I have always heard that the hard water lead to deposits which can clog the passages or greatly reduce the efficiency. The distilled water supposedly does the opposite and tries to leach minerals/metals from the cooling system and put them in solution. The lead solder seems to be the most likely to be affected. Does your BMW possibly have an aluminum radiator with plastic tanks? That might account for the distilled water recommendation. Bill Huff At 2/11/200812:47 PM, Ryan Hill wrote: >I've always understood that distilled water was recommended but >never really worried about it too much as we have such soft water >here in this part of the world. I was always under the impression >that it was the hard minerals in the water that did the damage over time. > >Recently, I replaced the rad, water pump, hoses, thermostat and >housing on my BMW and did some research on what antifreeze I should >be using after flushing the system.(I'm a bit anal that way) Again, >even for this newer well refined German machine, it is recommended >that distilled water should always be used. > >Ryan Hill >65 Chrysler 300 >68 Dodge Charger > > >---------- >To: olson77@xxxxxxxxxxxxx; Chrysler300@xxxxxxxxxxxxxxx >From: czbill@xxxxxxxxxx >Date: Mon, 11 Feb 2008 10:26:28 -0500 >Subject: Re: [Chrysler300] WATER,WATER EVERYWHERE >Hi Gerald, >I too have read not to use distilled water. As I remember, the >reason given was that since it has no minerals in it, it wants to >leach minerals from it's surroundings. In the case of one's >radiator, that would be lead solder and other softer metals. That >may be where solder bloom comes from. The article recommended tap >water or bottled drinking water I believe. Don't know if it is true >or not, but I never used distilled water and never had a problem, but >then we always had good tasting drinking water. Maybe some of that >West Texas water might not be the best. :-P >Bill Huff >At 2/11/200810:00 AM, GERALD OLSON wrote: > >New subject for the group. Somewhere in my travels > >I've heard ah strange rumor that distilled water in > >the 50%-50% coolant mix is undesirable and I'm not > >sure why! What's ah poor country boy tah do when > >living with well 'n septic? Once it goes thru' the > >softener, It can't be too desirable. Am I splitting > >hairs here? False rumor? Ice Fishin' for comments in > >Blue Lips, Michigan, Jerry > > > > >[Non-text portions of this message have been removed] > > > > > >---------- [Non-text portions of this message have been removed] To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: mailto:Chrysler300-digest@xxxxxxxxxxxxxxx mailto:Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/