Need to double-check to make sure my valve cover is torqued down properly.

1) What is the proper torque for the nuts on the valve cover, and

2) Should there really be crush washers under each of the nuts?! Don't think i have any and i seem to have read a post mentioning crush washers in that spot... if so, where to get 'em.

THx,

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1987 Mercedes 300SDL; SOLD
1985 Mercedes 300D; SOLD
2006 Honda Pilot - wife's ride; 122K;
1995 Toyota Land Cruiser - 3X locked; 182K