Coolant/radiator: Flush Or Drain? - BMW Forum - BimmerWerkz.com
BMW Forum BMW Forum

Auto Insurance

» Featured Product
Wheel & Tire Center

Go Back   BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E46, E90)
Register Home Forum Active Topics Gallery / Showroom Auto Loans Garage Search Today's Posts Mark Forums Read Auto EscrowInsurance

3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

BimmerWerkz.com is the premier BMW Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 02-03-2005, 05:35 AM   #1 (permalink)
n00b
 
Join Date: Jan 2005
Car:
Posts: 4
Photos:
sasham5 is an unknown quantity at this point
My 323 is 4.5 yrs old, so according to the manuals it's overdue for coolant replacement.

Question: Is cooling system _flush_ necessary? How much "should" a system flush cost? Is it simple enough so a random shop can do a good enough job, or should I only trust a german/bmw specializing shop with this? Or - is it enough to just drain the radiator via drain plug and pour new coolant+water?
sasham5 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-03-2005, 12:25 PM   #2 (permalink)
3rd Gear Member
 
Join Date: Aug 2003
Location: Baltimore MD
Car:
Posts: 729
Photos:
peterkulesza is an unknown quantity at this point
you can just drain and refill, 4.5 is not THAT long.

if you flush: be very careful. some formulations do not use edta, but citric acid. some others use even harsher acids. that can completely *^&% up the alloy the egine is made of.

if you buy flushing agent from bmw, do it yourself. i have no idea what is safe for yoyr car otherwise.
peterkulesza is offline   Reply With Quote
Old 02-03-2005, 01:55 PM   #3 (permalink)
n00b
 
Join Date: Jan 2005
Car:
Posts: 4
Photos:
sasham5 is an unknown quantity at this point
Quote:
Originally posted by peterkulesza@Feb 3 2005, 11:25 AM
if you buy flushing agent from bmw, do it yourself. i have no idea what is safe for yoyr car otherwise.
[snapback]285290[/snapback]
But how can I flush myself? I thought flushing involves a machine only shops have...
sasham5 is offline   Reply With Quote
Old 02-03-2005, 02:00 PM   #4 (permalink)
3rd Gear Member
 
Join Date: Aug 2003
Location: Baltimore MD
Car:
Posts: 729
Photos:
peterkulesza is an unknown quantity at this point
it is easier.

you can do this by reliffilng the system with flush, running the engine for a few mins, then draining the crap out of it extensively twice.

it is diffult cos you have to dispose of this properly as it contains some glycol, and you migh intoduce vapor locks which you will have to bleed. nasty and boring work.
peterkulesza is offline   Reply With Quote
Old 02-03-2005, 02:11 PM   #5 (permalink)
n00b
 
Join Date: Jan 2005
Car:
Posts: 4
Photos:
sasham5 is an unknown quantity at this point
Another question then - how do I drain well? If I understand correctly, draining the radiator still leaves a lot of stuff in the engine block, right?..
sasham5 is offline   Reply With Quote
Old 02-03-2005, 02:25 PM   #6 (permalink)
3rd Gear Member
 
Join Date: Aug 2003
Location: Baltimore MD
Car:
Posts: 729
Photos:
peterkulesza is an unknown quantity at this point
you are correct.

i do not know the location of drain plugs. some of the readers here are master techs.....
peterkulesza is offline   Reply With Quote
Old 02-06-2005, 10:19 PM   #7 (permalink)
n00b
 
Join Date: Jun 2004
Car:
Posts: 26
Photos:
Tom Busby is an unknown quantity at this point
The radiator and the engine block can be drained very easily.
Remove the plastic piece that covers the bottom of the engine.
Loosen the blue plastic screw that allows the radiator to drain into a 4 quart pot (the screw is at the bottom of the radiator and on the driver's side).
Slide under the engine on the passenger side, look up at the 2nd cylinder from the front, just in front of the catalytic converter, and you will see a bolt (maybe 12 or 13 mm) that you will loosen. Radiator fluid will pour all over so get out the way quickly. Hardly any will go in the pot but have a pot handy anyway.
Replace the block bolt, use a fresh 14mmx18mm aluminum washer, and gently tighten the blue plastic screw.
Add 3 quarts of BMW antifreeze.
Add 3+ quarts of DISTILLED water. Use a large funnel. This is slow. Start the engine and turn the heater switch on to full-hot when you are about beginning to add the 2nd quart of water.
Open the bleeder screw if there is one. Burp the air out by lightly squeezing the top radiator hose. You can feel the air bubbles as little jolts when they burp through the hose.
When the level of the fluid is right, and you don't feel or see air bubbles, you are done. TIghten the bleeder screw gently. It is flimsy.
All this takes about 45 minutes. The capacity of the cooling system is about 8.5 quarts, so obviously some of the old fluid remains in the system. That is ok, but if you want to flush it all out you have to add a cycle or 2 of adding only DISTILLED water before you get to the antifreeze stage.
I like to add RedLine Water Wetter too.
Tom Busby is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E46, E90)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Radiator Drain Plug 85-325e 3-Series (E21, E30) 0 03-26-2005 11:13 AM
Need Help! Power Drain Problem 95 540i E34 newdad52001 5-Series (E12,E28, E34, E39, E60) 2 12-07-2004 07:33 AM
Aircon Drain Hose Qs TeeUp 3-Series (E36) 4 09-27-2004 07:24 PM
where exactly is the oil drain plug?? EDawg 3-Series (E46, E90) 7 12-23-2003 01:50 AM
Battery Drain LasVegas325 3-Series (E46, E90) 4 10-06-2003 10:09 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 05:41 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.