I don't like the looks of this.. - Ford Powerstroke Diesel Forum
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Old 04-23-2013, 02:49 PM
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I don't like the looks of this..

sooo i bought my truck about 3 months ago and all was well. truck had 99k on it and already had egr delete, arp head studs, Black Onyx head gaskets, oil cooler, hypertech tuner and a few other things..

ever since i bought the truck the heat has been kind of odd.. it blows hot and then will go cold unless you rev it, speed up, or go up a hill.

coolant level was low so i filled it up to about where is should be. and that was that.

about a week later i checked the coolant again and it was very low. not even in the degas bottle. so i filled it up to just over the low when it was cold.
coolant has puked out the cap within 30 minutes of EASY driving since.

whats wrong with my truck? could it really be a headgasket issue even after it has been bulletproofed? can i continue to drive it like this??
i don't really have the money to pull the heads off anytime soon.

Thanks for the help!
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Old 04-23-2013, 03:45 PM
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If the head stud install wasn't perfect, it's absolutely possible to have issues. Off the top of my head, I could see problems if the heads weren't magnafluxed and decked, if the block surface wasn't prepped correctly, and if the studs weren't torqued to the proper number or in the wrong sequence.

There's a very good chance that if all of the above were perfect you're still screwed. Black Onyx gaskets don't have a very good reputation.
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Old 04-23-2013, 03:47 PM
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The black onyx gaskets are known to to fail. I would advise against driving untill you ateast have a way to monitor your temps. Ect and eot primaraly. Edge insight or a scanguage are theeasiest ways to go about doing that

Sent from AutoGuide.com Free App
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Old 04-23-2013, 03:56 PM
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This is exactly what I was experiencing. Kept adding coolant and switching to new coolant caps. Had to face facts and admit my heads were leaking.
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Old 04-23-2013, 06:17 PM
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alright.. so its probably an issue with the head gaskets..? could it be caused from anything else? i mean i know it could very well be the head gaskets but.. i just feel like the chances of that have got to be extremely low considering they had gotten studded and replaced like 10k miles ago.
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Old 04-23-2013, 07:31 PM
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Sorry to say its definitely headgaskets my black onyx hg's lasted a month, then I used Oem.
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Old 04-23-2013, 08:22 PM
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Quote:
Originally Posted by Boeing747 View Post
alright.. so its probably an issue with the head gaskets..? could it be caused from anything else? i mean i know it could very well be the head gaskets but.. i just feel like the chances of that have got to be extremely low considering they had gotten studded and replaced like 10k miles ago.
From my knowledge, it is the head gaskets for sure if you have the egr delete. Are you positive it is deleted? The cylinder pressure is being leaked into your coolant system causing the excess pressure. If you have the tools and space doing your heads wont be costly since you have everything else done already.
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Old 04-24-2013, 02:53 AM
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Quote:
Originally Posted by Boeing747 View Post
alright.. so its probably an issue with the head gaskets..? could it be caused from anything else? i mean i know it could very well be the head gaskets but.. i just feel like the chances of that have got to be extremely low considering they had gotten studded and replaced like 10k miles ago.
You're in Stage 1: Denial.

After my head gaskets blew on the stock head bolts, I had the truck studded and used OEM gaskets. A friend used the same tech around that time as well. Both of us had blown head gaskets less than 10k miles later. My best guess is that the installs were not done correctly.

Google Black Onyx head gaskets and I'm willing to bet you progress to Stage 2: Acceptance.
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Old 04-24-2013, 04:54 AM
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Probably your gaskets, The black onyx are known to fail even with arp studs...


Tom
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Old 04-24-2013, 05:02 AM
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that sucks man atleast you can reuse the studs... be sure to get OEM gaskets this time.
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