Mr. Gasket makes some sorta special, thicker ones that are supposed to seal once the motor runs. I've got them on mine, with no leaks. I can't remember the part number, but they are in the Summit Racing catalog, and on their website. Read the descriptions, and you'll know right away which ones they are. Sean Akron Don wrote: > > I've got both stamped valve covers leaking on my 440. Just how does one > > go about getting them to stop leaking? It looks like double gasket will > > work but that's kinda chicken poop way to do it. ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.