Crankshaft and Bearing Cleaning and Inspection: Notes
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- J 7872 Dial Indicator Set
- J 45059 Angle Meter
- Clean the crankshaft and bearings.
- Inspect the crankshaft for the following conditions.
- Excessive wear or damage on the surface of the crankshaft journals.
- Excessive wear or damage to the crankshaft gear.
- Excessive wear or damage on the oil seal fitting surface.
- Inspect the oil ports for obstructions.
- Replace the crankshaft if there is excessive wear or damage to the journals, oil seal fitting surface or to the crankshaft gear.
- Measure the crankshaft run out.
- Mount the crankshaft in wooden V-blocks.
- Set J 7872 on the center of the crankshaft journal.
- Turn the crankshaft in the normal direction of rotation.
- Record readings. The production value is 0.05 mm (0.0020 in) and the service limit is 0.44 mm (0.0173 in).
- Measure the crankshaft journal diameter across four points.
- The crankshaft journal outside diameter is 79.905-79.925 mm (3.1459-3.1466 in) and the service limit is 79.89 mm (3.1453 in).
- Replace the crankshaft if the measured value is less than the service limit.
- Measure the crankpin outside diameter across four points.
- The crankpin outside diameter is 62.902-62.922 mm (2.4765-2.4772 in) and the service limit is 62.88 mm (2.4756 in).
- Replace the crankshaft if the measured value is less than the service limit.