Here is one more site, it gives the numbers and limits. I know that there are some really smart people on the list that can break it all down for us. So, my question is should we be using plastics? Small changes like the SS water return pipe and the SS coolant bottle may be problems in 15 or 20 years for the block. I am asking not slaming products (I have the SS pipe and want the bottle). http://www.engineersedge.com/galvanic_capatability.htm Charles To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/