Diesel pump leaking

tone depear · Post by **tone depear** » 25 Apr 2005, 01:14

Hiya folks
Hoping someone can help me out with this. I've just got to work (nightshift [xx(] ) and there's diesel seeping out of the top of what I take to be the fuel pump. The car is a 95 1.9d (non turbo). The fuel is actually leaking from what looks to be a sender/sensor of some sort, which looks like a 22ml threaded socket stuck into the top of the pump assembly with 2 wires going off it. It's on the side nearest the centre of the car, and it says rotodiesel 12v on it. The leak is seeping through the gap where the plastic core meets the outer metal shell. I've not got any manuals with me, and I'm keen to work out what I can do to fix it whilst I'm kicking my heels at work for 12 hours!
Any advice would be greatly appreciated. My current plan is, halfrauds in the morning and just seal it up with chemical metal/sealant of some sort.
As I say, any advice would be appreciated. I don't even know what the bloody thing is!
Cheers
Tone

tone depear · Post by **tone depear** » 25 Apr 2005, 01:23

Scuse the dodgy nokia-image!
The problem bit is the green plastic jobby in the top right of the picture. Hope this helps at least identify what it is!

Thanks again
Tone

Kowalski · Post by **Kowalski** » 25 Apr 2005, 01:46

Is that the stop solenoid?

fastandfurryous · Post by **fastandfurryous** » 25 Apr 2005, 02:03

It is. There's a small o-ring to seal it. Surprising really, as these very rarely leak. Get a new stop-solenoid o-ring, Remove, change the o-ring and re-fit.
I wouldn't use any kind of goop sealant on this, as anything that gets in here will end up in the high-pressure side of the injection pump, and cause havoc.

tone depear · Post by **tone depear** » 25 Apr 2005, 02:06

Hurrah! Give me your addresses and I shall send you my first and second borns respectively.
That's tomorrow morning sorted. And she'll be frugal again in no time!

fastandfurryous · Post by **fastandfurryous** » 25 Apr 2005, 02:30

ah... Right.... I've just re-read the original post, and I'm wrong. The o-ring won't fix it. If it's leaking between the plastic core and the outer metal bit, then the solenoid has broken up internally. The only permanent fix for this is a replacement solenoid. These aren't expensive, but are probably only available from a main dealer. Either that, or pull one of a scrapper car. Don't loose the slug of metal or the spring inside the solenoid. Otherwise, as before, just remove the electrical connection, unscrew the solenoid, screw in the new one (with it's o-ring in place![:D]) and re-make the electrical connection. Prime the diesel system a bit, and see if it starts.
If it won't start, then the electrical connection is bad. If it starts and won't stop again when you turn it off, then the rubber seal on the end of the slug of metal in the solenoid isn't sealing properly. If this happens, the emergency stop lever is on the left-hand side of the injection pump, just off the left of your photo.
David.

davek-uk · Post by **davek-uk** » 25 Apr 2005, 14:40

I had the same problem on my AX. The stop solenoid leaked inside and was letting fuel out from between the green plastic and the crimping. Stop solenoids are available at any diesel specialist - I replaced mine at Lucas (LSUK), around £30. They said this is a fairly regular failing with age and replacement is the only option.

jeremy · Post by **jeremy** » 25 Apr 2005, 20:50

As a matter of interest my local accessory shop sells stop solenoids. They are in someones display system of parts in simple plastic bags with yellow cardboard tops with red print. I think the price is about £20.
jeremy