Arp Studs + Black Onyx= FAIL - Ford Powerstroke Diesel Forum
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  #1  
Old 12-23-2011, 04:14 AM
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Arp Studs + Black Onyx= FAIL

I had my truck studded with black onyx gaskets about a 1 1/2 years & 27K miles ago...this was done by a really big ford dealer and they "checked the heads" but didn't have them machined.

So I started puking really bad so I got a block tester and she went green really quick. It also seems to be a little down on power.

My question is if I have someone that really knows what they are doing I.E BTS Brains Truck Shop do the studs with oe gaskets and he always decks the heads will I still have problems in the future if I want 550rwhp?

I can't afford to keep studding this DANG truck.

Maybe I dont make enough money to own a ford

Or should I get it fixed and just sell it?
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Old 12-23-2011, 04:41 AM
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It doesnt matter what gaskets you use IMO if you dont properly check the heads. They MUST be FLAT. So regardless of what else gets done, they have to be checked for flatness and sealing. IMO if you install a set of heads that are checked for flatness, sealing, magnafluxed and a new valve job performed; you should be fine. I would also recommend oem head gaskets as a personal opinion. Hope this helps.
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Old 12-23-2011, 04:47 AM
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Sorry to hear about that, man. It's exactly what was said in the post above. The deck surfaces MUST BE FLAT or you are asking for problems. In addition, the black onyx gaskets just shouldn't be used. Most folks who have used them report the same kind of problems. Compare that to mine, which has been running 70k miles with ARP studs and OEM gaskets. Done correctly, they can last a LONG time. Best of luck in your decision.
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Old 12-23-2011, 04:50 AM
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Unfortunately, the Ford procedure for checking the heads is not sufficient (as you learned). The only thing they do is check the flatness with a straight edge and a feeler gauge over a few areas. No magnafluxing, no hardened valve seats installed, nothing else.
With the proper head and block prep, the head gaskets should last the life of the engine, even with 550 RWHP.
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Old 12-23-2011, 04:55 AM
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Quote:
Originally Posted by NYC F-350 View Post
Unfortunately, the Ford procedure for checking the heads is not sufficient (as you learned). The only thing they do is check the flatness with a straight edge and a feeler gauge over a few areas. No magnafluxing, no hardened valve seats installed, nothing else.
With the proper head and block prep, the head gaskets should last the life of the engine, even with 550 RWHP.
Being the knowledgeable person that you are

have you heard of anyone popping OEM gaskets & studs when the heads were machined? If so what power level?
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Old 12-23-2011, 05:08 AM
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At above 1000 hp.
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Old 12-23-2011, 10:05 AM
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And while it's apart again. Have the block surface checked for flatness as well as the heads.

I went through the stud adventure when people were still saying the black onyx gaskets were the stuff. At the time, I got the oem's because the dealer only charged me $100. Said they had a mixed up order come in and these were extra.

BTW, that's a heart sinking feeling when that stuff happens. Sorry to hear that. Hope you get'er fixed and going again.
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Old 12-23-2011, 10:20 AM
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Black Onyx or Ford gaskets doesn't matter. If the job was done wrong, its going to fail. I know guys that have twin turbo kits on thier 6.0s with Black Onyx gaskets and sled pull with no issues. You cant beat a truck much more than that. Take it to the diesel shop and have them do it right.
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Old 12-23-2011, 10:29 AM
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yank the ehads, take them to a machine shop worth their salt, have them magnaflux and check the heads, repair as necessary, use oem gaskets, and bobs ur uncle
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Old 12-23-2011, 10:36 AM
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Quote:
Originally Posted by ianstew View Post
yank the ehads, take them to a machine shop worth their salt, have them magnaflux and check the heads, repair as necessary, use oem gaskets, and bobs ur uncle
bobs ur uncle?

Not sure what that means
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