How to Repair a cadillac engine that overheats

*Want to own the tools I use ?? Click on the amazon link below to get my top 5 Tools I use* Automotive Test Light- https://amzn.to/3z1Pdxa Flexible Backprobe- https://amzn.to/3Pyr3zO Multimeter- https://amzn.to/3PbuT23 OBD Scan Tool- https://amzn.to/3zaNWnq Wire Piercing Probe- https://amzn.to/3OecWhT On this video I'm repairing a 2002 Cadillac Deville 4.6 lt northstar engine. Customers complaint was that the cars temperature would be good at idle but once the car was on the road it would overheat