Mercury F8CZ-6K254-AA Tensioner - Timing Belt

It is only advisable to remove the tensioner as a step that goes hand in hand with the timing belt change, in this way, once the belt tension has been disrupted, the valve timing is correctly realigned. There is tensioner to be removed and checked and many professionals will advice that the tensioner assemblies be replaced as a whole whenever the timing belt is to be replaced. The only special operation, which is required after removing the old tensioner is the installation of the new tensioner. In the case of the camshaft and crankshaft sprockets, removal of any of the sprockets means that the belt tension has to be released and in the process the whole timing belt of the vehicle must be replaced to ensure correct the required valve timing. In the case of its removal, camshaft sprockets can be released from the place with the help of their retaining bolts once the timing belt is off; it is advisable to take some time and label the sprockets for orientation. The crankshaft sprocket can be pulled off by pulling on this bolt, recommended to remove the crankshaft pulley and timing belt with FRONT marking on the sprocket and paying attention to the installation direction of the thrust washer. The sprockets need to be inspected and installation process is the reversal of the removal process with tensioning of the timing belt. For the timing belt guide pulleys the upper guide pulley, one can get access by removing the upper and middle covers while the lower guide pulley, (for early models) will need access from the lower cover. The guide pulley bolt should be unbolted, and a lot of precaution is needed in order not to discard the timing belt from the sprockets. The condition of the pulley(s) should be inspected and many mechanics also suggest the guide pulley assembly should be replaced when doing a timing belt replacement. If the pulley bolts are removed then installation is the procedure followed whereby the bolts are tightened until they get to the correct torque setting.