My name is David and I use veg oil

[230K]

Hi

From the look at the video it is either the o ring on your stop solenoid or some of the pipes leaking on the stop solenoid.

Pipes are not very expensive about £5 ea from memory o ring on sto solenoid is pence.

I would replace your pipes and o ring on stopper and that should sort you.


Good Luck

230K

 

[Parrot of Doom]

Looked like the fuel shutoff valve spurting diesel out the side?

Your delivery valves also looked a bit damp, the 6 metal lines on top of the pump - might be worth getting those done as well, if you're not doing it yourself that is.

 

[Tontastic]

Independent says that the seals on the pump are knackered. Cost of a new pump from Merc will be in the order of 2 grand. Someone. Anyone. Please. Give me hope of a temporary fix, a much cheaper fix, a cheap source of second hand pumps, anything! Can I gung it up with blue tack and take it to arnold clark for a trade in??????

 

[Parrot of Doom]

You don't need a new pump. They're very robust.

There is an o-ring between the shutoff valve and the fuel pump, it costs pence, and is very easy to replace. You could start with that. You need the correct torque driver to remove the shutoff valve (2 bolts, remove the windscreen washer bottle for better access). Remove the valve and you'll see the o-ring, IIRC its about a centimetre in diameter.

You could also replace the fuel lines, best to do them all together, again its a pretty easy DIY job, although they can be buggers to get out once they've been in there a few years. Push the horseshoe clips in to release.


Instead of a video, can you post some good quality photographs of the leak? If you can't capture the leak, just take a picture of the area and describe the point where the diesel is leaking from.

 

[Tontastic]

You don't need a new pump. They're very robust.

There is an o-ring between the shutoff valve and the fuel pump, it costs pence, and is very easy to replace. You could start with that. You need the correct torque driver to remove the shutoff valve (2 bolts, remove the windscreen washer bottle for better access). Remove the valve and you'll see the o-ring, IIRC its about a centimetre in diameter.

You could also replace the fuel lines, best to do them all together, again its a pretty easy DIY job, although they can be buggers to get out once they've been in there a few years. Push the horseshoe clips in to release.


Instead of a video, can you post some good quality photographs of the leak? If you can't capture the leak, just take a picture of the area and describe the point where the diesel is leaking from.

I will do my best to do so ... thanks for the advice. I've had a quote of just over £260 for a fuel pump 2nd hand off of t'internet ... so its looking so far like a £500 repair if i can't get a repair rather than a replace as the independent says "about" 250 to fit a part that i source.

 

[Parrot of Doom]

Thats £260 for a pump, or £0.26 for an O-ring.

Not a difficult choice

Plenty of people here have done the shutoff valve o-ring, its very easy. If you need any advice please ask, but basically you'll need:

Torque driver (sorry I can't remember which, just buy a set of them)
Small mirror (its a tight space, the mirror will help you see where things are)
O-ring (buy one from the dealer)
Sockets/spanners to remove the washer bottle (takes 2 minutes)

And the usual pliers, screwdrivers, and other useful stuff. Take care when the valve is off that you don't drop anything into the pump - it would be very hard to do so, but the o-ring can be cracked and decayed, you don't want a bit of rubber falling in there. Just gingerly pull the valve out, if the o-ring stays in the pump then use a long thin screwdriver to gently ease it back out.

The fuel lines are dead easy, you just push the horseshoe clip in, and pull the line off. They're stiff so might take a bit of time, but putting the new ones back on will be very easy indeed. Just push them on, and pull the horseshoe clip out (not all the way, you'll feel it click and thats where it should be).

Best to do all the fuel lines, if you haven't already done them they'll go sooner or later, and as you'll be stopping a leak in one area that will increase the pressure on other areas, and they'll start weeping one by one.

If you want to remove the electrical connector on the side of the shutoff valve, it just pulls out. Be careful if you do so, not to bend the pins in the socket.

Trust me, if you take things nice and steady, you'll be fine.

 

[Dosco]

"I will do my best to do so ... thanks for the advice. I've had a quote of just over £260 for a fuel pump 2nd hand off of t'internet ... so its looking so far like a £500 repair if i can't get a repair rather than a replace as the independent says "about" 250 to fit a part that i source."

I understand your reluctance to give it a go but Parrots instructions are always very clear and if he says it is easy then it will be, if you follow them you can save a whole bag of bucks.

