Originally Posted by sseboy
I have 1997 Buick Park Ave NA. On the highway the temp is at 200-199 In the city with the ac on, the temp is 225. I have a new water pump and a new tstat. Fans work low and high. When car is hot i'm able to take rad cap off with out getting burned and ther is no flow. Do you think I need a new rad ?
Personally, I would NEVER
attempt to remove the radiator cap when the car is HOT
. But you did wihout getting yourself scalded. Which could mean that the radiator cap is shot because there is no(or little) pressure building up in the system. IMO, I think everything is probably fine(but then again I'm an Optimist so take my opinions lightly). I'm also a cheap SOB so I don't like to spend money when I don't have to. I'll assume (for just a minute) that since you replaced the WP and the T-Stat you also put in fresh Coolant. If NOT, then I would flush out the system with some radiator cleaner, back flush it(with one of those kits from Prestone) and put in some new coolant(50/50 mix). Did I mention a new Radiator Cap? Also, if you have never replaced the water hoses, this is also a good time to do that as well.
You didn't say where you're from, but here in the East, temps have been in the 90'*. And if your car sits in traffic with the A/C going at full blast, coolant temps at 225 sounds normal to me.
After reading this over, you stated that you have no water flow(circullation). I would think if there was abolutely No water recirculating, the car would definitely overheat. It'* rare, but the new T-stat you bought might be defective, the wrong one, or installed incorrectly. Some people on this board swear(@#$%!) by a 180 degree T-Stat. You might want to try one of those "puppies" to see if things cool off. Good Luck.