Special care should be taken to ensure that the crankshaft or
Camshafts are not turned individually as the timing chain is disconnected since it will cause damage to the valves. In case the battery is switched off, a number of systems will have to be re-learned to be used properly. This is a process peculiar to the CCTA and CBFA engines. To remove the upper timing chain cover, the engine cover and oil dipstick tube should be first removed making sure that the O-ring at the bottom of the dipstick tube is changed. The charge air pipe is supposed to be moved aside with the disconnecting of the required components provided it is equipped with a noise generator. Coolant hoses should be forced back, electrical connector to the camshaft adjustment valve should also be disconnected and then the valve and seal should be removed and replaced. Removal of the upper timing chain cover is then done in a star fashion and the gasket has to be discarded and replaced. To install, one should first clean the cover and the
Cylinder Head faces, then to install a new gasket then tighten the cover in that order. Lower cover removal This includes disconnection of battery, lifting up of the vehicle and removal of several parts such as the splash shield, engine cover and inner fender liner and emptying of the engine oil as well as the air charge pipe. Crankshaft pulley should be handled carefully to avoid its damage and engine should be placed in support to have additional disassembling. Oil dipstick tube and turbocharger components should be disconnected and then the lower cover can be removed. Installation involves cleaning of surfaces, putting on RTV seals and alignment of timing marks. The timing chain and tensioners should be maintained with care so as not to cause dire engine harm and the entire parts are to be reassembled in the same sequence of their removal making sure that the crankshaft is turned by hand to ensure that it does not meet any resistance and only then the engine is started. The balance shaft timing chain and tensioner are also to be installed taking care; the tensioner is to be thread locked with sealer and installed.