Had questions a month or so ago about exhaust flange gaskets for my 84GL
Vanagon.  Now I have a question about torque (14 foot pounds) on the bolts
and nuts.  Before I remove the pipes, I rechecked the torque on the flange
bolts and nuts.  Found at least 2 bolts and one nut that could be retorqued.
One was leaking air and the other flange was not.  Question--Should the
flange bolts/nuts be retorqued and if so, how often should they be checked?

William