Guide pins have a internal thread, can be removed by screwing in a bolt that has a nut run up enough to push against a stack of washers when tightened. Pin will be drawn out. Cam gear will pass thru head when on chain. I like leaving it on. The gear could come off on its own instead. No need to lock cam or injection pump. Cam and lifters are easy to remove, makes head lighter for removal. Vac pump pulls on chain, easy to remove. There are two small bolts that secure the head to timing cover.