Pic. 2.25. Timing mechanism drive chain: 1 - camshaft sprocket; 2 - tensioner lever; 3 - chain tensioner; 4 - chain guide; 5 - crankshaft sprocket; 6 - timing chain drive; 7 - step size; 8 - step; 9 - communication
Engine oil inside the engine front cover lubricates the timing chain and sprocket. Timing chain pins nitrided for increased abrasion resistance (pic. 2.25).