How do replace the valve cover gasket on a 1991 Honda Accord Also how do you replace the distributor O-ring Any special tools?

To replace the valve cover gasket, remove the PVC valve and undue the spark plug wires (make sure you know which spark plug they go to) and remove the valve cover by loosening the accorn nuts. Your valve cover gasket kit should include new gaskeys for the spark plugs and the mounting holes. If you aren't replacing the distributor, you shouldn't need to mess with the O-ring. However, if you want to change it, you don't need any special tools. Just unplug the distributor wires (MAKE SURE YOU KNOW WHERE THEY GO!!) and then remove the distributor.