Here's a mystery I've had for some time now: When it's hot out, my car runs hot. It's fine most of the time, but once it gets above ~70 degrees out, the car starts to run hotter than it should. For example, if it's ~80 degrees out, the car might run at 220 or so when moving at highway speeds (~3000 RPMs or so, I'd guess; whatever 70 MPH comes out to in 3rd on an automatic). When ~100 degrees out, it gets up t 240, the first redline on the temp gauge. It will drop back down a bit once I get off the highway, but not down to the acceptable range. I checked for coolant leaks and found none. The coolant bottle was about 1/2 full, as it should be. I bled the system at the radiator and water pump and found no air at all. I replaced the thermostat about a year ago, but this made no difference. The water pump is about 5 years old, which is when I had an engine overhaul done. The radiator is one of the new triple-core brass ones, also 5 years old. The cooling fans are running fine, and go on at the proper temperature. Any suggestions on what I should check next? It's rather infuriating. I was thinking of bringing it to a radiator shop and having them purge the system, but I'm not sure if that would help. Thanks! -- Joe ------------------------------------ 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/dmcnewsYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> 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/