Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 03-13-2019, 05:06 PM
Member
 
Join Date: Aug 2016
Location: Brisbane, Australia
Posts: 86
talljames is on a distinguished road
Unhappy Tap water for coolent top up...aahhhh!

I have been topping my x5 e53 4.4i 2005 coolent up with tap water and have just discovered recently thisis a no no due to the deposites. The first time I did it the bmw guy on the phone said to just use tap water. I canít believe I didnít investigate this earlier! Now I hope I havenít stuffed something up with the deposites.

For the past 6 months I have been topping up with tap water. Lately, it has been 2L lots and now I have found the leak to fix. I know, extremely lazy on me not to address this earlier. So, I hope I havenít damaged anything.

Waiting on delivery of coolent expansion tank to fix leak then I will get it flushed and new coolent. But what to do till then? I was thinking of buying some coolent (VALVOLINE Zerex G-48 RTU 20L) already mixed and top it up with that or even get some bmw coolent and mix. I am definately going to get some demineralised water. I just hope I havenít stuffed the engine! Ahhhh....so frustrating that I didít investigate first like I usually do.

I only hope I have a little of the original coolent in there and it hasnít been expelled.
Reply With Quote

Sponsored Links

  #2  
Old 03-13-2019, 07:00 PM
Member
 
Join Date: May 2017
Location: Colorado
Posts: 169
Attacking Mid is on a distinguished road
You'll be fine. Flush it out as best you can with distilled (demineralized) water. Then make sure you drain at least half the water out (I have to open the block drain on the 3.0L to get at least half out.) Then fill with pure BMW antifreeze until you've added half the listed capacity. Finish the fill/bleed process with your distilled water. You'll be good. The tap water isn't going to cause significant damage in the short run.

AM.
__________________
E53 2004 3.0 M54 AT Toledo Blue with Gray Leather
E83 2008 3.0 N52 AT Silver Gray Metallic with Black Vinyl
E46 1999 2.8 M52TU 5MT Black with Tan Leather 250K+ miles
Reply With Quote
  #3  
Old 03-13-2019, 07:26 PM
Member
 
Join Date: Aug 2016
Location: Brisbane, Australia
Posts: 86
talljames is on a distinguished road
Just found out a saving grace....because I have been topping up so often most of the gunk could be expelled and not have had a chance to settle.
Reply With Quote
  #4  
Old 04-26-2019, 10:05 AM
Member
 
Join Date: Aug 2016
Location: Brisbane, Australia
Posts: 86
talljames is on a distinguished road
So, I have been topping up with demineralised water for some time now and finally all my parts have arrived to replace the aux water pump, the expansion tank and cap and later the heater control valve. Now, I am thinking about the bmw coolant. When I pull all the pipes off I will loose some coolant which I suspect is just water now. Looking into the expansion tank all I see is clear water. Is there any harm in just pouring coolent directly in after the pipes are all connected again rather than pre mix? I am thinking that most of the existing is pretty diluted and probably no bmw coolent left at all and pouring it directly in will eventually mix with the existing? I live in a climate where it never gets below zero degrees. I have read that it may cause uneven heat exchange on cooling the engine and could cause problems. I was then at a later stage going to do a full flush.

cheers
__________________


2005 X5 4.4i Sport
Reply With Quote
  #5  
Old 04-26-2019, 10:30 AM
Member
 
Join Date: May 2017
Location: Colorado
Posts: 169
Attacking Mid is on a distinguished road
I already answered this above.

AM.
__________________
E53 2004 3.0 M54 AT Toledo Blue with Gray Leather
E83 2008 3.0 N52 AT Silver Gray Metallic with Black Vinyl
E46 1999 2.8 M52TU 5MT Black with Tan Leather 250K+ miles
Reply With Quote
  #6  
Old 04-26-2019, 03:52 PM
BigBody's Avatar
Member
 
Join Date: Oct 2016
Location: nyc
Posts: 205
BigBody is on a distinguished road
Get a coolant mix tester. Its like $2...
Reply With Quote
  #7  
Old 04-26-2019, 04:40 PM
Member
 
Join Date: Aug 2016
Location: Brisbane, Australia
Posts: 86
talljames is on a distinguished road
Thanks Big! I see you can get ones that use light refractometry. This will do the job after I add the bmw coolant Attack. cheers guys.
__________________


2005 X5 4.4i Sport
Reply With Quote
  #8  
Old 05-11-2019, 10:43 AM
Member
 
Join Date: Mar 2019
Location: UK
Posts: 16
titan silber is on a distinguished road
Have never used anything other than tap water in any of my cars and never had an issue. It's not like a domestic system where deposits from the thousands and thousands of litres that flow through over the years could leave deposits that cause issues. IMHO distilled or demineralised water is for batteries, not automotive cooling systems.
Reply With Quote
  #9  
Old 05-11-2019, 11:07 AM
PropellerHead's Avatar
Member
 
Join Date: Dec 2006
Location: At the wheel of a Bimmer
Posts: 1,786
PropellerHead is on a distinguished road
Quote:
Originally Posted by titan silber View Post
Have never used anything other than tap water in any of my cars and never had an issue.
Remember, tap water isn't tap water. Hard, soft, clear, or dirty in appearance, it can have as many different chemicals added by a municipality as it has minerals added by time.

Around here, our water flows about 25' underground and is said to have fallen centuries ago and is filtered naturally. I dunno ab the content otherwise, but it does not leave mineral spots on a washed car. In some coastal regions, the sun will dry tap water into hard white spots on your car. In some other cities in the US, tap water is tested as unsafe to drink.

Extremely hard or soft tap water would be very bad for a cooling system.
__________________
Reply With Quote
  #10  
Old 05-11-2019, 11:26 AM
Member
 
Join Date: Mar 2019
Location: UK
Posts: 16
titan silber is on a distinguished road
I assumed that we were talking about "normal" tap water of the sort that most people in the western world are happy to drink. Not from Flint MI or holding all sorts of organic matter in suspension.



I live in an area of the UK that has hard water and it does indeed leave white spots if allowed to dry on a car. But to put it into perspective that sort of water has perhaps 500mg of dissolved minerals per litre. So by weight 0.05% minerals and the rest good old H20. Negligible, no?


But if using demineralised or distilled water floats your boat knock yourself out - it won't do any harm.

Last edited by titan silber; 05-11-2019 at 11:50 AM. Reason: maths error!
Reply With Quote
Reply

Bookmarks

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





All times are GMT -4. The time now is 02:36 AM.
vBulletin, Copyright 2019, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.