bronze filter in the fuel line banjo bolt on the rear of fuel pump 99 diesel
OK I know the sintered bronze filter is to stop any fluff from new fuel filters but cant find a answer to why there is a little hole on the side and its function .The reason I'm chasing this info is can it be drilled to a bigger size because everytime I clean the filter and the hole with co2 cleaner the td4.2t goes like a rocket then slowly drops back till the next clean usually about month to month and a half.
Over to you