The timing system is intricate and it should only be done by highly experienced people. Serious engine damage could result. If you are unsure of your own capability, a specialist in this field should be consulted before any attempt is made for this repair. Check and ensure that the work is correct prior to starting any machine. Removal, on the other hand, comprises removal of valve cover, crankshaft front oil seal, drivebelt(s), and auxiliary drivebelt tensioner. Tie down the engine at TDC for No 1 cylinder then take out the timing chain tensioner. Release the crankshaft pulley hub and make a tool to hold it in place. Unscrew and remove the bolt from pulley hub then draw out the hub from the crankshaft. Remove plugs from timing chain cover and take away all timing chain guides provided there are no problems encountered with its disengagement from sprocket. Detach VANOS adjusting units then lift up timing chain module together with chain plus crankshaft sprocket. In case of necessity conduct disengagement of the chain as well as removing it from such module. Installation involves making sure that No 1 piston still remains at TDC thus chaining can now engage with crankshaft sprocket while putting down timing module along with chain; get through sprocket using crankshaft pulley hub respectively by moving lower part below pulley first; push new retaining bolt of this item into place and torque accordingly - meanwhile fix new oil seal properly while fastening these chains; just like one way was removed gaskets will also need replacement same applies to seats being replaced while aluminum bolts tightened as per their specific torque values among other things Finally install drivebelt(s).
