leaky XM diesel injector pump

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dyerfam
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Joined: 19 Nov 2001, 05:10
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leaky XM diesel injector pump

Post by dyerfam » 17 Dec 2001, 05:11

The pump on my 200K miles XM estate has started to leak from around where the spindle for the accelerator lever enters the main pump body (Lucas/CAV rotodiesel). Has anyone else had to tackle this? I dont know what is in there - a bush or a replaceable seal. It would be useful to know before I scrub up and begin to operate.
John Dyer
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Dave Burns
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Post by Dave Burns » 17 Dec 2001, 17:45

This is one area where I put heaps of trust in the specialist's and let them get on with it, even if you can dismantle and re-assemble it without contaminating the interior, will you be able to get hold of the replacement parts.
Good luck
Dave
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dyerfam
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Post by dyerfam » 18 Jan 2002, 05:44

Well I did it! Turns out not to be very hard to do at all. I took a ride down to a very helpful firm here in Wales called South West Electro Diesel Carmarthen. Before I could explain what the problem was they had already guessed and said it was a common fault. They were very busy and explained it would be a while till they could book the work in. However they had another CAV pump on the bench and described what was needed. Basically you clean the outside of the pump thoroughly, undo linkages (in my case marking the position of every thing as you go along)and remove the torx screws holding on the top cover.Throw away the cover and the spindle and fit the nice new shiny ones provided along with an O ring seal for the top. Reassembly is, as they say, the reverse.Fixed everything up as it was - all adjustment screws exactly as they were and the cold start cable clamped back in the crease it left when I took the thing off. Bleed the fuel system and bingo.
As for getting the parts - all are available. However saying it is a type 62 pump is not enough. To order the parts they need to know the "844" number on the pumps identity plate. This blue plate is on the underside of the pump (it would be)and has to be read with an inspection mirror. In my case the numbers read TYPE 062 DPC R 844 3B880A. It is the last 6 letters and numbers that are needed.
The parts were cover - 9100-474F, Spindle - 9100-376A, and an O ring seal. Total cost £40, fitting time 2.5 hours.
I assume all 2.1 T Diesel models will be much the same. I was warned that eventually the bearings in the pump will fail hastened by the reduced amount of sulphur in modern diesel fuel. I was advised to put some engine oil in the filter housing when I change the fuel filter at services. I would have thought any oil would soon be washed through by the diesel and not be effective for long, but I will do all I can. Anyway problem solved.
John Dyer
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Dave Burns
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Post by Dave Burns » 20 Jan 2002, 01:21

Glad to hear you have got it cracked John, what I want to know is what happens when the bearings fail, do they go down in a big way and possibly let the timing belt ride off the pulley or sieze the pump up snapping the belt with the results that we all dread.
I was told some time ago by a fuel injection specialist that CAV pumps had delicate bearings, some people had destroyed them trying to get the pulley off by walloping the shaft instead of using a puller, the same bloke also said the Bosch pumps were better made and would stand some such torture, I don't intend to find out if he was right though.
Dave
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dyerfam
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Post by dyerfam » 20 Jan 2002, 19:00

From what I understand the bearings begin to shed bits of metal which damages the shaft seal and can build up in the puimp to cause back pressure inside. The result is a diesel leak from the bearing shaft into the timing belt housing. I have heard before that it is this sort of leak which is a very common cause of cam belt failure. I'm no expert but this seems plausible.
I have also looked around various sites for info on citroen diesels and like you have heard that Bosch pumps are stronger (and more easy to repair).
Have you ever visited Citroen BX do-it-yourself pages which has info on both BX and XM engines?
Link is www.tramontana.co.hu/citroen
John Dyer
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Dave Burns
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Joined: 14 May 2001, 05:30
Location: United Kingdom
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Post by Dave Burns » 20 Jan 2002, 22:22

Thank's John, thats a very useful site for Cit owners, some good reading to, didn't know soot in the oil was so destructive.
You live and learn
Dave
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