E90Post
 


E92 Lighting
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Coolant flush??



Reply
 
Thread Tools Search this Thread
      05-07-2012, 06:22 PM   #1
asado111
Second Lieutenant
12
Rep
295
Posts

Drives: BMW 335i
Join Date: May 2011
Location: TX

iTrader: (0)

Coolant flush??

Is a coolant flush necessary?
Appreciate 0
      05-07-2012, 06:33 PM   #2
ndog14
Banned
United_States
29
Rep
1,746
Posts

Drives: E90 328xi 6MT
Join Date: Aug 2011
Location: Pittsburgh, PA

iTrader: (0)

Quote:
Originally Posted by asado111 View Post
Is a coolant flush necessary?
Eventually, yes.

As vague as that sounds, the circumstances around your question are vague.
Appreciate 0
      05-07-2012, 06:35 PM   #3
E90Company
Major General
E90Company's Avatar
No_Country
79
Rep
6,136
Posts

Drives: Car
Join Date: Mar 2012
Location: FL

iTrader: (2)

Yes
Appreciate 0
      05-07-2012, 06:42 PM   #4
CubanJJ09
Banned
United_States
135
Rep
12,692
Posts

Drives: like an asshole
Join Date: Feb 2008
Location: Chicago Burbs

iTrader: (2)

Garage List
2007 BMW 335i  [3.09]
Send a message via AIM to CubanJJ09
Maybe
Appreciate 0
      05-07-2012, 06:58 PM   #5
mike3000fl
Banned
No_Country
81
Rep
2,731
Posts

Drives: 06 330i
Join Date: Feb 2010
Location: Tampa

iTrader: (0)

i change coolant every couple years but I have not flushed in the traditional sense.

my water pump is original at 149,000 miles.
Appreciate 0
      05-07-2012, 06:59 PM   #6
Healey3000
Second Lieutenant
2
Rep
291
Posts

Drives: 2008 328i, with 3 pedals
Join Date: Jan 2008
Location: San Francisco Bay Area, USA

iTrader: (0)

Quote:
Originally Posted by asado111 View Post
Is a coolant flush necessary?
Hi,

BMW plays a strange game on this one. The official line from HQ appears to be that it is a lifetime fill yet they say it is condition based. The dealers therefore get to make their own recommendations and HQ will support the dealer's position.

This is very strange but I think it lets BMW get out of putting coolant changes on the list of free maintenance items. On my car, when I took it in for its final maintenance, they told me I should replace the coolant but BMW won't cover it.

I am personally not a fan of lifetime fills of anything in a modern car. Granted, fluids have improved a lot but they are still subject to degradation. It's very interesting to note that these lifetime fills started showing up after BMW offered the free maintenance; coincidence??

Coolant contains anti-corrosive agents that protect the head and block. Over time, these get depleted and then you are at risk for head gasket failure or head/block damage. I was "trained" on my E34 with the M30 engine as on that car, a coolant change every two years was critically important. The only approved coolant was the OEM one, with good reason.

In a nutshell, I would recommend that you flush the coolant to maximize engine and pump life. Others may have a different opinion.

Regards.
Appreciate 0
      05-07-2012, 07:27 PM   #7
Tom K.
Major General
Tom K.'s Avatar
United_States
66
Rep
5,476
Posts

Drives: '07 328iT, '13 Boxster
Join Date: Mar 2008
Location: Maryland

iTrader: (0)

BMW went to a "Lifetime" (100,000 miles?) coolant around 2006 or so. Prior to that, it was to be changed every 4 years.

Tom
Appreciate 0
      05-07-2012, 08:18 PM   #8
5tony
Private First Class
United_States
13
Rep
198
Posts

Drives: '15 X5 35i/'11 335i M-Sports
Join Date: Jul 2010
Location: Atlanta

iTrader: (1)

Quote:
Originally Posted by Tom K. View Post
BMW went to a "Lifetime" (100,000 miles?) coolant around 2006 or so. Prior to that, it was to be changed every 4 years.

Tom
The funny thing is that it's the exact same coolant they used ten years ago!
__________________
Appreciate 0
      05-07-2012, 08:24 PM   #9
Healey3000
Second Lieutenant
2
Rep
291
Posts

Drives: 2008 328i, with 3 pedals
Join Date: Jan 2008
Location: San Francisco Bay Area, USA

iTrader: (0)

Quote:
Originally Posted by Tom K. View Post
BMW went to a "Lifetime" (100,000 miles?) coolant around 2006 or so. Prior to that, it was to be changed every 4 years.

