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Home >> Buick >> 1991 >> Roadmaster Estate Wagon V8-305 5.0L >> Repair and Diagnosis >> Specifications >> Pressure, Vacuum and Temperature Specifications >> Compression Check
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Compression Check

The lowest reading cylinder should not be less than 70% of the highest and no cylinder reading should be less than 689 kPa (100 psi). Perform compression test with engine at normal operating temperature, spark plugs removed and throttle wide open.