Pressure testing for HG failure? - Ford Powerstroke Diesel Forum
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Old 02-19-2010, 08:28 PM
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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.
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Old 02-20-2010, 07:53 AM
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what amount of cooling system pressure are you seeing under full load wide open throttle? when I have gaskets failed I almost always see 21-22psi plus. if your oil and egr coolers are good, your fan clutch and cooling system are operating properly, then more than likely you have a gasket issue. like you said you need to really load the truck up hard to get it to start puking. monitor your ect and eot temps looking for no more than 15 degree differance to eliminate an restircted oil cooler.
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Old 02-22-2010, 06:36 PM
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Thanks for the input, I have another trip coming up and plan on loading it up again. I am going to bit the bullet and have the studs and gaskets replaced, and have the egr cooler removed while they are in there. I plan on having this truck for a while and want the piece of mind.
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