Are these new or old style head gaskets?

thunder550

Active member
Apr 2, 2013
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Phoenix, AZ
Can anyone confirm if these are the new or old style LLY head gaskets?

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delong_1

<< my work
Dec 5, 2008
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Arvada, CO
Those are the same pos gaskets I had issues with. Supposedly those were the lml style. Now they are back to the gaskets that are fully covered in the black sealer
 

schulte

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Jul 31, 2010
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The "old" LLY head gaskets had crimps instead of rivets.

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duratothemax

<--- slippery roads
Aug 28, 2006
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Wyoming
I havent heard anything bad about the LML gaskets...I believe Mark Broviak said he uses them and they work just as well as the older riveted style.
 

malibu795

misspeelleerr
Apr 28, 2007
8,235
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in the buckeye state
Why not?
Too me just a ease of mind.
Especially when OEM specs a warpage limit on the heads. While I couldn't put a .001" gauge under a straight marble edge that's 12" long on my head.. That doesn't mean the head isn't "wrapped" per OEM specs

Short answer. Avg milling doesn't even come close to roughest part of an RHR chart
 
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butch2000

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Jun 19, 2012
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another more helpfull forum
If the head and block and prepped correctly there should be no need for the spray sealer , I could see how that may contribute to a failure if surface prep is under pare ?
I used felpro HG gaskets in my 2005 Viper and they call for no spray sealer ? leaked like a bitch , they covered another set , but I followed the manufacture directions and sprayed them , and no problem after . I do not see anywhere that GM recommends spraying them ? so I think it would be a personnel experience thing , but if guys are running 700 + plus horse power on stock GM gaskets in stalled dry I see no use for the spray either ? just my opinion ,
 

schulte

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Jul 31, 2010
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If a gasket is designed and tested to seal given a set of prep instructions, and they commonly have no issues when installed that way, I see no reason to spray. At that point, it's either unnecessary or actually going to hurt sealing.

These aren't old school asbestos/paper layered gaskets that need copper. With multi layer stainless steel gaskets, spraying something between the gasket and the block/head can hinder sealing... the coatings are designed to be on bare metal.