OEM Chevrolet Silverado 3500 Crankshaft Seal

Chevrolet Silverado 3500 Crankshaft Seal Parts and Q&A

• Rear Main Seal
  97209342
  Q: How to replace the Rear Crankshaft Seal on 4.8L, 5.3L, and 6.0L engines on Chevrolet Silverado 3500?

  A:

  The j 41479 crankshaft rear oil seal installer (J 41479) serves as the tool required to replace crankshaft rear oil seals on 4.8l, 5.3l and 6.0l engines. Disassemble the engine Flywheel first along with the removal of the crankshaft rear oil seal from the rear cover. Verify removal of the Flywheel spacer when possible but refrain from oiling either the crankshaft surface or the inside diameter of the new oil seal because the original crankshaft rear oil seal must stay unused. A lubrication process using clean engine oil should be applied to both the new oil seal's outside diameter (OD) and the rear cover oil seal bore but should exclude contact with the crankshaft surface. After installing the j 41479 tapered cone and its bolts to the crankshaft rear position tighten them just enough but do not exceed the proper torque. Set the rear oil seal into position on the tapered cone before using force to drive it toward the rear cover bore. The j 41479 threaded rod must be threaded into the tapered cone until tool contact reaches the oil seal. At that point, position the oil seal precisely within the tool. Use the tool handle's clockwise rotation to seat the seal completely into the rear cover bore. After removing j 41479 you must replace the engine Flywheel.
• Timing Cover Oil Seal, Front
  12580743
  Q: How to replace the front crankshaft seal on Chevrolet Silverado 3500?

  A:

  The replacement process starts with the removal of the crankshaft balancer together with the crankshaft oil seal from the front cover. The oil seal sealing surface needs to remain free of lubrication when replacing it and users should avoid using the crankshaft front oil seal a second time. Clean engine oil must first be applied to both the new oil seal outer edge and the front cover oil seal bore. Set the Crankshaft Front Oil Seal into the Crankshaft Front Oil Seal Installer (J 41478) guide for installation. Use J 41478 threaded rod with integrated nut and washer and guide to direct installation of the oil seal through the crankshaft end until it fits properly into the front cover bore. Sustain pressure on the installer bolt hex with a wrench during clockwise rotation of the shut by another wrench until the seal encompasses the entire cover bore. The J 41478 tool needs removal after sealing the oil housing bore of the front cover. Inspect the entire seal installation area on the bore front surface. Finally, reinstall the crankshaft balancer.