blackta97

What does everyone think about using these? I haven't been able to find too much about them, but how about some personal experience. I'm putting my motor back together and I'm thinking about putting some in for added insurance.

robsquikz28

iTrader: (246)

Every gm engine rebuild or new engine has them installed before it leaves the dealership

shbox

A tight cooling system should not need anything extra. MHO.

93M6Formula

what are these exactly? Never heard of them.

Mystery Bird

iTrader: (7)

I heard this too many years ago. I believe it's crushed walnut shells?

Z8'S

iTrader: (6)

I use it with every build.

speed_demon24

iTrader: (6)

They came with my heads so I threw them in.

gregrob

iTrader: (8)

I use them to help seal head studs

lt1slowz28

GM used them for a long while and was a "miracle cure" for the northstar's head gasket/coolant issues.



I've used them before, work pretty good, but if you use too much your coolant will look like mud. (more so than just one or two being in there)


GM claims the walnut shells clean parts. Kind of like media blasting as they often used walnut shells on more delicate work. As well as it is claimed to plug up minor leaks (and it does).




All depends on your preference if you want to use them or not, but don't think a band aid will stop a gunshot wound from bleeding.