Solution Date: 5/30/2018 Serial Number Break: 181500001
Failure Mode:
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- Head Gasket Leaks
Root Cause:
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- Top deck surface finish was to rough or smooth along with potential peaks and valleys that were out of spec
- Improper RA or RZ surface finish specs and measuring methods
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Solution
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- Updated profilometer that measure both RA and RZ
- Increased measurement area
Engine Surface Finish – BEFORE
Engine Surface Finish – AFTER