To remove the Continuous Variable Valve Timing (CVVT) assembly on the camshafts, do not disassemble it; instead, remove the center bolt from the end of the camshaft. First, position the engine at TDC and remove the valve covers. For 2006 and later models, take out the Oil Control Valve (OCV) mounting bolts and valves from the front camshaft bearing caps. Next, remove the timing chains or belt and camshaft sprockets, ensuring the cam timing marks are aligned. Clearly mark the camshafts to avoid confusion, then loosen the camshaft bearing cap bolts in 1/4-turn increments in reverse order of tightening until they can be removed by hand, starting with the outer caps. The bearing caps are marked for intake and exhaust; remove them and gently lift out the camshaft, storing the caps in the correct order. If needed, remove the valve hydraulic adjusters and rocker arms on 2006 and earlier 3.5L engines, or the bucket-style lifters on all other models, storing them separately. Apply camshaft installation lubricant to the camshaft lobes and bearing journals, then install the lifters or lash adjusters and rocker arms in their original positions. For 2006 and later models, install the timing chains around the sprockets and ensure the timing marks are aligned. For 2005 and earlier models, place each camshaft in its original position and verify the timing marks are lined up. Install the bearing caps in numerical order with arrows pointing toward the timing belt end, and install a new camshaft oil seal if necessary. Reinstall the remaining components in reverse order of removal, tightening the bearing cap bolts to the specified torque. Verify that all timing marks are aligned to prevent major engine damage, then run the engine and check for leaks and proper operation. For 2006 and later models, remove the valve cover and set number one cylinder to TDC on the compression stroke. Use a feeler gauge to measure the clearance between the camshaft lobes and the lifters on the indicated cylinders, ensuring a slight drag on the gauge. Rotate the engine one turn clockwise and repeat the procedure for the remaining valves. If clearances are outside limits, remove the camshaft(s) and lifter from the location with incorrect clearance, measuring it with a micrometer. Calculate the correct thickness of a lifter using the formula provided, purchase replacement lifters of the correct thickness, and after installing them and the camshafts, check the clearances again. Finally, apply camshaft installation lubricant to the camshaft lobes and bearing journals, install the lash adjusters in their original positions, place each camshaft in its original position, verify the timing marks, install the bearing caps in numerical order with arrows pointing toward the timing chain end, and tighten the bearing cap bolts in sequence to the specified torque.
Posted by KiaPartsNow Specialist 
