As I know a few of you guys tackle changing your chain guides at the moment,here are some useful hints:
To make sure there is no oil leaks between upper chain covers(and lower chain cover) where they meet the block and head gaskets as well as upper oil pan gasket I apply a bit RTV(in my case Drei Bond) as shown on the picture.
Also a bit silicone on all steel gaskets for lower,upper chain covers,water pump,valve cover gaskets.
To prevent the main chain from slipping hang it up like this:
Secure the wiring loom with a zip tie on the oil return tube:
Clean the threads for the inhex bolts on the cams with brake cleaner and use Loctite 270(strong) for the bolts.
Clean the threads for the sprocket hex bolts and use on the new bolts(as they come as 10.9 instead of 8.8 original).
If you install the chain drive first and then the covers,use a zip tie as shown.Makes installing the lower chain cover easier.
Remember to remove it before installing upper chain cover.
When installing the upper chain covers,tighten the cylinder head side bolts only a bit.Then tighten the bolts lower chain case side most outwards first.After that the rest of the bolts.
This way the covers seat proper.
Pushing the chain tensioner rail with a screw driver makes installing the bank1 upper cover easier: