Hi, recently bought a 2005 Dodge Caravan 2.8 Diesel cargo edition (Ram Van) in the Netherlands. 245 K on it. Running around town it runs fine but driving 120km or more on the highway the temp runs up slowly to close to the red. when I slow down to 90 or 100km temp drops back but still over the mid position. Stop and go traffic is no problem, temp does not run up. Coolant level is as it should be, the reservoir looks rather rusty brown though. Looking for some advice on how to fix this..... need to make a few long distance trips soon! Thanks in advance for your comments!