Originally Posted by skepace
Tried the coin thing. Still bubbles from the lid. Could it be the keg?
Possibly. Can you feel any nicks or dings where the o-ring seats on either the keg or the lid? Have you tried flipping the lid around so that the PRV is on the other side? Sometimes that can be finicky and only seat properly in one particular orientation.
Are the plastic tips missing from the lid clamp feet? If so, you'll need more than one coin. You can also use some pliers and a set of vice grips to bend the feet back straight instead of using coins.