Operation CHARM
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Porsche
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1989
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928 CS V8-4957cc 5.0L
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Repair and Diagnosis
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Maintenance
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Service Intervals
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Normal Service
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72000 MI or 115200 KM
72000 MI or 115200 KM
Inspect
Timing Belt
Drive Belt Tensioner
Replace
Spark Plug
Oxygen Sensor
Fluid - A/T
Air Filter Element
Replace air pump filter where applicable