Mercury F6AZ-6L266-CA Tensioner - Timing Chain

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The crankshaft or the camshafts cannot be rotated at any one time once the timing chain(s) have been removed as this will lead to serious damages to the valves and or the piston; there are special tools used to immobilize the camshafts during the removal of timing chains and it is always advisable to read through the entire procedure and ensure that all the required tools have been acquired. Due to it being an interference engine design, when a chain breaks, valves or pistons will be damaged and the cylinder head will have to be taken off. The timing system is quite intricate and mistakes made are can lead to heavey losses to the engine thus only professionals should attempt this process and all the work done should be cross--checked before starting the engine. It is done by pulling out the negative cable of the battery, setting the number one cylinder to TDC and then, the spark plugs are pulled out. Secondly, the valve covers, as well as the timing chain cover should be detached, and attention should be paid to the fact that there are two lengthy timing chains between the crankshaft and the camshafts. Crankshaft position sensor toothed-wheel must be unclamped and then retrieved gently to avoid damage otherwise when replacing the spur, it must be ensured that it is placed in the correct orientation. Fit in the camshaft and crankshaft retaining tools such that the camshafts cannot move as a result of pressures from the valve springs. When positioning the engine at TDC, lock the keyways on the camshaft sprockets to be at right angles with the valve cover mounting surface. For specific engine types camshaft retaining tools must be fitted and the camshaft(s) must only be retained at exactly TDC as any error can lead to severe engine damage. Rotate the crankshaft groove to 12:00 for 5.4L 3V engines and also there is a valve spring depressor tool been used to take off the rocker arms into their corresponding camshaft lobe positions. The tensioners should be removed and the chains lifted off the camshaft sprockets with the timing marks observed with the intention of being realigned in the correct manner. Remove crankshaft sprockets at both ends, and if necessary, lock crankshaft in position before removal; also both chain guides should be unbolted and removed if required too. Check sprocket teeth, chain and guide for wears and tears and replace them with new ones if they are badly worn. Early-style tensioners should be tested for operation and the presence of the oil feed hole should be ascertained, whereas later-style tensioners should have their seals intact and the plungers should move freely. In installation perform a manual rotation of the crankshaft up to two full turns to evaluate the resistance in the crankshaft which is suggestive of a problem. Place fixed chain guides, crankshaft sprockets and timing chains: the bright faces of the links engaged with the marks on the sprockets. To individual types of engines, it is necessary to complete such procedures as the installation of camshaft sprockets, timing chains, and tensioners with attention to the relative positioning of the timing marks. Last of all, take out any retaining tool, replace rocker arm if any before fully engaging the crankshaft to ensure the right assembly so as to end the process of the installation.

To take off the timing chain(s), just disconnect the negative battery cable, and place the number one cylinder at TDC. Remove parts to access the timing chain cover then, detach the cover together with camshaft roller followers. Use camshaft holding tools to prevent movement. Then remove the right side timing chain tensioner, followed by the right timing chain and stationary guide. Repeat for the left side teeth, guides, chains keys wear or damage replace any defective parts. After that, you should inspect the tensioner operation and oil feed too as well tooth condition of the sprocket. However, this is only applicable when installing install stationary chain guides during installation and aligning crankshaft sprockets properly. The left time chain should be installed on the camshaft sprocket while aligning the bright link with the dimple then loop it under the crankshaft sprocket. Also, you should line up timing marks and repeat for the right side of the engine vehicle.

One has to be very careful, as the crankshaft or camshafts cannot be turned with the timing chain(s) removed; this will result in damage to the valves or pistons. Special tools are required to immobilize the camshafts during this process. This is not a "freewheeling" type of engine, so if it has "jumped time," there will always be a need to strip the cylinder heads. The timing system is very elaborate, and it is easy for severe damage to occur on the engine. Only experts should operate on this, and all work should be rechecked before engaging the engine.Begin by disconnecting the negative battery terminal. Then, remove the rocker arms in two stages: first, preload the valve springs on cylinders selected for testing, then rotate the engine 360 degrees to remove the rocker arms from the remaining cylinders, making sure to label and store all parts. Next, remove the timing chain cover and the crankshaft position sensor toothed wheel, observing the word "rear" stamped for proper replacement.When replacing the timing belt, attach the correct camshaft holding tools to ensure the camshaft(s) remain at TDC, preventing interference with valve timing. Move on to the right and left side timing chain tensioners, chains, and stationary guides. Mark these for reassembly as needed. Check for abrasion, cracks, or other forms of damage, and replace any worn parts. Additionally, test the tensioner.To do a preliminary check on the crankshaft, turn the engine with the starter motor or by hand for at least two complete revolutions, feeling for resistance. Mount the stationary chain guides and crankshaft sprockets in their respective positions, and fit the timing chains to match the bright links, dimples, and timing marks.The timing chain tensioner and guide should be bolted with the tensioner locked in a retracted position, then the bolts tightened before the lock is removed. Finally, compare the location of all timing marks while rotating the crankshaft back to TDC, and complete the process by reversing the steps followed during removal.

