Pressure testing for HG failure?
I have an 04 6.0 and had it at the dealership at about 65k for puking coolant. Based on what I have read here it sounded like headgaskets to me. It would only puke when towing(14k lb. towhauler). The dealership told me they pressure tested the system and it was not the head gaskets. They replaced the oil cooler, egr cooler, radiator, and degas bottle. I had arp studs in my hand at the time of the repair but they told me I did'nt need them. This repair was done under a "good faith warranty" since my truck was out of the 5 years, so I did'nt press them on trying to get the studs put in. Last week (72k miles) while towing I noticed the smell of coolant again, and once again found coolant residue around the degas bottle. A local diesel mechanic told me the pressure test the dealership does will not usually determine head gasket failure, and that the true test is putting the truck under a load. Just wondering if anyone has the same opinion. I have done the up-pipe delete from FCDP and think the full delete, studs and gaskets are next.