[Jamesp]

One other item, don't decide to just pop off the valve covers, you can break your camshafts.

Crazy as it sounds the valve covers are half valve cover/half camshaft journal. The valve covers hold only the end of the camshaft opposite the chain sprocket down. You need a special tool to hold that end of the camshaft down while you take off the valve cover or the valve springs will try to snap the camshaft in two.

There are additional bearing journals under the valve cover that are not part of the valve cover that hold the chain driven end of the camshaft to the head. If you remove the valve cover without the special tool holding the "free end" of the camshaft against the valve springs tension, they will try to snap the camshaft in two.

This engine can be a bit of a minefield to work on.