So I'm curious as to what people use to seal the manifold bolt threads. I know some use RTV. In the past I have used ARP thread sealer (white). When removing the manifold this time I noticed the bolts had loosened to about 3ft/lbs. When I installed the manifold last spring I followed the recommended torque procedure and torqued the bolts to about 17lbs. I retorqued them several times including a retorque the following day. Perhaps the thread sealer is the cause? Maybe I used too much? Maybe the heat cycles loosened the bolts over the course of a season?