Do i have to take off the back casing of the timing chain to pull the valve covers? If i do is it hard to do? i got the outside cover off so far and have not took any cams gears or the chain off yeat but looking to doing it tomorrow. Also if you have any secrets or info about taking the timing chain tensioner off that would be nice to im not sure if it just springs out super far or what? Well any help or suggestions would be greatly appreciated, thanks guys!