Fuel valve? 1J0127247E what does it do?

[Lang Hayr]

Does anyone know what the small plastic 'valve' which is fitted into the return fuel line, and then pushes into the top of a diesel fuel filter, actually does?. I'm going to replace my original filter with a heated fuel filter whilst doing a straight veg oil conversion. I was planning on simply removing this valve and joining the two pipes together.

[rwbaldwin]

Does anyone know what the small plastic 'valve' which is fitted into the return fuel line, and then pushes into the top of a diesel fuel filter, actually does?. I'm going to replace my original filter with a heated fuel filter whilst doing a straight veg oil conversion. I was planning on simply removing this valve and joining the two pipes together.

It's a temperature sensitive recirculation valve. Below 15°C, the valve allows the warmer fuel from the return line fuel to enter the filter. This helps to regulate fuel temperature. Above 30°C, the valve is fully closed to the filter.

Provided you have a heated filter, then you can do away with the valve.

[Lang Hayr]

Thank you, i shall be removing it soon!