Bleeding brakes: pressure or vacum?
Thread Starter
MBWorld Fanatic!
Joined: Feb 2003
Posts: 5,983
Likes: 21
From: Vegas and Vancouver, BC
.
Bleeding brakes: pressure or vacum?
Which is easier/better? Using a pressure bleeder like a Motive or a vacum system from Mityvac? The reason I ask, is that I just purchased a Mityvac 7300 (uses air compressor to create vacum) to replace my POS Topsider for oil changes and it came with a brake bleeding attachment.
Newbie
Joined: Jul 2009
Posts: 12
Likes: 0
From: Kansas City
02 WRX
Does the brake bleed attachment attach at the master cylinder resevoir or at the bleed valves at each caliper?
If it attaches to the caliper you will need to be constantly checking the master cylinder level to be sure you do not suck any air in while bleeding each corner, which can be a pain. While as a pressure bleeder( I use ) you simply attach to MC and bleed each wheel individually. The pressure bleeder I use also has a larger resevoir so there's no need to constantly add brake fluid.
If it attaches to the caliper you will need to be constantly checking the master cylinder level to be sure you do not suck any air in while bleeding each corner, which can be a pain. While as a pressure bleeder( I use ) you simply attach to MC and bleed each wheel individually. The pressure bleeder I use also has a larger resevoir so there's no need to constantly add brake fluid.
Super Member
Joined: Feb 2005
Posts: 624
Likes: 7
From: Las Vegas
1987 190E 2.3
All I have ever seen used on MB cars are pressure bleeders.
One of these days I will build my own
http://faculty.ccp.edu/faculty/dreed...eder/index.htm
One of these days I will build my own
http://faculty.ccp.edu/faculty/dreed...eder/index.htm
Thread Starter
MBWorld Fanatic!
Joined: Feb 2003
Posts: 5,983
Likes: 21
From: Vegas and Vancouver, BC
.
That is a cool DIY.
I had the same concerns with the vacum type with running up to the front to check the level of the reservoir. I guess that is the only con with it.
I had the same concerns with the vacum type with running up to the front to check the level of the reservoir. I guess that is the only con with it.
Super Member
Joined: Feb 2005
Posts: 624
Likes: 7
From: Las Vegas
1987 190E 2.3
Back in 04 I bleed the brakes on my 87 190E (half it's life in the 110+ degree summers) 2 bar (30 PSI) pressure no problems. A few months later I tried to bleed the brakes on my 98 Audi A4, after a few minutes the reservoir blew up. Foreman at the Audi dealer told me they have issues with the reservoir blowing up with more then 5 PSI
Trending Topics
Super Member
Joined: Mar 2006
Posts: 545
Likes: 0
From: Northeast
e300d
It's weird, I was helping somebody with a '99 Passat last year and the same thing happened...the damn fluid reservoir split and wadda mess
Good god. (VWs are bled at 14 psi vs. the 30 required for MBz.) We priced out the new reservoir and it was nearly $100.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Thread Starter
MBWorld Fanatic!
Joined: Feb 2003
Posts: 5,983
Likes: 21
From: Vegas and Vancouver, BC
.
I hope that doesn't happen to the MBZ reservoir. Though my 23 year old 190e reservoir seals recently gave-way and started leaking. Good thing that new reservoirs aren't expensive.
Last edited by Sincity; Jul 3, 2009 at 11:02 AM.
MBWorld Fanatic!
Joined: Dec 2001
Posts: 5,583
Likes: 212
From: Washington D.C.
2024 GLE63s / 2016 GLE63s (traded) / 2016 E63s / 2002 E55
any used this Motive or have any thoughts?
http://store.motiveproducts.com/shar...CS=motive&All=
What tool is used on the caliper bleed screw fro W210? Thanks.
http://store.motiveproducts.com/shar...CS=motive&All=
What tool is used on the caliper bleed screw fro W210? Thanks.
Member
Joined: Sep 2008
Posts: 186
Likes: 0
1992 300TE 4matic wagon
Which is easier/better? Using a pressure bleeder like a Motive or a vacum system from Mityvac? The reason I ask, is that I just purchased a Mityvac 7300 (uses air compressor to create vacum) to replace my POS Topsider for oil changes and it came with a brake bleeding attachment.
I looked at the instructions for power bleeding the ABS system and you make use of a bleed valve on the ABS unit itself. They tell you how to do it in the Bentley Owner's Bible, for example. But my ABS unit has no bleed screw....so I'm not so sure I want to vacuum force fluid through it.
I would try to find some existing instructions (if any), on using a power bleeder for individual brake cylinders on the MB ABS system. Or, you could jury rig the pressure bleeders linked here in the posts.....still need a bleeder valve on the ABS pump.
You don't have to run back and forth to the MC...just have a stooge (or a kid) stand there and put fluid in the reservoir.
Kevin
