Overheating 4.7. seeking advise. troubleshooting started

[Recoil]

Should I turn back to the idea of the head gasket? Possibly a leak down test? Is there a possibility that exhaust gases never made it into the coolant reservoir do to lack of circulating coolant? Would the added exhaust gasses from a failed headgasket impede coolant circulation?

The 4.7 was well known for head gasket problems.

 

[jws123]

The 4.7 was well known for head gasket problems.

Only when overheated they never just blew head gaskets I have rebuilt tons of them

 

[RobA]

Good news problem solved, the radiator fixed it. We installed the new thermostat backwards, when we replaced the radiator. And it took us a couple of tries to figure out what was going on. The lack of coolant flow explained by switching directions on the thermostat.

 

[Stoffregen Motors]

That's good news!

Good news problem solved, the radiator fixed it. We installed the new thermostat backwards, when we replaced the radiator. And it took us a couple of tries to figure out what was going on. The lack of coolant flow explained by switching directions on the thermostat.