I removed the valve covers and upper timing covers. Not too difficult. My engine internals and timing system look great. The timing chain is tight with hardly any slack even with the tensioners not being fed oil pressure. The timing chain guides are not broken from what I tell up top.
The only issue I noticed is that my engine look like it may have the start(weeping) of a upper timing cover leak on the driver side. Not bad for a 90k engine made by Hyundai. The Tau engine reminds me of a Toyota V8 at this mileage. It has some minor seepage but no actual oil leaks. I usually do not do perform work like this on engines until after 200k miles, but it is what it is.
The valve covers and upper timing covers removed. Both are held by only 10mm bolts and some RTV. Note: You must remove the (2)VVT solenoids on each upper timing cover before you can remove the covers off the heads. The solenoids are each only held by (1)10mm bolt. You can use a hose puller to pull them out the recessed hole.
The engine looks clean. 4k mile oil changes seem to be working on this engine to keep it looking new on the inside. Timing chain is tight.