Quote:
Originally Posted by redneck_rheino
Hey all, thought I would start a new thread so everyone could read it and give their opinion. My truck is in the shop for a flute noise coming out of the degas cap. They couldn't find anything wrong with the egr cooler so they pulled heads. They also found nothing wrong with the head surfaces, block deck or head gaskets, no failures! What is going on here? They will use the heads again cause the measured up fine, how do they know they aren't cracked?
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I think the main problem is that the factory head bolts stretch, which is why people replace the stock ones with studs from ARP. If there isn't a proper sealing surface from the cylinder block to the cylinder head, compression, coolant, oil, etc is going to get to places it shouldn't. In your case is sounds like it was pumping compression into the coolant jackets from an in-proper sealing surface causing it to vent through the degas cap.
They should be sending both of your heads out to a machine shop to pressure test & check the mating surface for warpage (They can check for warpage at the dealer if they own a flat edge tool).
Why can't your dealer figure this out? They should know this. To simply just slap it back together with some new gaskets would be irresponsible on the dealers part.
Get some ARP studs in that thing so you don't have to go through this again, and again....
ARP 6.0L Ford Powerstroke Cylinder Head Stud Kit
