OEM 2008 Scion xB Camshaft

2008 Scion xB Camshaft Parts Q&A

• Q: How to remove the camshaft on 2008 Scion xB?

  A: The process of camshaft removal from the 2AZ-FE engine starts with removing rear engine under cover RH followed by No.1 engine cover sub-assembly and ignition coil assembly and spark plug. The procedure starts by removing: two ventilation hoses, two bolts separating wire harness brackets, and eight bolts connected to two nuts for detaching both cover and gasket. Use the crankshaft pulley to rotate to the TDC position where the guide fits the timing mark "0" on the timing chain cover. At this stage confirm that all camshaft timing gear indications line up with indicator points on the No. 1 and No. 2 bearing caps before you switch the pulley once. Apply a mark to the timing chain at the points corresponding to the timing marks. Through this procedure loosen the No. 2 camshaft timing gear or sprocket by using a wrench to hold the No. 2 camshaft while the mechanic gradually loosens the timing bolt. Next proceed to remove the No. 1 chain tensioner assembly. One must start the No. 2 camshaft removal process by equally loosening and then removing the specified sequence of 10 bearing cap bolts followed by removing five bearing caps and maintaining grip on the No. 2 camshaft to take out the camshaft timing sprocket set bolt and sprocket as well as timing chain. During camshaft removal follow the previous steps of 10 bearing cap bolt loosening, subsequent bolt removal, then 5 bearing cap removal while holding the timing chain before securing it with a thread before entering the timing chain cover. A vise should clamp the camshaft to prevent spinning as users wrap vinyl tape around all oil ports except the advance side port before directing 150 kPa (1.5 kgf/cm2, 22 psi) air pressure through the oil path while turning the camshaft timing gear counterclockwise manually. Set a cloth across the paths to prevent oil drops while working. When dealing with the camshaft timing gear flange bolt consumers must take off just the single bolt yet they must keep the remaining 4 bolts in place and those reusing the timing gear should first unlock the straight pin before reinstalling.