Camshaft and the lifters should always be checeked for wear or damage before being fitted and end play of camshaft should be checeked before removing. Hydraulic lifters in the models produced between 1996 to 2000 are self adjusting and do not need adjustment, but there is a process of checking noisy lifters. Domesticated models after year 2004 employs the use of CVVT function that optimizes the engine performance through adjusting the intake camshaft timing while it is in operation. To remove, begin hereby removing the valve cover. On 1998 and earlier 1.8L and 2012 and earlier 2.0L models, your removal procedure includes timing cover,
Timing Belt and camshaft timing belt sprocket; for 2011 and later 1.8L and all 2013 and later models, the removal procedures entail
Timing Chain cover and the timing chain. If special tools are available, timing chain can be done with the cover on but it is preferable to remove the chain. Before tightening the camshaft bearing caps, first you need to loosen it in a diagonal sequence, however, while doing so, ensure the intake and the exhaust cam caps are not interchanged and are well labeled. Take out the two camshafts together with the timing chain as a unit, and dispose of the old
Camshaft Seal. On all 1.8 L DOHC engines produced before the end of 1998, and all cars with 2.0 L DOHC engines, remove the lower chain guide. Scrub the indicate faces of the hydraulic lifters or shims and remove the mark on them to reinstall them later before taking them off the cylinder head. On vehicles after the year 2011, you should remove the camshaft carrier and put labels on the rocker arms and the lifters. A review of the cam timing chain and sprockets and their cleaning as well as replacement where there is excessive wear or damage. To install, it is recommended that the lifters be washed using clean engine oil, then the lifters are consequently fitted on their corresponding bores with the camshaft lobe contact surfaces well lubricated with clean engine oil. For the 2011 and later models, use RTV sealer to the camshaft carrier before mating it into the engine. Timing marks of the camshaft should be properly aligned before slotting the camshaft timing chain in place and greasing the camshaft oil seal before sliding it over the camshaft nose. Proceed to lower the camshafts gently into their respective position with the tops of the lobes for the No. 1 cylinder upwards. Tighten the bearing caps to opposite ones, then to the next opposite ones, and for the 2011 and later version, use the special tightening pattern that was given above. Fit the timing belt or chain as appropriate and ensure that there is the correct alignment of the marks, and inspect, adjust or replace the variable valve clearance as the case may be. The rest of the installation is carried out in the reverse of the removal procedure with checks on valve clearances on certain models.