Tom
I called BMW NA to discuss this issue and they tap-danced around in fine fashion. I could almost feel the customer service "manager" squirm as I pressed him.

Regardless of what they choose to call it, BMW is talking out of both sides of their mouth on this topic. For what is costs to have the coolant flushed (or DIY, preferably), the payoff could be substantial.

Preventive maintenance - I'd easily convince myself to stretch out a gearbox oil change, but not coolant.

Regards.
Appreciate 0
      05-07-2012, 08:54 PM   #10
jphughan
Brigadier General
jphughan's Avatar
United_States
90
Rep
3,780
Posts

Drives: 2011.75 M3 E92 6MT
Join Date: Mar 2011
Location: Austin, TX

iTrader: (0)

BMW says lifetime fill these days but that's relatively recent and wasn't accompanied by a change in the fluid.

Mike Miller's Old School BMW Maintenance Schedule says to flush every 2 years.
__________________
For sale here:
11 M3 E92 Le Mans | Black Nov w/ Alum | 6MT | Premium 2 | Convenience | 19" | EDC | Prem Audio | Moonroof | BMW Apps | Yoko AD08 R | Vorshlag Adjustable Camber Plates | StopTech ST-60 380mm BBK | Castrol SRF Fluid | ModMyNav.com rear camera | ECS Tuning Sunglasses Holder
Appreciate 0
      05-07-2012, 08:55 PM   #11
TheTal0n
Captain
TheTal0n's Avatar
20
Rep
605
Posts

Drives: 2006 330i
Join Date: Sep 2011
Location: Utah

iTrader: (0)

I think its a good idea...Just cant seem to find any coolant suitable except buying from the dealer/online.
Appreciate 0
      05-07-2012, 10:04 PM   #12
Clifton
Second Lieutenant
Clifton's Avatar
United_States
4
Rep
248
Posts

Drives: Cars with tires
Join Date: Jul 2009
Location: Earth

iTrader: (0)

To add a data point to the conversation, 2003 E46's have 4 year intervals for flushing coolant. On 2004 E46 cars, BMW dropped the coolant flush from their maintenance program and called the coolant "lifetime". BMW, however, did not change or update the coolant.

Flush your coolant.
__________________
Regards,
Clifton

Last edited by Clifton; 05-08-2012 at 08:55 AM.
Appreciate 0
      05-08-2012, 08:46 AM   #13
F32Fleet
BMWCCA since '03
F32Fleet's Avatar
United_States
123
Rep
5,643
Posts

Drives: 2015 435i
Join Date: May 2005
Location: Atlanta (Vinings)

iTrader: (0)

OEM is just G48 and years ago I was told to flush when changing brands of coolant whereas drain and refill if using same. Flushing takes a lot of distilled water.
Appreciate 0
      05-08-2012, 11:15 AM   #14
Tom K.
Major General
Tom K.'s Avatar
United_States
66
Rep
5,476
Posts

Drives: '07 328iT, '13 Boxster
Join Date: Mar 2008
Location: Maryland

iTrader: (0)

Quote:
Originally Posted by Clifton View Post
To add a data point to the conversation, 2003 E46's have 4 year intervals for flushing coolant. On 2004 E46 cars, BMW dropped the coolant flush from their maintenance program and called the coolant "lifetime". BMW, however, did not change or update the coolant.

Flush your coolant.
I wasn't sure of the exact year when stating "2006 or so", but I recall that my '03 Z4 still called for the 4 year flush. By 2007, my dealer initially wasn't going to cover the service but after checking, they did with no problem.

Now, due to the "new and improved coolant" I don't have to worry for the rest of my life (or is it my car's life?).

Tom
Appreciate 0
      05-08-2012, 12:41 PM   #15
Clifton
Second Lieutenant
Clifton's Avatar
United_States
4
Rep
248
Posts

Drives: Cars with tires
Join Date: Jul 2009
Location: Earth

iTrader: (0)

Quote:
Originally Posted by Tom K. View Post
Now, due to the "new and improved coolant" I don't have to worry for the rest of my life (or is it my car's life?).

Tom
Oh it is *special* alright, Tom. All it takes to make the coolant new and improved is a new container and an updated label. To make it last a lifetime, they didn't even need to change the ethylene glycol formula to do it, so it must be magic.

New vs. old gallon of BMW coolant:


The current (left) vs. previous label of the same BMW coolant. Note the subtle addition of "Long-Term" and the exclusion of "change coolant every 3 years":
__________________
Regards,
Clifton
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Forum Jump


All times are GMT -4. The time now is 08:27 AM.




e90post
e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST