Ford XL1Z-6L266-AA Tensioner - Timing Chain

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It is very important not to rotate the crankshaft or camshafts after the timing chain(s) have been removed due to the possibility of harming the valves or pistons - special tools are required to lock the camshafts during removal. Start by using the number one cylinder with Top Dead Center and then pulling the spark plug and also taking out the negative cable from the battery. Next, the engine cooling fan should be removed as well as in certain models, the radiator should be taken off as well. Move on and remove the valve covers, drain the engine oil as well as take off the crankshaft pulley. Some models require also the removal of the water pump and its pulley, power steering pump, drivebelt tensioner, and idler pulleys. Remove camshaft and crankshaft position sensor connectors if necessary, and remove the air conditioning compressor without disconnecting refrigerant connections. Check all the connectors and brackets on the harnesses, and then undo the nuts and bolts that hold the timing cover and the cover away making sure that you do not use over torque. Take off the timing cover gasket and dowel pins, then timing chains between the crankshaft and the camshafts. For 1999 through 2004 two-valve engines, fit the camshaft and crankshaft retaining tools, to lock the camshafts at the TDC and protect them from being damaged. Take off the right and left timing chain tensioners and stationary guides, and if it is necessary - the camshaft sprockets. In 2005 and later three-valve models, the engine needs to be rotated to its proper position and the camshaft rocker arms should be removed in addition to making certain that the timing chain marks are easily seen before installing the timing chain guides and sprockets. For confirmation of its position, turn the crankshaft; next, remove dirt and grease on the joint surfaces; spread RTV sealant on the cover surfaces; grease the timing chains; bolt on the timing cover. Lastly replace the crankshaft front oil seal and continue with reversing the process put the right quantity of the engine oil and the coolant then start the engine to check for any possibilities of leaking.

Engines are intricate, especially during their servicing, and especially timing chains and camshaft servicing or if there is a cylinder head change. It would he wise to do a lot of research before undertaking the repairs and if at any one time you are in doubt, perhaps it is wise to seek professional help. The removal process starts with the removal of the negative battery terminal and the spark plugs with cylinder number one positioned at the top dead centre. Valve covers and timing chain covers must be removed, after which the crankshaft position sensor toothed wheel must also be removed, while taking note of its installed direction. The crankshaft has to be rotated such that it aligns to certain timing marks and various tools have to be used to lock the camshaft from rotating. Timing chain tensioners and chains are then released and pulled out together with the stationary guides and if required the camshaft sprockets can also be interchanged. Different procedures to do with the removal of rocker arms, the inspection of sprocket teeth as well as the examination of the condition of chains are provided for different engine types, and there is a strong recommendation that worn out parts be replaced. Among them are timing chain guides and sprockets that require proper installation and positioning; and tensioners that have to be compressed prior to any lock to keep the engines well functioning. Following these procedures the rocker arms are fitted and with the crankshaft turned an increase in friction is detected showing problems. The final step of the installation process is the reversal of the removal process with due focus being paid on replacement of all Timing marks and other related parts.

Remove the valve covers and the timing chain cover.

The camshaft(s) must be retained exactly at TDC; if the valve timing is off when the timing chain(s) are reinstalled, severe engine damage could result.

Carefully rotate the crankshaft by hand through at least two full revolutions. If you feel any resistance, stop and find the problem before proceeding.

Remove the timing chain cover, the crankshaft position sensor toothed wheel, and install the appropriate camshaft holding tools.

The timing system is complex, and severe engine damage will occur if mistakes are made. Do not attempt this procedure unless you are highly experienced. If unsure, consult an expert. Double-check all work before attempting to start the engine.