Demineralized Water

Reply

  #1  
Old 01-08-07, 12:48 PM
Member
Thread Starter
Join Date: Apr 2005
Location: Philadelphia
Posts: 550
Demineralized Water

Hello,
Can I be confident that when a dealer gives my vehicle a reverse flush of the cooling system, the service mechanic will add demineralize water to the antifreeze instead of tap water? Has anyone caught them using tap water?
 
Sponsored Links
  #2  
Old 01-08-07, 08:54 PM
Member
Join Date: Nov 2006
Location: Jersey
Posts: 526
It depends on the dealership.
I would not be confident about this.
Why not just ask.
 
  #3  
Old 01-09-07, 04:09 AM
Member
Thread Starter
Join Date: Apr 2005
Location: Philadelphia
Posts: 550
I just checked my maintenance manual and it appears I need not be concerned about this until my vehicle has 100,000 miles before replacement is due. But it needs to be checked after every 15,000 miles to be sure that I am protected. Its been about over 18 years since I purchased a new vehicle and back in the old days, the recommendation was to change it every three years I believe. The vehicle is a Toyota 4Runner. However, I will wait and see if others have an opinion on this.
 
  #4  
Old 01-09-07, 05:16 AM
the_tow_guy's Avatar
Group Moderator
Join Date: Feb 2001
Location: SW Fla USA
Posts: 11,541
I confess in all the years I've owned cars and trucks (many of them Toyotos), I have NEVER used demineralized water in the cooling system.
 
  #5  
Old 01-09-07, 05:37 AM
Member
Join Date: Oct 2000
Location: Livonia, Michigan
Posts: 923
Calcium is a mild poison to cooling systems. Plus there are other hard minerals in tap water that can wreak havoc with cooling system chemistry. I too have used tap water in the past. But it's better to use demineralized or distilled water to make up coolant. I have it available to me on tap at work, so it's a no-brainer to me.
 
  #6  
Old 01-09-07, 07:59 AM
Member
Thread Starter
Join Date: Apr 2005
Location: Philadelphia
Posts: 550
Thanks all,
The two new vehicles that preceded my present purchase had some type of buildup on the interior radiator fins that occured after using tap water and I don't want this to happen four years down the line like it did before.
 
  #7  
Old 01-09-07, 08:04 AM
Group Moderator
Join Date: Oct 2004
Location: WI/MN
Posts: 18,543
Ask. If they use tap water, bring 2 jugs of distilled water with you and ask them to use that instead. You could also just do this yourself, it's a pretty straight forward job.
 
Reply

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 Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes
'