voguev8 Posted September 6, 2013 Posted September 6, 2013 HiPurchased a replacement fuel filter a few weeks ago but not sure if any special procedure needed to change.ie Do I need to depressurize the fuel system and does it need repriming Thanks Quote
Johndouglas Posted September 7, 2013 Posted September 7, 2013 There's no need to de-pressurize but sometimes there's difficulty getting it primed. Some versions have a lift pump in the tank which strikes up for a few minutes before each switch on. Others are without the lift pump but have a hand primer close to the filter bowl. Also there's a variety of different filters fitted. It's most important that the replacement filter matches the one being removed. Below are a couple of piccys of two different filters used on C5s. The first one's lid is held by a screwed ring. Detach the two pipe junctions and the electrical connector. Use a strap wrench to remove the screwed ring and lift off the top. On the second piccy the lid is removed by using a socket on the plastic 'nut'. Use a well-fitting socket - the corners are easily damaged. Unscrew until the lid lifts away. In both cases, use a new rubber ring when refitting. Before starting work it's advisable to pack rags under the filter bowl. Also a small bowl is useful to put the dripping filter into. Quote
mhedwig Posted September 7, 2013 Posted September 7, 2013 dont use a strap wrench if it slips it breaks top of filter housing proper tool is only a few pounds make sure filter housing is full of diesel when new filter is fitted and it will not need bleeding or priming Quote
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