Eberspacher fitting problems...fuel supply

[MrU]

Hi guys,

Hoping for some advice since trying to fit my Eberspacher D2.

Have adjusted the bracket suitably with my angle grinder it is now sat under the passnger seat like many others on here.I decided to insert a T piece in to the fuel line for my supply. This is sleeved down to a tiny pipe (supplied with my heater). This is where my problems start.

I inserted the T-piece in the pipe (under the drivers seat there are two fuel pipes one of which is a return I believe. I chose the top one which runs to the diesel filter. I am convinced this is the right one but in the interest of eliminating all possibilities thought I should check). Following the problems below I discounted the pump and had a good suck on the pipe which produced a nice mouthful of diesel.

All connected up and I can't get the fuel pump to prime at all (been trying for 2 days and ready to set fire to the Bongo at the moment!!). I wired a push switch directly to the pump allowing me to pulse power as per lots of advice on the web but I am only getting the tiniest bits of diesel through (basically the pipe must still be 99% air). After more reading on here I believe my pump may not be mounted in the correct place or have enough umph to pull the diesel through.

Currently the spur from the T-piece is vertical and the pump is higher that the fuel line the T-piece is inserted into. This makes me think that the pump doesn't have enough power to start the process. Should I mount the pump lower than the T-piece and if so any good suggestions where?

I understand the run from the pump to the heater should be constantly on an upward slope against to help with priming. How have you all routed the pipes and is plastic pipe okay (I got a load supplied with my heater) or should I use copper?

Does anyone have pictures of where they have mounted their pumps or any hints for priming? I am tempted just to take it to a professional but I want to ensure I have tried everything first (personal pride is very much at stake)!!

Thanks very much.

[Alison01326]

I have absolutely no idea at all where mine is, as it was professionally installed. I wouldn't even know where to look to take photographs I do know, however, that the company who installed mine said they do not use a T piece. It's a Webasto, but I'm sure installation is the same.

[dandywarhol]

Tee piece here and pointing downwards, make sure the pipes being joined have no gap between then for air to be trapped i.e. the plastic pipe abuts the tee.



I then ran the plastic pipe down and inside the (lower) engine cover and mounted the pump at an incline in the left side of the engine cover, again making sure there's no air gap between joining pipes. I left the pipe off the heater and turned it on, it went through its startup routine and the pump pished out fuel and air. I then connected the pipe to the heater before the start sequence shut down - jobs a carrot!

[MrU]

Thanks for the info above guys and an update.

I couldn't get it out of my head that the T-piece facing up wasn't the problem so dashed home from work, loosened the pipes and turned it round so it was pointing down. Loosely hung the fuel pump in its new position. A quick bleed and you could see it was much better. Fixed onto the heater and turned it on and it all worked straight away with some lovely hot air. Now just need to install it permanently with new exhaust/vents etc. and we are away.

It turns out in the manual it states that the T-piece has a maximum deviation of 60 degress from directly downwards.

Woohoo!!!

[dandywarhol]

[Simon Jones]

I had a similar problem when I fitted mine & ended up using a bicycle pump to suck fuel thru the pipework to the pump just to prime it & get the air out. Much better than a mouthful of diesel

[MrU]

I had a similar problem when I fitted mine & ended up using a bicycle pump to suck fuel thru the pipework to the pump just to prime it & get the air out. Much better than a mouthful of diesel

I just made a small loom with a push switch in it then connected the fuel pump directly to this. This allowed me to pulse the pump without throwning an error on the Eberspacher.

I primed for hours with no results yet as soon as I turned the Tee piece around as described above it bleed in about 20/30 clicks.

The mouthfull of diesel wasn't very nice....its just a good job I have recently given up smoking!