Q: How to Remove and Replace the Camshaft in a 5.7L Engine with MDS on 2007 Dodge Ram 2500?
A: The replacement camshaft should also be suitable for the Multi Displacement System found on 5.7L engines before it is used. Film the camshaft lobes and bearing journals with oil before putting the camshaft into place. Second, fit the camshaft Tensioner plate assembly and tighten the bolts to 28 Nm (250 in. lbs.). Attach the timing chain and sprockets; check the end play of the camshaft; if it's not within limits, set in a new thrust plate. Place the oil pump and the oil pick-up tube into position. For every tappet that is reused, it has to go back in the same location and when a camshaft is replaced, you must change all the tappets. The 5.7L with MDS calls for roller tappets under normal operation and special roller tappets in the 1, 4, 6 and 7 cylinders labeled with a double hole on top for the deactivation latches. First, install the tappets and retaining yoke assembly and then install both left and right cylinder heads. Fill in the pushrods, rocker arms, timing case cover, oil pan, cylinder head covers, intake manifold, A/C compressor, generator, accessory drive belt, radiator, air cleaner assembly and battery negative cable after that. With the engine off, fill the coolant and engine oil, then start the engine and search for leaks.