Its wise to replace any SOFT seals (coolant orings, dowel pin orings, etc) while it's open. Yours sounds like it was just put together not too far back, so you *might* get away with it... but I personally wouldnt' chance it. Especially considering that a 12A gasket set is CHEAP @ Atkins Rotary - Rx7 | Rx8 | Mazda | Rotary | Engine | Parts, I want to say like $250, only