94 Clio 1.9D - Leaking injection pump

The diesel injection pump on my wife's Clio has developed a leak. When the engine is running it comes out quite quickly - about a drop every second.

The pump is a Roto-Diesel/Lucas type. The fuel is coming out at the join between the main body and the part at the back end which carries the fuel inlet, stop solenoid and injector ports. There are no leaks at any of these connections.

The Haynes manual offers little guidance other than saying any work on the pump should be left to the specialists. The manual does contain a cutaway drawing which seems to indicate that there is an annular seal where the 'distributor' part goes into the main body. I guess this seal must be the main suspect at the moment. Maybe another possibility is a fracture in one of the parts.

It looks to me as though the rear part might be removed fairly easily after removing the inlet connection and injector pipes, leaving the main body in situ. Can anyone tell me if I would come across any nasty surprises (e.g. small pieces flying apart to all corners of my garage, or special tools to re-assemble)? I'm aware of the need for strict cleanliness when dismantling diesel injection components.

If it's a feasible DIY proposition to replace the seal (if this is indeed the cause) I would much prefer to do this than getting an exchange/reconditioned pump (how much?) and having to do all the re-installation and timing setup, not to mention the timing belt removal and refitting, which is a bit of a fiddly job on the Clio.

How readily available are injector pump spare parts - the aforementioned seal for example?

TIA for any helpful advice,

Peter

Reply to
Peter
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NOOOOOOO, what ever you do dont take the pump appart, the cut away in the haynes manual is very very very veyr basic, there are about 2 million springs, ball bearings, spring loaded pistons etc inside the pump, quite a lot could well fly out when you take the pump head off, and if you do, you must do it in a clean room, the slightest speck of dirt, grease or grit that gets inside the pump will bugger it up in no time.

you'll also need some specialist tools to get the pump head appart to get to the seal, and specialist knowlage on how to re-assemble it all afterwards, then you need to run it up on a test bed and set everything up again.

if you can take the pump off your self, then get it down to a diesel specialist like C.F.Parkinsons,

they charge me £100 to re-calibrate a pump if i bring it to them, that will include replacing any minor seals that go during testing (if ones gone, others usually follow, throttle spindle will likely be next)

i had my throttle spindle assembly totaly re-built, new bushes, shaft, seals throughout the whole pump and so on, that ment the whole pump had to be striped down, everything re-placed and re-built, then it spent a couple of hours on the test bed being re-calibrated,

my bill for that was £150 plus vat.

any you get back a pump that runs like new.. while you have the pump off, whip the injectors out and have them tested, they'll test them for free, and quote you for any work needed to bring them upto scratch, prolly discounting it as your having hte pump done at hte same time,

then you'll have an injection system that's running like it did when the car was new, so could well see an increase in power and get a bit better fuel economy.

Reply to
CampinGazz

Yes, thanks for that. I've now seen a similar pump in pieces and what you say is only slight exaggeration (not quite two million).

I'm taking the pump off myself and getting it reconditioned. I'll follow up your tip about the injectors.

Peter

Reply to
Peter

The O rings which seal the rotor body to the housing have died. However fixing that involves completely dismantling, rebuilding & restting the pump, way outside of DIY (I wouldn't do it myself & I've built hundreds of them).

Reply to
Duncan Wood

As I've discovered. The pump's with a specialist now for reconditioning. It was weeping slightly at the throttle spindle too.

Peter

Reply to
Peter

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