LB7: Head Gasket Choice

[farmer]

Is my only choice for head gaskets OEM?

The block will be bored .020 over. Deck will not be milled. Heads had .006 taken off to clean and flatten. Pistons have just the lip cut off than coated.

Does it matter what my original head gaskets were, i.e. A B C?

Is my only option the bored over thick gasket? No one makes a .020 over C or a little fatter?

Thanks

Matt

 

[malibu795]

run "C"

 

[duratothemax]

Im running C

 

[sweetdiesel]

There is 5 choices from GM
and DPR makes a gasket now

 

[sweetdiesel]

Is my only option the bored over thick gasket? No one makes a .020 over C or a little fatter?

Thanks

Matt

GM does

 

[farmer]

GM does

Yeah but, I thought that was a .030 over gasket??

So, a C will work with a .020 over block?

 

[codyn]

they make a overbore gasket if your .20 over go with that one
check part number 97358465 97358466. they are the ones i used for my motor and mine is bored 20 over

 

[Trippin]

The dealer has 5 choices.

Cometic is the only aftermarket head gasket that I know of, Merchant tried them on 9 different trucks and I tried a set on my personal truck and every one leaked water.

So we went back to stock.

Currently I use/recommend the "milled deck, overbore gasket".

 

[mytmousemalibu]

Wonder if SCE could do up some of there Titan copper ones with the silicone seal beads on it?

Hussey copper custom made the gaskets for our ARIAS hemi to spec and thickness but theres no bead seal and its a dry block (no cooling, solid alum), dunno if the can do the seal bead or not but if they can, im sure they could cut a d-max head gasket! Sealing up a copper gasket is always an issue so an MLS gasket is prolly best bet, surprised the Cometic ones suck! Fel-Pro has MLS gaskets now too, wonder if they might have a
D-max gasket soon?

 

[duratothemax]

high temp RTV?

 

[Turbo Buick 6]

The dealer has 5 choices.

Cometic is the only aftermarket head gasket that I know of, Merchant tried them on 9 different trucks and I tried a set on my personal truck and every one leaked water.

So we went back to stock.

Currently I use/recommend the "milled deck, overbore gasket".

They are known for doing the same thing on Buicks. I just threw a couple of GM coolant tablets in and it seals right up. Leaked every time I put them on and stopped every time with a few of those tablets. Don't know if it would work on a D-Max but sounds like its worth a try.

 

[Turbo Buick 6]

Wonder if SCE could do up some of there Titan copper ones with the silicone seal beads on it?

Everyone that I know that has run these has hated them and has gone back with something else. Usually a lockwire felpro.

 

[farmer]

Okay.

Is this the correct part # for fat C .030 over milled deck?

97358467
97358468

 

[codyn]

Okay.

Is this the correct part # for fat C .030 over milled deck?

97358467
97358468

97358465
97358466
are the correct ones

 

[farmer]

crud your right, I was looking at the wrong line..

 

[dmaxlover]

97358465
97358466
are the correct ones

What is the compressed thickness of these gaskets?

Which part# corresponds with each side of the engine?

 

[jneal]

Block Over-Bored .030" and Deck Milled .008" - The thickest OEM Dmax gasket, .010" thicker than a C.

97358466 Left
97358465 Right


Compressed thickness = 0.0492in-0.0532in


Hope this helps

 

[dmaxlover]

Block Over-Bored .030" and Deck Milled .008" - The thickest OEM Dmax gasket, .010" thicker than a C.

97358466 Left
97358465 Right


Compressed thickness = 0.0492in-0.0532in


Hope this helps

Thank you very much!