OEM Chevrolet Avalanche 2500 Crankshaft Seal

Chevrolet Avalanche 2500 Crankshaft Seal Parts and Q&A

• Timing Cover Oil Seal, Front
  12580743
  Q: How to replace the front crankshaft seal on Chevrolet Avalanche 2500?

  A:

  The first step to replace the crankshaft front oil seal requires the removal of the crankshaft balancer while protecting both the engine front cover and crankshaft sealing area from damage. The second step involves the removal of the crankshaft front cover oil seal. A fresh engine oil application must coat the new crankshaft front cover oil seal before its installation process. Installation of the crankshaft balancer needs to follow the use of the Front Cover Oil Seal Installer (J 42851) to put in the oil seal before removing the tool to reinstall the balancer.
• Rear Main Seal
  12587621
  Q: How to replace the rear crankshaft seal on Chevrolet Avalanche 2500?

  A:

  In order to replace the Crankshaft rear oil seal, one has to remove the Flywheel. Next, place the guide pins from the Crankshaft rear seal puller (J 43320) into the Crankshaft and place the puller on top while aligning over the guide pins. Mounting eight self-drilling sheet metal screws into the rear Crankshaft seal in criss-cross pattern using a suitable drill. These self tapping screws are in the package of the puller. Fit the center bolt of the puller to crack the Crankshaft off unravelling the seal, and then remove the guide pins. Make sure the Crankshaft is intangible to grit, loose rust, or burrs and had to disponibility adjust as required. Apply a very light oil film on the sealing side of the Crankshaft, ensuring that you don't put oil on the sealing side of the block. Mount the seal onto the Crankshaft rear seal installer (J 42849), and align the installer with the Crankshaft and thread attaching screws into the holes tapped into the base. Use a screw driver to tighten the screws securely so that the seal is seated squarely over the Crankshaft then turn the center nut until the installer bottoms out. Lastly, uncase the installer and re-install the Flywheel.