noclue02

Hi all, my car is about to hit 100k miles within this month and wondering what I should be doing for maintenance? It is a 2016 4cyl. The engine vibration is more than before, and turning the wheel doesn't stop the vibration like before. I changed the sparkplugs and coolant around 70k, and oil changed every 5k. My main concern is the timing chain and the tensioner. How do I check if the chain is still in good shape without pulling out the pulley and or the timing cover? The engine oil get replace every 5k but it does burn oil so i have to add a full quart around 3.5k.