Chapter13Reconditioningblock

Chapter13Reconditioningblock - Chapter 13 - Reconditioning...

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Chapter 13 - Reconditioning engine blocks Topics to be covered Line honing or boring Honing cylinders for overhaul Boring and honing oversize Installing sleeves Reconditioning connecting rods Preparing piston and rod assemblies Grinding and polishing crankshafts Grinding flywheels Overhauling oil pumps Copyright 2003 Gary Lewis – Dave Capitolo
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Reconditioning engine blocks Line honing and boring Purpose Advantages of line boring Advantages of line honing Procedure Changes crankshaft centerline
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Reconditioning engine blocks Reconditioning cylinders Measuring wear Honing for overhauls If ring ridge remains…
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Reconditioning engine blocks Reconditioning cylinders for oversize pistons Boring and honing cylinders oversize Boring machine vs. boring bar Common sizes of oversize pistons Bore cylinders .003” to .005” under final size Hone to final size and surface finish
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Reconditioning engine blocks Reconditioning cylinders for oversize pistons Honing cylinders oversize Cylinder alignment stays original Finish hone to size and surface finish Stone selection
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Reconditioning engine blocks Surface finishes for cylinders Range is 15 to 40 micro-inches Crosshatch pattern Moly rings = 15AA micro-inches
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Reconditioning engine blocks Dry sleeves Purpose Repair cracks or damage Restore bore to standard diameter Sizes available 3/32”, used for standard bore Strength comparable to original
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Reconditioning engine blocks Dry sleeves Setting the boring bar Measure sleeve in 6 spots Average measurements .0005” to .001” press for each inch of bore 3/16” step at bottom of cylinder
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Reconditioning engine blocks Dry sleeves Preparation Installing sleeves Chamfer bottom of sleeve Hydraulic press Clean sleeve
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Reconditioning engine blocks Dry sleeves Finishing the sleeve Trim top with boring bar and file/surface Bore ID, and leave .003” to .005” to hone
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Piston rings Stresses on rings Do pistons ever stop while the engine is running?
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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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Chapter13Reconditioningblock - Chapter 13 - Reconditioning...

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