Blow-by-Gas Resistance

Significance and Test Method

Blow-by gas is generally understood to be gases that enter the crankcase in the combustion engine due to the overflow of the piston.

Especially in engines that are regularly used for only a short time, an aggressive mixture of the blow-by gases with the engine oil can occur, resulting in a harmful mix of exhaust gases, oil, unburnt fuel and water.

Such aggressive blow-by gas mixtures can severely attack seals or hoses and lead to damage or failure of the components. To prevent this, OEMs specify different test standards to verify the resistance of the elastomers against blow-by gases.

We test the blow-by gas resistance of materials in accordance with OEM requirements.