O-ringing is too risky as there are exact specs (depth, wire gauge, positioning, etc).... should ONLY then be used with a soft copper flat gasket... and further risk fluid leakage (flat copper does not seal well).

The modern Fel-Pro wire-ring gaskets have the wire-ring pre-installed with a stainless steel wrap-around armor... typical diesel design... bullet proof!

Mopar Mitch "Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers! Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!