Originally Posted by Stealthcruiser
For that particular keg, try putting a nickel under the feet of the bail, ( the doohickey that forces the keg lid up), or a thinner coin if needed, to see if it helps at lower pressures.
This seems like a good idea I can try for now. The O rings are brand new and I have noticed when I am trying to seat the lid under pressure I have to wiggle the lid around quite a bit until it seals good. Besides trying some keg lube or those other softer type of rings I'm sure what else I could do. If the keg can't hold even a low pressure then I can't fill any bottles using Biermuncher's technique!
This also worries me because I lager in my kegs and usually only initially hit them with gas to purge oxygen and seat the lid. I then take the keg off the gas to make room in the kegerator. I would assume that little bit of CO2 will eventually be absorbed into the lagering beer causing the psi to drop again and the lid to start leaking again.