Express 2500 V8-6.6L DSL Turbo (2010)
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Normal-Compression builds up quickly and evenly to the specified compression for each cylinder.
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Piston Rings Leaking-Compression is low on the first stroke. Compression builds up with the following strokes but does not reach normal.
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Valves Leaking-Compression is low on the first stroke. Compression usually does not build up on the following strokes.