Yukon 4WD V8-6.5L DSL Turbo VIN S (1997)
Piston: Testing and Inspection
Clean and Inspect
NOTE:
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Do not use a wire brush or glass bead blasting.
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Use a cleaning solution that will dissolve the carbon deposits.
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Remove the carbon in the ring grooves with a ring groove cleaner.
1. Clean the piston by removing all of the varnish and the carbon deposits.
2. Inspect the piston for the following conditions:
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Cracking or wear of the ring lands
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Burrs or nicks of the ring grooves
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Cracking of the skirts or pin bosses
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Cracking of the piston dome (Use Magnaflux Spot-check dye method or the equivalents
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Scuffing or deep scratches of the piston skirt
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Scuffing of the piston bore
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Wear of the piston pin retaining ring or the grooves
3. Inspect the connecting rod for the following conditions:
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Cracks or nicks on the connecting rod (Use Magnaflux Spot-check dye method or the equivalent.)
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Scuffing or scratching of the piston pin bushing
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Nicks or scoring of the bearing bore
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Bent or twisted rods
4. The connecting rod is not serviceable for the following repairs:
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Straightening
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Bushing replacement
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Connecting rod bearing bore enlargement