ADJUSTING VALVES / replacing valve cover gaskets on a 12 valve Dodge Cummins / finding the oil leak!

So my Cummins has been leaking a little oil for years, & started getting worse a few months ago. Looking around, I found oil sludge around the valve cover gaskets. They were def due to be replaced.
It's been awhile since the valves have been adjusted too, so while I have them off I might as well adjust the valves, killing 2 birds with 1 stone.
Here's how you do it.
Link to valve cover gaskets- https://www.amazon.com/gp/product/B000C2GIL6?ie=UTF8&tag=smittysyoutub-20&camp=1789&linkCode=xm2&creativeASIN=B000C2GIL6
Link to torque wrench- https://www.amazon.com/gp/product/B07SQM2RQR?ie=UTF8&tag=smittysyoutub-20&camp=1789&linkCode=xm2&creativeASIN=B07SQM2RQR
Link to feeler gauges- https://www.amazon.com/gp/product/B087CB33J3?ie=UTF8&tag=smittysyoutub-20&camp=1789&linkCode=xm2&creativeASIN=B087CB33J3

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