I dont know how you should measure head gasket thickness, but i made my own notification today. I bolted down my heads and see measurable gap between block and a head. I measure it with the feeler gauge and i end up measuring 1,25mm so it is ,049". Advertised thickness is .054" Is there multiple variations to choose in gasket thickness, or am i doing it wrong way? At least i have real world measurement now, when its torqued down in my engine.

For me really it does not matter with thickness in my build, but its fun to notice.

 

iirc compressed thickness of a gm mls is .051 which is oretty damn close to .049 the .054 thickness is before torquing

 

Usually gaskets are informed in compressed thickness. No one cares about the thickness when they are sitting in shelf.

 

obviously some people do as I have seen both listed but anyway here is some info. they are indeed around .048-.051 compressed.
https://ls1tech.com/forums/generatio...ss-anyone.html

BTW I found that in 5 seconds with a search. try that next time

 

Thanks redbird for that link. I found same thread earlier when i did searching. In that thread is truth also, but i find it very confusing when almost every other replyier is saying or guessing different thickness. Didnt know where to trust when even my advertised thickness was .054"

I measured mine .049" and now its easy to believe its in range .048"-.051"

Hope some other curious find this thread among the other linked thread.

End of story.