Basically I can't keep the 3 bolts attaching the head pipe to the exhaust manifold. The manual calls out for the bolts to be torques to 14.5 ft-lbs with loctite. That lasts about 10 minutes.
So I originally torqued them more and that lasted a bit longer but no good. I ended up stripping the manifold on one hole and stepped up the bolt size to 7/16" and retapped the manifold for all three. Using generic torque values for the new bolt has allowed me to step up the torque quite a bit and the bolts still rattle out. I've tried many other things including lock washers but right now I'm up to using lock washers and JB weld on the threads and it's lasting about an hour before the bolts back out.
What else can I possibly do to keep these bolts in place? I'm running out of ideas here. About the only thing left I can think of is ordering special bolts and drilling the pipe and manifold to fit a cotter pin. That or weld the pipe the manifold.
So I originally torqued them more and that lasted a bit longer but no good. I ended up stripping the manifold on one hole and stepped up the bolt size to 7/16" and retapped the manifold for all three. Using generic torque values for the new bolt has allowed me to step up the torque quite a bit and the bolts still rattle out. I've tried many other things including lock washers but right now I'm up to using lock washers and JB weld on the threads and it's lasting about an hour before the bolts back out.
What else can I possibly do to keep these bolts in place? I'm running out of ideas here. About the only thing left I can think of is ordering special bolts and drilling the pipe and manifold to fit a cotter pin. That or weld the pipe the manifold.