6.0 coolant blowing everywhere!

[famousamos0901]

So i have an 04 6.0. A year ago i had the egr deleted the heads studded and black onyx head gaskets put in. Yester after 15 minutes of driving i hear my fan kick on really loud, like a school bus, i look down and all temps are reading perfect. I drive it up to my buddys and find the return hose blew off, we figured bad clamp put it back together and filled her back up. Two minutes into running at idle the truck builds pressure fast. no leaks though. i drive it home and when i get home coolant is leaking everywhere upfront after about five minutes of sitting. Hose was still on but an amazing amount of pressure, thermostat is working perfectly and trucks temp never ran hot on the gauge! i need help i know someone out there has had this happen before.

[bwmtnbiker]

What return hose are you talking about?

I'm almost willing to bet your black onyx gaskets.are blown. They have been rumored to fail... any way for you to test cooling system pressure with a gauge? Maybe try getting a new Degas cap. They are only $12 or so.

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[famousamos0901]

everythings new, and no coolant in oil. where could this coolant be coming from? and the hose coming from bottom of resorvoir to front of engine.

[Term3]

Could you tell where the coolant was coming from? By the way, Black Onyx head gaskets are not well liked on the forums due to their high failure rate. Should have used OEM head gaskets.

[bwmtnbiker]

Originally Posted by Term3

Could you tell where the coolant was coming from? By the way, Black Onyx head gaskets are not well liked on the forums due to their high failure rate. Should have used OEM head gaskets.

That is true but I don't think this information was available back a year ago.

Just because the oil and coolant aren't mixed doesn't mean your head gaskets aren't bad. They could still be blown. Try to see where itseaking at

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[famousamos0901]

ya didnt know a year ago. and currently dont have time to pull heads or money because we are moving. leaking from front of engine in that mess of hoses and up pipes on the front of engine.

[bwmtnbiker]

Originally Posted by famousamos0901

ya didnt know a year ago. and currently dont have time to pull heads or money because we are moving. leaking from front of engine in that mess of hoses and up pipes on the front of engine.

You said there is excessive pressure in the system or is it just leaking? With out a pressure gauge its hard to say what the pressure really is. Is it coming out of the Degas cap? I would drain the radiator and pull all the hoses off an inspect them for holes or something.

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[famousamos0901]

possibly degas, tons of pressure and when truck shut off it starting leaking from the degas i think, cant really see exactly.

[bwmtnbiker]

Originally Posted by famousamos0901

possibly degas, tons of pressure and when truck shut off it starting leaking from the degas i think, cant really see exactly.

Alright, you need to find a way to test for blown head gaskets. The only things that cause high pressure in the cooling system, that I am aware of, are blown head gaskets or a blown egr cooler. Seeing as how you removed the cooler, its looking like head gaskets to me.

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[HAULINGASS]

Were the heads checked before the onyx went on? Mine Puked w/ 5 month old OEM Gaskets and studs. Turns out, the heads were warped. Previous owner was a dumbazz. Hopefully you have better luck than myself.