Two of the studs that hold the valve cover of my 92 Accord is broken due to overtightening for a seal job that I had it done 15K kms ago. I am really considering it to do it myself this time because obviously paying for a professional does not always get it done right. How an easy job is it for a DIY?. I have the electronic version of the Service Manual but I could not find the information. Are these studs a dealer item? Thanks.