 

[Tontastic]

Had a bit of a look ... took your advice and removed the washer bottles. When head is looking in from where the bottles were, you can see that the leak is coming from a plate underneath the solenoid (plate size 6 inches x 2 inches?) Question is ... is the gasket under this plate easily replaced? Or given that it is not shown on the .ru site is it not an option.

I thought it has stopped for a while to be honest, drove about 30 minutes on the motorway to get where i was going before taking a look, and there was no sign, but after a while it started again.

http://www.detali.ru/cat/oem_mb2.as...GA=722.608&CT=M&cat=19T&SID=07&SGR=045&SGN=01

i tried to take a picture, will upload later if it is clear enough to describe from it.

 

[Tontastic]

Had a bit of a look ... took your advice and removed the washer bottles. When head is looking in from where the bottles were, you can see that the leak is coming from a plate underneath the solenoid (plate size 6 inches x 2 inches?) Question is ... is the gasket under this plate easily replaced? Or given that it is not shown on the .ru site is it not an option.

I thought it has stopped for a while to be honest, drove about 30 minutes on the motorway to get where i was going before taking a look, and there was no sign, but after a while it started again.

http://www.detali.ru/cat/oem_mb2.as...GA=722.608&CT=M&cat=19T&SID=07&SGR=045&SGN=01

i tried to take a picture, will upload later if it is clear enough to describe from it.

Attached picture shows the plate that appears to be the source of the problem. i've tried to outline the plate in red. There appears to be several parts of this plate that appear to be leaking, as under the solenoid and right along to the right hand side are oozing/dripping.

So back to my request to the knowledgeable ... what is behind the plate, and is it serviceable?

 

[Parrot of Doom]

Hmm, never heard of a leak from there. No idea what's behind it, but its not unreasonable to presume that perhaps its some kind of access panel, with a gasket, and the gasket is on it's way out.

Looking at the diagrams, if you look at the bottom image thats your pump. That panel is visible, and there is a gasket shown (lateral gasket), and a seal ring (bottom).

I'd take a running guess that you need to get yourself that gasket (152), it even has the 4 bolt holes that the panel is secured with.

The o-ring for the shutoff valve is item 14.

 

[Tontastic]

Update ...

I'm following two lines of enquiry now ...

One is to get the gasket (152) take off that panel and replace ... the other is to purchase a replacement pump.

If anyone has ever taken off that panel before and replaced the gasket then i would really like to hear from you ... looking at the pictures on the .ru web site, i ain't convinced that is the gasket. The top figure shows that it has 5 screws/bolts securing it ... including one in the centre at the top, which are not shown on the gasket. The bottom of the gasket also appears to have the bolts placed about a fifth of the way in from either side, while the plate's bolts are not in that location. I was thinking that those drawings would be spot on ... so the discrepancy worries me.

On the second avenue the part i can buy *relatively* cheaply is as attached ... which looks like it is missing the shut off valve and stop solenoid. I am sure that I could have them transferred from my own pump, although I would be slightly nervous that they are damaged as well. Not very nervous, since they appeared not to be damp, but i am trying to be cautious where before i was hasty.

Can anyone with eagle eyes spot any other discrepancies that might bite me?

 

[Parrot of Doom]

All thats wrong with your pump is a seal has gone. That much you know.

What do you know about the second hand pump?

 

[Tontastic]

All thats wrong with your pump is a seal has gone. That much you know.

What do you know about the second hand pump?

I hear you Parrot, I hear you. Can you understand my concern though that the seal on that diagram does not appear to match the screw layout on the plate?

 

[Parrot of Doom]

It was only a guess, but really you're going to have to bite the bullet and remove that plate to see what's up.

I think the pump is made by Bosch, well they should be able to supply parts for it even if Mercedes can't. Perhaps you could make enquiries with Bosch automotive to see if they can help you out.

http://www.boschautoparts.co.uk/

The other thing is that the plate might just be cosmetic, there could be servicable components inside that need fixing. Of course that would very likely need a specialist. I wonder if anyone here knows a good outfit for reconditioning Bosch pumps, perhaps you could send it to Bosch on that website?

 

[Tontastic]

The quest for a cheap fuel pump has turned one up for £100. And that is with the solenoid and injector attached. Certified as working fine when removed from wrecked car. If the gasket on the plate problem doesn't fix it, looks like the £2000 from mercedes for the part has been trumped.

 

[Tontastic]

I *hope* that is that fixed ... drove back with no problem from the garage, and no signs of leaks ... i got the old leaking pump back, and its in the garage. If anyone wants to mess with it let me know and i can get it to you.