My VR has done 88,000 miles, didn't get any history with the car so i don't know if its ever had anything replaced on the engine, a lot of people say the chains almost never need replacing and other people say they do, i'm a bit confused as to what will need replacing or not on the engine? It seems to be running fine and sounds quiet and smooth i just want to know any precautions to take with it? Things to check or replace, i plan to do an oil change soon and new spark plugs, oil filter. Its a 1994 2.8 VR6. Thanks in advance