One has to be very careful, as the crankshaft or camshafts cannot be turned with the timing chain(s) removed; this will result in damage to the valves or pistons. Special tools are required to immobilize the camshafts during this process. This is not a "freewheeling" type of engine, so if it has "jumped time," there will always be a need to strip the cylinder heads. The timing system is very elaborate, and it is easy for severe damage to occur on the engine. Only experts should operate on this, and all work should be rechecked before engaging the engine.Begin by disconnecting the negative battery terminal. Then, remove the rocker arms in two stages: first, preload the valve springs on cylinders selected for testing, then rotate the engine 360 degrees to remove the rocker arms from the remaining cylinders, making sure to label and store all parts. Next, remove the timing chain cover and the crankshaft position sensor toothed wheel, observing the word "rear" stamped for proper replacement.When replacing the timing belt, attach the correct camshaft holding tools to ensure the camshaft(s) remain at TDC, preventing interference with valve timing. Move on to the right and left side timing chain tensioners, chains, and stationary guides. Mark these for reassembly as needed. Check for abrasion, cracks, or other forms of damage, and replace any worn parts. Additionally, test the tensioner.To do a preliminary check on the crankshaft, turn the engine with the starter motor or by hand for at least two complete revolutions, feeling for resistance. Mount the stationary chain guides and crankshaft sprockets in their respective positions, and fit the timing chains to match the bright links, dimples, and timing marks.The timing chain tensioner and guide should be bolted with the tensioner locked in a retracted position, then the bolts tightened before the lock is removed. Finally, compare the location of all timing marks while rotating the crankshaft back to TDC, and complete the process by reversing the steps followed during removal.

The crankshaft or the camshafts cannot be rotated at any one time once the timing chain(s) have been removed as this will lead to serious damages to the valves and or the piston; there are special tools used to immobilize the camshafts during the removal of timing chains and it is always advisable to read through the entire procedure and ensure that all the required tools have been acquired. Due to it being an interference engine design, when a chain breaks, valves or pistons will be damaged and the cylinder head will have to be taken off. The timing system is quite intricate and mistakes made are can lead to heavey losses to the engine thus only professionals should attempt this process and all the work done should be cross--checked before starting the engine. It is done by pulling out the negative cable of the battery, setting the number one cylinder to TDC and then, the spark plugs are pulled out. Secondly, the valve covers, as well as the timing chain cover should be detached, and attention should be paid to the fact that there are two lengthy timing chains between the crankshaft and the camshafts. Crankshaft position sensor toothed-wheel must be unclamped and then retrieved gently to avoid damage otherwise when replacing the spur, it must be ensured that it is placed in the correct orientation. Fit in the camshaft and crankshaft retaining tools such that the camshafts cannot move as a result of pressures from the valve springs. When positioning the engine at TDC, lock the keyways on the camshaft sprockets to be at right angles with the valve cover mounting surface. For specific engine types camshaft retaining tools must be fitted and the camshaft(s) must only be retained at exactly TDC as any error can lead to severe engine damage. Rotate the crankshaft groove to 12:00 for 5.4L 3V engines and also there is a valve spring depressor tool been used to take off the rocker arms into their corresponding camshaft lobe positions. The tensioners should be removed and the chains lifted off the camshaft sprockets with the timing marks observed with the intention of being realigned in the correct manner. Remove crankshaft sprockets at both ends, and if necessary, lock crankshaft in position before removal; also both chain guides should be unbolted and removed if required too. Check sprocket teeth, chain and guide for wears and tears and replace them with new ones if they are badly worn. Early-style tensioners should be tested for operation and the presence of the oil feed hole should be ascertained, whereas later-style tensioners should have their seals intact and the plungers should move freely. In installation perform a manual rotation of the crankshaft up to two full turns to evaluate the resistance in the crankshaft which is suggestive of a problem. Place fixed chain guides, crankshaft sprockets and timing chains: the bright faces of the links engaged with the marks on the sprockets. To individual types of engines, it is necessary to complete such procedures as the installation of camshaft sprockets, timing chains, and tensioners with attention to the relative positioning of the timing marks. Last of all, take out any retaining tool, replace rocker arm if any before fully engaging the crankshaft to ensure the right assembly so as to end the process of the installation.

THIS IS LEFT SIDE ONLY

No, a gasket is not needed