Head bolt torque caps went ping

[Eddie46]

Started engine and oil leaking from head caps. Talked to lm and he told me about the special copper washers. Found 4 copper washers and put them on 4 outer corners and leak really slowed down. Warmed up engine and started to torque caps to 25#, they went so far (18#) approx and heard a pink and the rod is now a spring loaded tortion rod and will no longer tighten. Should I unscrew and add filler washers or what? Thanks for help.

Ed

[Eddie46]

Finally had balls enough to try again. Put regular socket wrench on nuts and they were tight. Fired up engine and no more oil leak.

Ed