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Posts Tagged: blowby


What is blowby? Blowby is gas that escapes past the pistons during the compression and power strokes of an internal combustion engine. The gas is a mixture of unburned fuel, exhaust and water vapor along with traces of oil. Blowby escapes past the piston rings due to wear and normal ring gap. What is piston ring gap? All piston rings are formed in a circle. But to install the ring on the piston, it must have an opening. This opening is referred to as the ring gap”. During installation the … Read More

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