RING GAP TOO LARGE? piston manufacturers when they supply rings will also give you a general guideline in which to check or set your ring gaps those are set forth to make sure you don’t have any problem as far as too tight of a gap unfortunately a lot of them end up having a gap that’s actually too large too large the gap will increase the crankcase pressure and can cause you know catch cans to fill up and if it’s on an extreme condition even pressurize the oil seals to have a continuous oil leak that is hard to find