I have a 2000 oldsmobile intrigue. I replaced the water pump new, thermostat new, hosing new, gaskets new, reservoir new, and my car still keeps over heating. It was on for a good 4 hours without over heating while at the garage. After I decided to take it home it started over heating. I don't know what it could possibly be.
My car has 200000 miles.
My car has an automatic transmission.
The radiator may have partial blockage that will cause the overheating after you put a load on the engine from driving. Have the radiator checked with a temperature probe to see if parts of the radiator has blocked passages. If it does then have radiator replaced or power flushed by a radiator shop. They may be able to clean it out but it may cost more than a new replacement radiator.
If you decide to get this fixed, consider YourMechanic, as a certified technician can help you diagnose your overheating problem and make the necessary repairs to your car. Good luck.
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing