Originally Posted by
athomas
Check to see if your rail bushing is in place. yes
When it is leaking, can you stop the leak or slow it a bit by pushing back on the tip of the bolt. No- see below
Also, if you use a carrier size that is too tight, the leak might not go away, because the tight fit of the bolt stem pushes the oring back rather than allowing the bolt stem to fully move the vent hole past the oring. retuned it from scratch
Check the sear for wear. A worn sear will allow the bolt to sit too far forward. Brand new sear because old one snapped in half after 7 years
Check your bolt stem to see if it hasn't come loose. They are press fit, but sometimes come apart. This is rare but has come up a few times recently. no but good to know thats a thing
Are you sure the leak is the powertube and not a leak in the chamber where the powertube screws onto the valve body, or a leak between the front and back half of the valve.