It is however important to note that before disturbing the timing chain(s) from the sprocket(s) all the sprockets on the chain should be fitted with timing marks. In a car, it is necessary to rotate the engine as certain degrees just in order to match all these timing marks. This procedure requires three special tools to lock the camshafts on each cylinder head: tool numbers including EN48383-1, EN 48383-2 as well as EN 48383-3. Start by removing the cable from the negative terminal and also removing the cover of the timing chain. Bolt on the crankshaft pulley and turn the crankshaft clockwise until the mark on the primary timing chain sprocket lines up with the mark as shown on the oil pump housing in the 5 o'clock position for the stage one. Timing pointer position settings: if overhauling the right-side chain only, turn the timing mark to the 9 'clock position. Check to make sure that the flat segment on the rear of each camshaft on the left side cylinder head is up and parallel with the valve cover mating surface; if not turn the crankshaft clockwise 360 degrees and recheck the timing marks. Place the special tool to the left side camshafts Remove both timing chain tensioner bolts of the right side cylinder head, followed by removing the tensioner and discarding the gasket. Take off the right side cylinder head timing chain and its guides and do the same with the left side cylinder head. If so desired, undo the bolts that hold the idler sprockets and the sprockets in place. Fit identification marks on the camshaft sprockets and their respective camshafts, and while holding the camshaft correctly fitted, slacken and remove the camshaft sprocket bolt. Check for damages on timing chain cover, wash all related parts and ascertain that the guides/timing chain sprockets are worn out or damaged. Release the tension of the cables and thereafter make sure they remain in their position in case of any tension build up. The fact is that before starting the engine, the crankshaft should be turned by hand no less than two times checking its perspectively. Find the Woodruff key which fits onto the crankshaft and position it so that the planed crank face is adjacent to the cylinder head and indexed marks are easily seen. Insert the special retaining tool onto the left side camshafts, then place left side secondary chain over the sprocket on the gear, ordering the timing links. Go on and thread the chain over both of the camshaft actuator sprockets while maintaining the correct orientation. Finally fit the left side timing chain tensioner, timing chain guides and the similarly the right side timing chain idler and the primary timing chain must all be positioned in such a way that the timing mark lines up properly. Place the tensioner and compare the alignment marks on it. Turn the crankshaft to the nine position and fit the two special locking tools on the two cylinder heads. Subsequent to this, place the over head camshaft timing right-side timing chain in the right position at the camshaft sprockets and thereafter assemble the timing chain guides and the tensioner. Scrape off all the prior contour sealants from the block and the timing chain cover, besides that, take out all the special locking tools from the camshafts. The rest of the installation also works in the process of dismantling, step by step starting from the top part of the installation.
