Chapter11Crackdetectionrepai

- Crack detection repair Causes of cracks in heads blocks Overheating Freezing Expansion and contraction Cracks start from water jacket side Only

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Overheating Freezing Expansion and contraction Cracks start from water jacket side Only heads and blocks are repaired Copyright 2003 Gary Lewis – Dave Capitolo
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Core shifts Sharp corners after machining Siamese valves & ports
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Dry magnetic particle inspection for iron parts Clean area to base metal Set up magnetic field on part Dust with magnetic powder Cracks will be visible Test in different directions
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Wet magnetic particle inspection Clean parts to base metal Part is magnetized under black light Spray with solvent carrying magnetic particles Cracks become visible Part can then be demagnetized
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Dye penetrants Used on all materials Clean parts to base metal Coat part in penetrant Wait a few minutes and wipe off excess Spray part with developer & allow to dry to a powder
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This note was uploaded on 01/06/2012 for the course AUTO 94 taught by Professor Davecapitolo during the Fall '03 term at DeAnza College.

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- Crack detection repair Causes of cracks in heads blocks Overheating Freezing Expansion and contraction Cracks start from water jacket side Only

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