Has a cup winning team ever gone to 7 games every single round?

Not that I know of. Mike Green actually said recently "almost all" past Stanley Cup champions have swept a series or won one in five. I don't know if that's true, but I'm fairly certain no team has won the Cup with a 16-12 record (correct me if I'm wrong).

Edit: I think this confirms it: the most games played in one postseason is 26, which is less than 28 games needed for a team to win the Cup that wins all its playoff series 4-3.

Philadelphia Flyers, 1987. Won 4-2 against NY Rangers, 4-3 against NY Islanders, 4-2 against Montreal, and lost 4-3 against Edmonton in the SCF.

Actually no!

You would think that over the course of more than 90 years some team should have played the maximum number of games and won but there's still not a single team that have done that! Infact no team has ever even played the maximum of 28 games! Maybe this year!?

I researched this once and discovered no team has won the subsequent series after winning two consecutive 7-game series.

That sure would cause a Cup hangover! No is correct.

no and it won't happen this year since the Caps are gonna sweep the Habs first round!