OEM 2005 Chevrolet Express 2500 Timing Chain

2005 Chevrolet Express 2500 Parts Questions & Experts Answers

• Q: How to replace the timing chain and sprockets on 2005 Chevrolet Express 2500?

  A: Engine front cover and Crankshaft position sensor reluctor ring removal must happen before Timing Chain and sprockets replacement. Before rotating the engine install a 7/16-20 x 1 inch bolt through the Crankshaft's end but make sure the bolt is not the balancer bolt and remains shorter than 1 inch to prevent damage. Use a 7/16-20 x 1 inch bolt to turn the Crankshaft until both sprocket timing marks line up while the number four cylinder exists at the top dead center (TDC) of its compression stroke. Proceed by removing the camshaft sprocket bolts then unfasten both the camshaft sprocket together with its Timing Chain. Use the Crankshaft gear remover (J 5825-A) to extract the Crankshaft sprocket before removing the Crankshaft balancer key. Examine the Timing Chain and sprockets for damage which requires thorough cleaning before use. Insert the Crankshaft balancer key into the Crankshaft keyway where it needs to be parallel or slightly tilted forward. Install the Crankshaft sprocket by aligning its keyway with the balancer key using the pinion bearing race installer - rear (J 5590). Set the Crankshaft to face the 12 o'clock mark while you mount the camshaft sprocket which must show its alignment at 6 o'clock. Before final installation position the sprockets for correct alignment. Then install the camshaft sprocket bolts while tightening each bolt to 25 nm (18 ft. Lbs.). Use a Crankshaft position sensor reluctor ring by aligning its keyway with the balancer key while pushing it onto the Crankshaft until full seat is reached afterward remove the bolt from the Crankshaft and install the engine front cover.