Tightening Head Nuts on 2.0 Heads, Why won't some snug up? Options

[phantom914]

I am reassembling a stock 2.0 but it seems that no matter how many times I re-check with the torque wrench, some of the nuts on the head studs still turn a little bit every time while others hold steady after their first torque to 23 ft-lbs.

I torqued in the correct sequence as recommented in the Wilson rebuild book. But, as I said, when I let the engine sit and then go back and re-check, some of those damn nuts turn slightly.

I finally pulled a head and cylinders off and removed the studs. The threads in the case appear normal, with nice, sharp threads, so I don't think the studs are pulling out, or can one tell just by looking? . Also, it seems that some of the long studs are doing this, but not the shorter top studs. What could be going on? I can't imagine that the studs are stretching.

Should I just duct tape the heads on? Glue? Chewing gum?



Andrew