How do I know if I have Blown Gaskets?

[kh971]

My 2004 F550 is losing coolant, it is not much, but slowly losing it.
The truck has 152,000 miles. It did run hot once at 97,000 and Ford replaced th e EGR cooler and oil cooler at the same time under warranty. Now it seems to be SIPPING coolant, no white smoke, no milky oil.
How will I know if it is the head gaskets?

Thanks alot guys!!

[kh971]

Oh yeah no modifications to the truck, except a S&B air intake.

[lubbockguy1979]

Is there a white residue around the degas bottle? With a small coolant loss it could be a lot of things. There is a write up on the net some where detailing how to diagnose a egr failure vs head gasket failure. My truck does consume coolant at times. Generally if I run it really hard it will puke. If I don't run it hard I don't loose coolant. if you were to have a way to check the oil temp and coolant temp at operating temps they should be with in 15* of each other. A partially blocked oil cooler will cause the truck to consume coolant. If not caught early and coolant gets low it is possible to blow the head gaskets.