5.9L 12V Performance Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps Related to Performance and Longevity

Which gasket for O-ringing head?

Old Jan 26, 2010 | 01:48 PM
  #1  
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Default Which gasket for O-ringing head?

I'm getting ready to tear down my 2nd gen 12v and get the head O-ringed. Thinking I was thinking ahead, I ordered the studs and a replacement STOCK head gasket. I was under the impression that O-ringing used stock gaskets and fire-ringing used modified gaskets. Weeeeeeeell, then I open up my new Diesel Power mag this afternoon and see that they O-ringed the Rust Busket and used a .020 over gasket.

So, question is, do I need the oversized gasket, or can a stocker be used?

Being that I only have a few days I can get off to get this done, I'd like to have all the parts ready before the head gets back...
 
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Old Jan 26, 2010 | 04:13 PM
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94 12valve's Avatar
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I'm pretty sure you can use a stock gasket ... and which diesel power did they o ring rust bucket? hope I didnt miss one.
 
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Old Jan 26, 2010 | 04:26 PM
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Yeah...looks like I might not O-ring the head anyway. Turns out none of the nearby shops do O-ringing, just fire-ringing.

As for Rust Bucket, March 2010 Issue...just got it in the mail today.
 
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Old Jan 26, 2010 | 05:05 PM
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Yeah, you can use the stock head gasket. The .020" larger one is referring to the thickness, which will lower compression a little bit.
 
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Old Jan 26, 2010 | 05:32 PM
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I have a stock gasket in mine.
 
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Old Jan 26, 2010 | 06:18 PM
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you only use the .20 gasket if u have the head milled
 
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Old Jan 26, 2010 | 11:43 PM
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You can use the thicker gasket if you want to drop the compression a touch.
 
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Old Jan 27, 2010 | 09:52 AM
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Alot depends on how much they took off of the head when they milled it.

Many will run a .010 or a .020 marine gasket instead of a stock gasket.Again it depends on how much of the head was milled to make it flat.

On mine I run a .020 marine gasket becuase of what was taken off of my head and I want the compression lowered a tad for higher boost levels.
 
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Old Jan 27, 2010 | 10:08 AM
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Okay, so I'm still sitting pretty if I do happen to find a place to do the O-rings.

Thanks guys!
 
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Old Jan 27, 2010 | 12:19 PM
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ive talked to a few guys that put a thicker gasket on to lower compression and they smoke at an idle bc of it
 
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