The coolant in my resevoir is starting to get rusty (not oily). I have a 2000 SSEi and the engine has about 45,000 miles on it. Why is this happening and what do I need to do to get it fresh again?
Thanks!
Coolant Rusty...
- bill buttermore
- Retired Gearhead

- Posts: 3989
- Joined: Mon May 19, 2008 12:35 pm
- Year and Trim: 98 Caravan is the daily driver 215K
- Location: Ames, Iowa
Re: Coolant Rusty...
Could be rust because the anti-rust additives have become depleted or because oxygen has entered the system and accelerated the deterioration of the coolant if it is Dex. Could be a precipitate that forms from the mixing of phosphated coolants with Dex. The cure is to flush the cooling system thoroughly and replace the coolant with "mixes with any" type coolant. Here is a link on how to flush:Reverse Flush your Cooling System
Last edited by bill buttermore on Sun Nov 23, 2008 2:50 pm, edited 1 time in total.

1998 3.8 Dodge Caravan 214K
2000 3.3 Dodge Caravan 175K
1949 Plymouth Special Deluxe 4-dr sedan 25K (needs some work!)
- mshipon
- SLE Member

- Posts: 58
- Joined: Sun Jun 01, 2008 6:57 pm
- Year and Trim: 2000 Bonneville SSEi
- Location: Andover, MA
Re: Coolant Rusty...
Thanks for replying... please list the coolant flush link again... not showing...

