In order to examine the timing chain, the first step sanctioned is the removal of the timing chain cover. If an engine has many miles on it, or if there is visible damage to the chain, or if the amount of freeplay beyond the two small pins that secure the chain exceeds one inch, then a new timing chain should be installed because as the chain wears, the engine will not idle smoothly, lose power, and experience decreased fuel efficiency, and the chain can 'jump' timing or break which will damage the engine. Loosen the tension of the timing chain cover and bolt down the vibration damper so that crankshaft is turned such that the arrow on the crankshaft sprocket aligns with the top and of the camshaft sprocket arrow should be resting at the bottom. To do so, undo the camshaft sprocket bolt with some measures and then with your hands cautiously push the camshaft sprocket from the dowel pin with the help of two big screwdrivers. Timing chains and sprockets should be replaced in sets: when installing a new timing chain, eliminate the crankshaft sprocket with the aid of a puller and install a new one, such that the key in the crankshaft fits into the keyway of the sprocket. Check timing chain dampener for signs of cracking and replace it, if required; use solvent to wash timing chain and sprockets and if possible blow them dry with compressed air. Zebras should be checked for signs of wear and damage, in particular, deformed, chipped, pitted or cracked teeth will be apparent here. For installation, bring the camshaft to bottom with the dowel pin, fix the timing chain with the camshaft sproket, engage the timing chain with the crank sprocket so that the marking touch each other. If the crankshaft to be disturbed, rotate it in the direction of arrow until the crankshaft sprocket arrow is pointing upward and if the camshaft is to be rotated temporarily fit the sprocket and rotate camshaft until the marking on the camshaft sprocket is at the bottom and arrow will point each other simultaneously the reference link mark of chain will be in time with the marks. Place the camshaft sprocket bolt and fasten it properly according to the indicated torque, with engine oil to lubricate the area for wear and tear on the chain and sprocket, put back the timing chain cover and do the rest of the assembling in the opposite manner to its removal.