davedisco Posted December 24, 2007 Share Posted December 24, 2007 Hi all I have a 300 tdi discovery and it seems the fuel lift pump is leaking how easy are they to replace? Thanks in Advance Quote Link to comment Share on other sites More sharing options...
cress Posted December 24, 2007 Share Posted December 24, 2007 As I remember the swap is very easy. Undo pipe unions remove bolts holding fuel pump to block, remove gasket and replace (I used some hymolar ) fit new pump to block, tighten bolts. I do remember having to get the old pipework nuts from the old pump, bit of a pain as you have to remove the old olives first. Put the pipe unions onto the new pump followed by new olives. Make sure the pipe unions are from the correct pipes as I think they are slightly different in size. Tighten pipework up and you're done. (check for leaks) I.me sure someone will elaborate or blow this out the water Ivan Quote Link to comment Share on other sites More sharing options...
davedisco Posted December 24, 2007 Author Share Posted December 24, 2007 As I remember the swap is very easy. Undo pipe unions remove bolts holding fuel pump to block, remove gasket and replace (I used some hymolar ) fit new pump to block, tighten bolts. I do remember having to get the old pipework nuts from the old pump, bit of a pain as you have to remove the old olives first.Put the pipe unions onto the new pump followed by new olives. Make sure the pipe unions are from the correct pipes as I think they are slightly different in size. Tighten pipework up and you're done. (check for leaks) I.me sure someone will elaborate or blow this out the water Ivan Thanks for that Do you know if the bolts are easy to get to? Quote Link to comment Share on other sites More sharing options...
cress Posted December 24, 2007 Share Posted December 24, 2007 Yeah, pretty sure they are quite easy to get at with a socket. When refitting the pump, if you find it difficult to seat it against the block, just flick the key to turn the engine over about half a rev to move the lift pump cam. Hope this helps Ivan Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted December 24, 2007 Share Posted December 24, 2007 2 bolts hold it to the block (10mm I think). A little filddly around the injector lines, but as above - pretty straight forward. Quote Link to comment Share on other sites More sharing options...
foxminer Posted December 24, 2007 Share Posted December 24, 2007 Am i right in saying, as far as i can remember when fitting the new pump that the arm on the pump has to go under the lift pump cam, otherwise you won`t be able to use the lift pump manually. Someone correct me if i`m wrong it was a long time ago when i had a 300 tdi. Foxminer. Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted December 24, 2007 Share Posted December 24, 2007 its the bottom, the flat part of the pump lever, that runs on the cam. Quote Link to comment Share on other sites More sharing options...
freeagent Posted December 25, 2007 Share Posted December 25, 2007 if the cam is in the wrong position you can still fit the lift pump, you just have to pull it upto the engine block with the bolts. its not a hard job, just a bit fidly, especially if you've got big hands like mine... make sure you get two new pipe union nuts and two new olives when you buy the pump.. oh and don't buy a B***part one, they are carp and only last a few months... Quote Link to comment Share on other sites More sharing options...
davedisco Posted December 25, 2007 Author Share Posted December 25, 2007 Thanks for all your help will be fitting it over christmas Merry christmas to you all Quote Link to comment Share on other sites More sharing options...
Thys Posted December 26, 2007 Share Posted December 26, 2007 As I remember the swap is very easy. Undo pipe unions remove bolts holding fuel pump to block, remove gasket and replace (I used some hymolar ) fit new pump to block, tighten bolts. I do remember having to get the old pipework nuts from the old pump, bit of a pain as you have to remove the old olives first.Put the pipe unions onto the new pump followed by new olives. Make sure the pipe unions are from the correct pipes as I think they are slightly different in size. Tighten pipework up and you're done. (check for leaks) I.me sure someone will elaborate or blow this out the water Ivan Oh yes, I did blow this out of the water a couple of posts ago, look for the two topics I posted on 04 November 2007, "Hand priming ......" and "Non OE lifting pump...." Quote Link to comment Share on other sites More sharing options...
davedisco Posted December 31, 2007 Author Share Posted December 31, 2007 Just trying to fit lift pump old one taken out but having a right job fitting the new one.. any one got any ideas? tried turning engine over to move cam but no joy Quote Link to comment Share on other sites More sharing options...
cress Posted December 31, 2007 Share Posted December 31, 2007 Just trying to fit lift pump old one taken out but having a right job fitting the new one..any one got any ideas? tried turning engine over to move cam but no joy Hi Dave, The pump should pretty much fall in to the block unless the cam is in pump position. I would check that the new pump is exactly the same as the old one, (operating arm is same length and angled the same) Secondly make sure the operating arm is locating above the cam as you install it. If it obviously will not fit I would suggest the wrong pump. It can really be only one of these two things. Ivan Quote Link to comment Share on other sites More sharing options...
davedisco Posted December 31, 2007 Author Share Posted December 31, 2007 Hi Dave, The pump should pretty much fall in to the block unless the cam is in pump position. I would check that the new pump is exactly the same as the old one, (operating arm is same length and angled the same) Secondly make sure the operating arm is locating above the cam as you install it. If it obviously will not fit I would suggest the wrong pump. It can really be only one of these two things. Ivan Thanks Ivan The arm appears the same length i just cant seem to get the pump to fit tight to the block without really pushing it in? Quote Link to comment Share on other sites More sharing options...
cress Posted December 31, 2007 Share Posted December 31, 2007 Thanks IvanThe arm appears the same length i just cant seem to get the pump to fit tight to the block without really pushing it in? Find the download manual for disco, only a short section on the fuel lift pump though. http://forums.lr4x4.com/index.php?showtopic=1442 Ivan Quote Link to comment Share on other sites More sharing options...
davedisco Posted December 31, 2007 Author Share Posted December 31, 2007 Find the download manual for disco, only a short section on the fuel lift pump though.http://forums.lr4x4.com/index.php?showtopic=1442 Ivan Thanks again Ivan Happy New Year Quote Link to comment Share on other sites More sharing options...
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