Crankshaft and Bearing Cleaning and Inspection
Crankshaft and Bearing Cleaning and Inspection |
Special Tools
EN-7872 Dial Indicator BaseFor equivalent regional tools, refer to Special Tools .
Cleaning Procedure |
2. |
Thoroughly clean all oil passages and inspect for restrictions or burrs.
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3. |
Refer to
Safety Glasses and Compressed Air Warning
.
Dry the crankshaft with compressed air. |
Visual Inspection |
1. |
Perform a visual inspection of the crankshaft for damage.
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2. |
The crankshaft position reluctor ring may be replaced if damaged.
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3. |
Refer to
Fastener Caution
.
Tighten the bolts of the crankshaft position sensor's magnetic ring to 15 Nm (11 lb ft) . |
4. |
Inspect the crankshaft journals for wear (1). The journals should be smooth, with no signs of scoring, wear, or damage.
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5. |
Inspect the crankshaft journals for grooves or scoring (2).
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6. |
Inspect the crankshaft journals for scratches or wear (3).
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7. |
Inspect the crankshaft journals for pitting or imbedded bearing material (4).
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Crankshaft Journals Measurement |
1. |
Measure the crankshaft journals for out-of-round.
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2. |
Measure the crankshaft journals for taper.
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3. |
Measure the crankshaft runout.
Using wooden V-blocks, support the crankshaft on the front and rear journals. |
4. |
Use the
EN-7872
dial indicator base (1) in order to measure the crankshaft runout at the front and rear intermediate journals.
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5. |
Use the
EN-7872
dial indicator (1) in order to measure the run-out of the crankshaft rear flange.
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6. |
Replace the crankshaft if the measurements are not within specifications.
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Visual Inspection |
1. |
Inspect crankshaft bearings for craters or pockets. Flattened sections on the bearing halves also indicate fatigue.
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2. |
Inspect the crankshaft bearings for excessive scoring or discoloration.
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3. |
Inspect the crankshaft bearings for dirt or debris imbedded into the bearing material.
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4. |
Inspect the crankshaft bearings for improper seating indicated by bright, polished sections of the bearing.
If the lower half of the bearing is worn or damaged, both upper and lower halves should be replaced. Generally, if the lower half is suitable for use, the upper half should also be suitable for use. |