According to Mitchells, which is a repair/price book, I found the following:
I'm assuming you mean valve cover gaskets?
2.2 hours labor for both sides
around $22 for each gasket
1.0 hour labor
could be up to $11 for each plug
1.1 hours labor to replace them all or .8 for one
around $82 each.
This is a rough estimate. Depending on what the shop is charging for labor, this could cost around $1,100 or more for everything. Hope this helps.
〉 Answered on Dec 22nd, 2007 by Lori Johnson, Owner and Instructor at Ladies Start Your Engines