the brake lines and clutch slave?
dutchhome is offline   Reply With Quote
Old 02-16-2018, 01:37 PM   #2
TobyB
Registered User
 
Join Date: Jan 2012
Location: car-nation
Posts: 1,754
My Ride: 2004xit, 2001ci
The very short answer is that it's not possible.
There are too many low spots, etc- the calipers, for
example, always have fluid in them.

What I do, given this, is to take things apart as far as possible
(yes, pistons out of calipers)
and take all the lines out of things like the abs pump.
Then let them drain in different positions.
And then store them in airtight bags.
Even then, fluid leaks out over time, so obviously, I've not
gotten it all out.
Compressed air helps a bunch... but it doesn't get it all.

An anti- corrosive coating helps a lot on the caliper parts.

what I've found over the years,
t
TobyB is offline   Reply With Quote
Old 02-16-2018, 01:44 PM   #3
asianisafish
Registered User
 
Join Date: Nov 2015
Location: Chicago
Posts: 948
My Ride: 330ci
Pressure bleeder I guess
asianisafish is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-16-2018, 01:49 PM   #4
paraklas
OEM ///Member
 
paraklas's Avatar
 
Join Date: Jan 2006
Location: Cyprus
Posts: 7,518
My Ride: B30_TS3
Year: 2001
Transmission: DCT GS7D36SG
Quote:
Originally Posted by dutchhome View Post
I would like to completely drain the brake fluid in my wrecked parts car. What is the best process to extract all brake fluid from our beloved E46's?

Should I just use a pressure bleeder and have it pump air through each of the brake lines and clutch slave?
Disconnect lines from ABS/DSC pump/servo, disconnect other end at calipers, gravity will drain them in a day at most. Remove calipers open bleed valve, put them upside down and will also drain.
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
paraklas is offline   Reply With Quote
Old 02-16-2018, 06:41 PM   #5
Mr Podman
Registered User
 
Join Date: Aug 2013
Location: N.A.
Posts: 1,308
My Ride: E46 Coupe
You don't want to drain all the brake fluid from your system.

podman
Mr Podman is offline   Reply With Quote
Old 02-16-2018, 10:02 PM   #6
dutchhome
Registered User
 
Join Date: Jul 2014
Location: USA
Posts: 531
My Ride: 2004 330xi
Thanks everyone. We used a pneumatic brake bleeder to pull what we could from the calipers and the clutch. It was able to extract enough fluid that there wasn't any mess when we disconnected everything. I'll be careful when we pull off the booster to make sure we don't end up with any surprises.

Sent from my [device_name] using E46Fanatics mobile app
dutchhome is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON



All times are GMT -5. The time now is 03:44 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
(c) 1999 - VerticalScope Inc. All rights reserved.