Hello there, I recently got a 1994 Citroen C15 and have got some good tips from this forum in the past. I need a bit of advice about Lucas CAV Diesel pumps. My van has got a fuel leak from the pump where the throttle arm pivot goes into the pump. It still runs fine and presumably just needs a new seal. Is it possible to get parts for these pumps, and if so is it a DIY job to change that seal. Or is it easier to get a complete pump from a scrap yard.
Any ideas, experience or advice welcome.
Cheers
C15 van fuel leak
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jonathan_dyane
- Posts: 229
- Joined: 10 May 2004, 23:32
Hi Lexan.
As you guessed your problem is almost definately a failed seal for the throttle pivot. This is easily available from any good diesel specialist and should be DIY (mark position of levers on top before removing to take off pump lid) or otherwise fitted cheaply.
However, before you go down this route, I would recommend you remove the banjo that secures the return pipe; this contains a pressure releif valve. Ensure that the ball moves freely (should click nicely when you shake it) and there are *no* tracings of metal fillings within. When the pump's bearings fail the first sign is usually a leak caused by the pressure releif valve becoming jammed with swarf from the failed bearings.
It is prob'ly just the seal has gone, but better safe than sorry...
As you guessed your problem is almost definately a failed seal for the throttle pivot. This is easily available from any good diesel specialist and should be DIY (mark position of levers on top before removing to take off pump lid) or otherwise fitted cheaply.
However, before you go down this route, I would recommend you remove the banjo that secures the return pipe; this contains a pressure releif valve. Ensure that the ball moves freely (should click nicely when you shake it) and there are *no* tracings of metal fillings within. When the pump's bearings fail the first sign is usually a leak caused by the pressure releif valve becoming jammed with swarf from the failed bearings.
It is prob'ly just the seal has gone, but better safe than sorry...
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lexan
- Posts: 9
- Joined: 06 Jan 2005, 01:04
Cheers Jonathan. I'll check that valve first as you suggest. I serviced the engine when I got it as it had been obviously neglected. The inside of the fuel filter housing was full of bits so it wouldn't surprise me if the pump had worn out. Having said that the engine runs well and doesn't make any unusual noises so I'll cross my fingers and hope its just the seal.........!
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danielsydney
- Posts: 114
- Joined: 03 Sep 2001, 08:40
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lexan
- Posts: 9
- Joined: 06 Jan 2005, 01:04
Sorry danielsydney - no digi camera. take a look on ebay uk or autotrader - theres usually plenty for sale with pictures. (they probably look better than mine as well).
If anyones interested I got a an overhaul kit for the lucas/cav pump for £6.00. Providing the job goes alright thats a cheap repair.
If anyones interested I got a an overhaul kit for the lucas/cav pump for £6.00. Providing the job goes alright thats a cheap repair.
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jonathan_dyane
- Posts: 229
- Joined: 10 May 2004, 23:32
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by lexan</i>
Cheers Jonathan. I'll check that valve first as you suggest. I serviced the engine when I got it as it had been obviously neglected. The inside of the fuel filter housing was full of bits so it wouldn't surprise me if the pump had worn out. Having said that the engine runs well and doesn't make any unusual noises so I'll cross my fingers and hope its just the seal.........!
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
Cool. Incidentally, the other main symptom of the problem is an uneven idle. IMHO the Bosch pump is far superior, sadly my BX doesn't have one either...
Good luck.
Cheers Jonathan. I'll check that valve first as you suggest. I serviced the engine when I got it as it had been obviously neglected. The inside of the fuel filter housing was full of bits so it wouldn't surprise me if the pump had worn out. Having said that the engine runs well and doesn't make any unusual noises so I'll cross my fingers and hope its just the seal.........!
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
Cool. Incidentally, the other main symptom of the problem is an uneven idle. IMHO the Bosch pump is far superior, sadly my BX doesn't have one either...
Good luck.
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lexan
- Posts: 9
- Joined: 06 Jan 2005, 01:04
Jonathan - thanks again - I checked the pressure relief valve its ok. I went to a lucas dealer and got an overhaul kit hich contains loads of parts. The staff there reckoned 9 out of 10 only need the throttle shaft seal to cure it, but some need the throttle shaft as well. I think from the way it runs (idle is perfect) I should get away with the seal only. I'll stick a post on here when I've done the job.
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lexan
- Posts: 9
- Joined: 06 Jan 2005, 01:04
New seals fitted today - took 30 minutes. As promised heres how its done as I'm sure this will be relavent to any peugeot or citroen with an XUD Diesel engine which has the Lucas/CAV, Roto diesel pump.
First put a tray under the vehicle below the pump to catch all the diesel which will come out (I didn't do this !).
Next mark the position of the throttle lever and the cold start lever in relation to the pump top and make note of how the springs fit to these arms. undo the 17mm banjo connection for the fuel return pipe, move this out of the way. remove the 10mm nuts which secure the 2 arms, remove the arms noting how they fit etc. Remove the 4 small torx bolts and take the top off the pump - this is where you'll lose a good amount of fuel. Push the throttle shaft down and out of the lid as you pull the lid off. There are 2 "O" rings on the shaft - replace these with 2 new ones from the repair kit. My old seals broke off they were so hard and brittle. Put it back together (I Know this sounds like Haynes but it is just a straight reverse of taking it apart). Start it up and check for leaks.
To protect the insde of the pump from debris I degreased the outside of the pump first thoroughly to prevent any dirt falling inside.
Job done for £6.00 and 30 minutes work. No leak and the throttle pedal also feels smoother in operation than it did - it always felt very stiff before.
First put a tray under the vehicle below the pump to catch all the diesel which will come out (I didn't do this !).
Next mark the position of the throttle lever and the cold start lever in relation to the pump top and make note of how the springs fit to these arms. undo the 17mm banjo connection for the fuel return pipe, move this out of the way. remove the 10mm nuts which secure the 2 arms, remove the arms noting how they fit etc. Remove the 4 small torx bolts and take the top off the pump - this is where you'll lose a good amount of fuel. Push the throttle shaft down and out of the lid as you pull the lid off. There are 2 "O" rings on the shaft - replace these with 2 new ones from the repair kit. My old seals broke off they were so hard and brittle. Put it back together (I Know this sounds like Haynes but it is just a straight reverse of taking it apart). Start it up and check for leaks.
To protect the insde of the pump from debris I degreased the outside of the pump first thoroughly to prevent any dirt falling inside.
Job done for £6.00 and 30 minutes work. No leak and the throttle pedal also feels smoother in operation than it did - it always felt very stiff before.