Cometic Head Gaskets
Posted: Sun Mar 08, 2020 3:46 pm
I have a big valve head that has had, historically, 39 thou removed from the head face. (I have a head depth measurement of 4.564") On engine disassembly it appears to have been assembled using a standard gasket.
Available machining data quotes 0.010" being the limit that can be removed from a big valve head, so I am looking at "making up" 0.029"
I am leaning toward Cometic head gaskets but I am having difficultly in understanding how they are sized.
For example is a 0.030" Cometic multi shim gasket 0.030" thick or does it act as a shim, (as the description suggests), and is therefore 0.030" thicker than a standard gasket?
.
Available machining data quotes 0.010" being the limit that can be removed from a big valve head, so I am looking at "making up" 0.029"
I am leaning toward Cometic head gaskets but I am having difficultly in understanding how they are sized.
For example is a 0.030" Cometic multi shim gasket 0.030" thick or does it act as a shim, (as the description suggests), and is therefore 0.030" thicker than a standard gasket?
.