treebloke Posted March 16, 2013 Share Posted March 16, 2013 Changed the fuel filter today and within minutes it was hot, not to hot that you cannot touch it but certainly very warm. I guess this is due to the fuel returning back to the tank after running through the system?. Quote Link to comment Share on other sites More sharing options...
Tanuki Posted March 16, 2013 Share Posted March 16, 2013 Don't fret about it. The fuel-circulation on a TD5 is - to the uninitiated - both deeply strange and potentially a cause for unnecessary anxiety. You've got a low- and high-pressure feed from the fuel-pump to the filter (where any bubbles or air are separated from the fuel) then after the high-pressure fuel's been fed up to the engine and put through an even-higher-pressure engine-driven fuel-pump to supply the injectors, any excess (which can be at seriously-high temperatures because it's been fed at mega-high pressures through channels in the cylinder-head only millimetres away from the combustion-process going on in the cylinders) is fed back through an engine-coolant-cooled heat-exchanger (where it may lose a bit of heat if it's lucky) to the fuel-pump for another cycle round the process. Seeing steam rising from the fuel-filter in wet weather is quite normal on a TD5. --Tanuki "The sudden moistness can come as a shock for the uninitiated". Quote Link to comment Share on other sites More sharing options...
chrisbowler Posted March 16, 2013 Share Posted March 16, 2013 Just to add, the injectors are a high pressure generator, there is no high pressure pump in a TD5 engine. The injectors have a chamber that when the cam moves a rocker arm, pushes a plunger that compresses the fuel, then at the right time an electric switch fired by ecu, opens the injector into the cylinder. Chris bowler Quote Link to comment Share on other sites More sharing options...
clive-240 Posted March 17, 2013 Share Posted March 17, 2013 On the fuel cooler point mine has no water connected too it as it leaks is this going to cause me a problem Quote Link to comment Share on other sites More sharing options...
RedLineMike Posted March 17, 2013 Share Posted March 17, 2013 I ru my td5 with the fuel cooler bypassed, now given how hot diesel is when they make it I haven't found any cause to worry, plus having a big fuel tank allows it to cool of to a degree before it goes back I to the system Quote Link to comment Share on other sites More sharing options...
treebloke Posted March 17, 2013 Author Share Posted March 17, 2013 Thanks for the replies lads, much appreciated. Quote Link to comment Share on other sites More sharing options...
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