Before doing anything, it is paramount to put off the lockout feature if you have a Delco Loc II audio system fitted in your car. Undo the crankshaft pulley. Remove the chain cover and then the timing chain itself from your engine. You need to check for sprocket teeth wear as well as excessive slack in the chain before separating them from each other; also inspect the condition of the timing chain tensioner. Replacing worn-out sprockets would be necessary when any sign of wear is detected on either or both of them. Engine performance may become unreliable, fuel efficiency decrease, and power loss can occur due to an old timing chain that needs to be replaced. As such, when one component fails you should go ahead and replace others related including tensioners. In such cases where replacement of chains or sprockets is needed, carry out these steps mentioned nextly: Insert crankshaft pulley hub temporarily and attach its bolt; turn crankshaft until marks coincide on camshaft sprockets together with those on tabs; compress spring against tensioner while putting a suitable sized drill bit into its hole until it does not go back anymore; use two bolts in front part of crankshaft balancer hub for preventing turning engine when removing camshaft bolt by means of a prybar (i.e., an unusually shaped piece without sharp ends which serves for levering objects); remove camshaft sprocket by gently prying outside with screwdrivers at two different points thus allowing their action upon outer rim so that this can easily come away followed by withdrawal itself fully along with accompanying gear assembly assembled tandem with other parts making up entire unit (comprising main gear); first engage toothed wheel then ensure link aligns properly within it before fitting onto shaft again before finally securing threaded fastener through frictional engagement only so as not allow loosening thereof during operation afterwards; lastly push against spring-loaded holder thereby releasing pressure from chain which in turn causes it to snap into place; lubricate motor with fresh oiling substance. After two full wheel turns, ensure timing marks coincide once again then put on new gasket and tighten bolts fixing the cover over gear train opening. Mount pan for oil content. All other steps are considered as reverse of what was initially carried out during removal procedure.
