My park ave ultra runs hot (over 200 up to 216) when I am doing stop and go driving unless I turn on the heat/defrost.It runs normal on the highway.I have replaced the thermostat,the upper and lower hoses,had the system flushed out at the buick dealership,checked for holes or leaks,and had it looked at by a mechanic.What I want to know is if anybody knows why this is happening and what can be done?
May 17, 2009 at 2:05 PM
