Upon covering a distance of more than eighty thousand miles, visible damage inflicted on the chain, or when total free play exceeds one inch midpoint between sprockets there should be replacement of the timing chain. It is important to replace a worn-out timing chain so that it doesn't lead to irregular engine functioning, loss of power and low fuel efficiency. Timing errors can happen if chains become loose. In some cases when the chain jumps time or breaks down, the consequences could be disastrous for your engine. Now remove the timing chain cover as well. For a short while screw in place the vibration damper bolt and turn the crankshaft with its help until the timing marks on both sprockets on crankshaft and camshaft line up. Both should be at twelve o'clock positon. Then proceed to removing camshaft sprocket bolts without making any attempt to turn camshaft in this process. Use two large screwdrivers to carefully pry off camshaft sprocket from camshaft dowel pin Slip timing chain and the camshaft sprocket off the engine. Timing chains and sprockets are sold as sets only. If you want to use a new timing chain, remove it with a puller but do not forget to replace the crankshaft sprocket with a new one. While installing line up key in crankshaft with keyway in sprocket. The guide-timing chain dampener-area needs inspection for cracks and wear; if necessary replace it (it is held onto engine block by two bolts). Clean them using solvent and blow dry them using compressed air if possible . Check these parts for wear or/and damage such as deformed teeth, chips, pits, cracks etc. Cam shaft needs turning until dowel pin reaches 9 o'clock position then meshing of timing chain hoop over cam shaft sprocket followed by engagement onto crank shaft sprocket where timing marks are supposed to be aligned. Tighten camshaft sprocket bolts. Coat the chain and sprocket with clean engine oil. Now install the timing chain cover. The remaining steps for installation are just the opposite of removal.