Mechanics

COMPRESSION TESTED OK. ANY IDEAS??

2004 Ford Freestar • 100,000 miles

04 Ford freestar 3.9L over 65 mph overheating, never at idle. Just temp gauge run high let off gas, temp drops fast. New thermostat, temp sensor, overflow tank & cap. No mix on trans. And or oil.
Pump seems to be working new belt no leaks noticed to eye around engine or in cab thinking heater core. Water pump has small 8th in. Less play side to side on pump shaft. Oh yea compression tested ok. Started with finding cap cracked watched and its seems to bebacking up then cap relievs pressure antifreeze in tire rim wet uder overflow tank no rad. Cap just overflow for fill. Any ideas?
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Bowlday
September 7, 2012.



Radiator may be clogged.

Did they do a leak down test? You can still have compression with a bad head gasket.

Roy

Symptom indicates cooling efficiency and partially clogged radiator is the most likely and common cause.

KHLow2008
Sep 7, 2012.