I resently purcashed a 86 4runner and the engine is making some noise. I have look through this forum and it seems to be the timing chain due to the fact that it is making a noise like a diesel. It isnt very loud but it is definatly there. Is there a easy way to check for sure if it is the timing chain and if so how is this done? Apparently the previous owner changed the timing chain around 100,000mi and it is at 179,000 now.