OEM Chevrolet Express 3500 Timing Chain

Chevrolet Express 3500 Timing Chain Parts and Q&A

• Timing Chain
  10114177
  Q: How to service and repair the timing chain on Chevrolet Express 3500?

  A:

  To service and repair the Timing Chain, one can start by fitting the woodruff keys (crankshaft balancer) inside the crankshaft keyway; also, the keyway of the crankshaft sprocket must align with the woodruff key (crankshaft balancer). Mount the crankshaft sprocket using j 5590 installer (J 5590) and swung it until aligning the crankshaft sprocket alignment mark was at 12 o'clock position. Next, install the Camshaft sprocket and the Camshaft Timing Chain, making sure that the alignment mark of the Camshaft sprocket points to 6 o'clock. Do not tighten the Camshaft sprocket using a hammer so as not to dislodge expansion cup plug (Camshaft rear bearing hole) or cause camshaf damage. Turn the Camshaft until the alignment marks of Camshaft and crankshaft sprocket are correctly aligned, and install the Camshaft sprocket bolts and tighten them with 25 nm (18 ft. Lbs.). Replace the keyway on the crankshaft position sensor reluctor ring to the woodruff key (crankshaft balancer) in the crankshaft, with a crankshaft position sensor reluctor ring mounted on the crankshaft to become fully seated against the crankshaft sprocket. Lastly, use the j 5590 installer (J 5590) to install the crankshaft position sensor reluctor ring onto the crankshaft by pressing till the ring is fully seated at the crankshaft sprocket.
• Timing Chain
  12646386
  Q: How to replace the timing chain and sprockets on Chevrolet Express 3500?

  A:

  First remove the Oil Pump then rotate the Crankshaft until Crankshaft and camshaft sprocket timing marks align before you begin working with the Timing Chain and sprockets. Deadline the Crankshaft turn after you remove the chain to avoid damaging piston assemblies or valves. Start by removing the camshaft sprocket bolts before you remove the camshaft sprocket and Timing Chain from the engine. To remove the Crankshaft sprocket professionals should use j 8433 pulley puller (J 8433), j 41816-2 Crankshaft end protector (J 41816-2), and j 41558 Crankshaft sprocket remover (J 41558). After sprocket removal they may need to remove the Crankshaft sprocket key. A thorough examination of the Timing Chain along with sprockets should occur before their installation. To reinsert the key, place it inside the Crankshaft keyway to a fully centered position. Place the Crankshaft sprocket onto the Crankshaft front while properly aligning the key of both parts. Use the j 41665 Crankshaft balancer and sprocket installer (J 41665) to fully position the sprocket against the flange. Align the Crankshaft sprocket using its rotational motion until you see the alignment mark at the 12 o'clock position while ensuring both the camshaft sprocket locating pin matches its hole and the sprocket teeth meet the Timing Chain. Begin by positioning the camshaft sprocket alignment mark directly at the 6 o'clock point before installing both sprocket and chain. Alignment of timing marks requires potential rotation of the camshaft or Crankshaft sprockets before installing camshaft sprocket bolts that must be torqued to 35 nm (26 ft. Lbs.). Finally, reinstall the Oil Pump.