I have a 2002 Ford F150 with a 4.6L, the temp gauge pegs out hot and the oil light comes on. The pressure in the coolant causes it to come out of the fill tank under cap. I have replaced the cap, radiator, water pump, thermostat and even put some Blue Devil in the cooling system. The truck will not "idle" for longer than 20 minutes before running hot. However coolant on ground from cap feels cool... Idea?

 

Blown head gasket would be my guess on the coolant issue.

Oil light coming on is probably low pressure from a clogged up oil pickup in the pan.

Good luck!

Mitch

 

Oil and temp light are a combo light. If there is an issue with one, both illuminate. Might be a head gasket, not positive. Pull the dipstick and see if its milky or not. If it is, blown gasket. Just a shot in the dark though, but there might be air in the system. Either that, or a real mean blockage going on. Just my guess though.

 

I have the same problem you had. I replaced t-stat, radiator, coolant temp sending unit. Heater core. No result. Have you figured out the problem with yours??? Need help.

 

Since he never returned to this site since the day after posting his question, it's pretty unlikely he's going to answer you.