2008 Cadillac DTS Timing Chain

You will need to remove the right secondary camshaft drive chain, the left secondary drive chain tensioner, and the left camshaft cover, then ensure both camshaft sprocket drive pins are at the top of their rotation, install the J 44212 over the camshafts, use an open end wrench on the hex cast into the camshaft to prevent the camshaft from rotating when removing the camshaft sprocket bolt, remove the left intake camshaft sprocket bolt, slide the left intake camshaft sprocket off of the camshaft and remove the left secondary camshaft drive chain from the camshaft sprocket teeth, lift the left secondary camshaft drive chain from the camshaft intermediate drive shaft sprocket teeth, then remove the left secondary camshaft drive chain from the engine.

You will need J 39946 Crankshaft Socket-4.0L and 4.6L.

The recommended torque is 60 N.m (44 lb-ft).

You will need to remove the oil pump, align the primary timing marks using the J 39946, remove the secondary camshaft drive chains, the primary drive chain tensioner, and the camshaft intermediate sprocket retaining bolt, then remove the following as an assembly: the primary camshaft drive chain, the crankshaft sprocket and the camshaft intermediate sprocket. Finally, you can clean and inspect the camshaft timing drive components.

You mustn't remove the pin holding the tensioner until the secondary timing chains are installed.