Liberator Performance O-Ring Cylinder Heads - Ford Powerstroke Diesel Forum
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Old 01-21-2013, 07:57 PM
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Liberator Performance O-Ring Cylinder Heads

Looking for some reviews from people that have been running the Liberator Performance o-ring cylinder heads.

this is NOT a o-ring VS non o-ring cylinder head thread so please dont say one is better than another.

I am looking for real life experience with guys that have had good or bad experience with these heads.
  • What other mods do you have?
  • How many miles do you have on them?
  • What do you use the truck for? Daily Driver? Towing? Race truck? etc.
  • What issues if any have you had?

share you experience with them as a company as well as your overall review of the product.
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Old 01-22-2013, 05:37 AM
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I have a buddy who has a set on his 6.0, not this brand but they are oringed. Its been that way for 5 years now with no issues.
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Old 01-22-2013, 05:46 PM
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Not really recommend in daily drivers. messed with a few trucks
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Old 01-22-2013, 05:58 PM
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Quote:
Originally Posted by powerstrokedieself250 View Post
Not really recommend in daily drivers. messed with a few trucks
can you please explain why they are not recommended on daily driver trucks? please elaborate on your experiences thanks!
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Old 01-22-2013, 06:17 PM
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Quote:
Originally Posted by powerstrokedieself250 View Post
Not really recommend in daily drivers. messed with a few trucks
can you please explain why they are not recommended on daily driver trucks? please elaborate on your experiences thanks!
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Old 01-22-2013, 06:36 PM
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cant say much from experience but did a set on two trucks they have maybe 15k on them since havent had any issues dont need them unless going above 5 or 600 hp. i would personally stick with just studs and oem gasket. just read alot on them not being good for daily drivers because of the heat cycles
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Old 01-23-2013, 05:50 AM
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I think your confusing o-ringed and fire ringed together. Fire ring is not really recommended for a daily driver, however o-ringed heads are just fine for that purpose. O-ring is a thin piano wire type of ring that is pressed into a precut grove in the cylinder head, a fire ring is a thick ring that sits in a grove cut both in the head and the block. So the fire ring will sit 50% in the block grove and 50% in the head grove. Its great for race trucks that will see over 60 or more PSI of boost regularly. O-ring heads are good for about up to 60-65psi on a 6.0 and more on a 6.4 due to the increased clamp load and are perfectly fine for daily drivers.
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Old 01-23-2013, 07:21 AM
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Re: Liberator Performance O-Ring Cylinder Heads

If you search the forum you'll find a build thread by a guy with screen name Dansomething iirc who did a build of his own using these heads and had good things to say. This thread is years old so getting an update from him could be difficult.

Last edited by DoubleDpsd; 01-23-2013 at 07:28 AM.
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Old 01-23-2013, 07:40 AM
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So, aside from Liberator, who else does "O-ring" heads??
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Old 01-23-2013, 07:41 AM
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I have the liberator o ringed heads on my 05 harley edition f350. I use the truck as a daily driver and haven't had any issues. I bought the truck with a bad motor and had it gone through by a local shop that is well known for their performance work on diesels. They ordered the heads so I can't speak to customer service, but my shop spoke very highly of the heads themselves. Said that they can handle 50 PSI boost with no problem. I rarely get half that boost so I shouldn't need to worry. Again, I haven't had any issues with pulling an enclosed car trailer and using truck as a daily driver. Other mods that I have is an edge juice with att. 5" TB no can no kitty, bat mo wheel in the turbo, full bullet proofing with egr delete, s&b intake. I would think if you needed heads, go for it, if your heads are fine, just stud them.
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