GO TO WWW.AUTOZONE.COM AND LOOK FOR THE SPECS. LINK
The thermostat on a 1997 Ford F-250 is located under the upper hose assembly in the radiator. To locate the thermostat, drain the radiator halfway and remove the hose at the top of the radiator.
Would have been built for R12, can be converted to R134a.
sounds like your thermostat might be sticking open ( or wrong or no thermostat )
The 2014 Lexus IS-250 has 24 valves.
The 2010 Lexus IS-250 has a V6 engine.
The 2013 Lexus IS-250 has 24 valves.
The 2011 Lexus IS-250 has a V6 engine.
The 2007 Lexus IS-250 has 24 valves.
The 2010 Lexus IS-250 has 24 valves.
The 2009 Lexus IS-250 has 24 valves.
The 2011 Lexus IS-250 has 24 valves.
The 2006 Lexus IS-250 has 24 valves.