[Tigers] water neck - gasket vs o ring

[Tigerman]

I have used an aftermarket ford chrome water neck on my mustang before.  It 
came with an o ring and had a grove in the waterneck to accommodate the o 
ring.  The neck sealed fine, and it was a bit more convenient with the grove 
and o ring to install.  Without the grove, I could imagine an o ring would 
be tough to get centered correctly.  Maybe someone who has experience using 
an o ring on an original style water neck could comment.

I doubt you would want to use both, the gap between the oring and gasket 
would be subject to leaking easier than if you use just one of those.

Steve


> quick question - my water neck has a leak so i was just about to order
> a replacement gasket when i found that there is a choice between using
> either a gasket or a rubber o-ring.
>
> what is the preferred choice?  is it possible to use both?