Suzuki Vitara Injection Pump?

[greasemonkey]

Does anyone happen to know what injection pump is on a 1996 suzuki vitara 2.0L Td?
It is the Mazda RF engine.

There is a fuel leak att he back of the pump. There is a couple of different places it could be coming out, but I can't actually see the back of the pump, while it is running. If I take the battery off, I can see it clearly, but obviously then, the engine is stopped, and the fuel doesn't come out.

There is one bolt that is the most likely suspect, but I don't really want to pull it out, then find out that it won't go back in, because something has dropped off inside.

If I knew what pump it was, I could possibly find an exploded diagram.

[Tony]

Got a photo of the pump?

[greasemonkey]

It appears to be a Denso. It's so covered in frilly bits, you can barely see the thing anyway.

The fuel is dripping out at the back. It's not the injector pipes, nor the pipes they screw into, nor the bolt that goes in the middle of the injector pipes.

Are these pumps prone to leaking somewhere?
Just studying some exploded diagrams for ideas.

[Tony]

They can leak there, it's just the cover for the high pressure plunger where you can screw in a dial-gauge.  Probably got a little copper crush ring that's leaking.

[greasemonkey]

I don't think it's that copper ring. I've had it off, and can actually get a visual to it. I've even PTFE taped it now.

The fuel seems coming out between the main of the pump, and the block on the end, that the injector pipes screw into. The piece labelled "Distributor" on this diagram.

http://www.autospeed.com/cms/gallery/article.html?slideshow=0&a=109344&i=5

It's soaking with fuel by there, and when I put my hand there, it's trickling down my hand like a good 'un.



O ring gone, I guess.
So, can I just whip this off, change the O rings, and plonk it back on, without messing up anything critical?
Mines got screws holding this lump on, not nuts, as shown in the diagram. Should it be possible to do it in-situ, or are the screw very definitely an impact driver job?

[Tony]

My Bosch one took an impact driver to remove the bolts holding the high pressure distributor to the body of the engine.  Your pump may be different though?
Certainly if you were careful not to lose the plunger return springs I can see it being replaceable in situ.  I've seen one done where the high pressure part was only slightly separated, enough to extract the o-ring, and a new one stretched over the top to drop in and replace it.

[greasemonkey]

That sounds like a cunning plan.
There looks to be one allen bolt, one hex bolt, and two screws holding it together. Must have been using up some spare fixings that day.
I think I might just whip the thing off anyhow. The 10 days for the re test runs out tomorrow, and it ain't gonna get fixed, nor anytime soon.
Been leaving home at half six in the morning and getting back at nine at night most last week, and got pretty much the same lined up for next week, so it'll jut have to wait.
Not a happy bunny at the moment. Roll on winter........

[julesandtash]

I took a Bosch VE apart a few weeks ago, which means I have some photos for you.

Here is the O ring which will be leaking, it sits in a groove on the iron high pressure part of the pump (the bit the injector pipes connect to via the delivery valves)..



This is the rear end of the main body of the pump, showing the threaded holes that those four fixings screw into and hold the iron bit to the aluminium bit.

[greasemonkey]

That's outstanding. Thanks for that.
Is that O ring round or square section?
There is an O ring kit here somewhere, but it's looking to me like I'd be better off buying the correct part, rather than making one. Bit too much work to have it fail, maybe.
It looks pretty thick any way, I'll see what is in the kit.
I'm half thinking I may as well pull the pump off, it could do with a timing belt really. do it all in one.

[julesandtash]

It is a flat, rectangular section.
3mm X 2mm X 70mm diameter approximately (measuring with a ruler)

[greasemonkey]

Don't worry about it, I think I might try and get my paws on a rebuild kit. I'm pretty certain there is no square section in the O ring kit.
I feel a lot more confident now, seeing how it comes apart.
Thanks again, most helpful.