 | Home > Puma (Tdci) > Puma fuel bleeding pump |
 
|
|
|
Looks like further investigation required of the fuel system now 
| Bluest Member Since: 23 Apr 2016 Location: Lancashire Posts: 4206   
|
How do you stop air being reintroduced when you disconnect the kit? 2007 110 TDCi Station Wagon XS
|
||
16th Nov 2018 7:52am |
|
| HardCharger Member Since: 03 Mar 2013 Location: Manila Posts: 731  
|
Once you run the engine and do not find any bubbles in the lines anymore the diesel stream should be secure and since the kit is one way with a check valve, there will be no vacuum back flow. When you disconnect the kit, the fuel should still be in the lines and when you connect the fittings properly again, there should be minimal to no air gaps.
At least this is how I understand it. |
||
|
16th Nov 2018 7:57am |
|
| MartinK Member Since: 02 Mar 2011 Location: Silverdale (Lancashire/Cumbria Border) Posts: 2665 
|
I only connected the end towards the tank... When I pumped, I pumped into a 1 litre container and kept pumping until the fuel came out clear of bubbles. Took a while after a filter change (I didn;t prime the filter).
Then a quick reconnect and all good! I think the system can handle small amounts of air, just not an empty fuel filter!!! I did not connect the engine end at all, just left it open until I had purged the air from the tank end... Maybe worth trying? Defender "Puma" 2.4 110 County Utility (possibly the last of the 2.4's) |
||
|
16th Nov 2018 8:56am |
|
| HardCharger Member Since: 03 Mar 2013 Location: Manila Posts: 731
|
I actually thought about that and tried it, but sadly, it yielded no results. There must be something else introducing air into the system making it impossible to start the syphon effect that will feed the system.
Asides from the pick up and floater unit, it has been brought to my attention that there is another breather pipe on the other side of the vehicle that kind of resembles the breather unit near the filler neck. Since the one near the filler neck can fail and considering what the valve has been through, being submerged in mucky flood water and all, it is possible that this valve may have died in a way that fouls the pressure of the system. If this is the case, it will be a cheaper and somewhat easier fix.  Now, when I find it, how to test it to figure out if it's dead or not? Someone mentioned blowing air into it but what should be the reaction I will expect to determine whether it's dead or not? |
||
|
16th Nov 2018 9:49am |
|
| MartinK Member Since: 02 Mar 2011 Location: Silverdale (Lancashire/Cumbria Border) Posts: 2665
|
Aha - so the Defender wasn;t running properly when you started? I assumed you had just changed the fuel filter...
maybe this thread is of use: https://www.defender2.net/forum/topic22296.html Defender "Puma" 2.4 110 County Utility (possibly the last of the 2.4's) |
||
|
16th Nov 2018 9:53am |
|
| HardCharger Member Since: 03 Mar 2013 Location: Manila Posts: 731
|
He wasn't running at all since mid July when he drowned in flood water that went as high as half way up the vehicle. So the fuel system had to be drained and purged but the diesel / flood water mixture was in the system for a few days before they could actually do the purge.
|
||
|
16th Nov 2018 9:59am |
|
| MartinK Member Since: 02 Mar 2011 Location: Silverdale (Lancashire/Cumbria Border) Posts: 2665
|
If there's diesel in the tank, but the priming tool is not pulling it thru, then I suggest either (1) the priming tools not working, or (2) there's an air leak in the system between tank and engine bay.... Defender "Puma" 2.4 110 County Utility (possibly the last of the 2.4's)
|
||
|
16th Nov 2018 2:28pm |
|
| Roger Member Since: 26 Apr 2018 Location: Hampshire Posts: 71 
|
Bluest, I got exactly that issue. Thinking I had properly bled the system, started up the rover only to hear it die after about a minute achieving nothing more than emptying the common fuel rail as well as the fuel pump! 
As the tank was nearly empty (to limit fuel loss if everything went wrong!) I think after 'priming', fuel was running back down the 'primed' fuel line to the filter/tank while I took my sweet time fiddling about with the connectors! In the end I sorted it out by using a set of fuel hose clamps to keep the fuel line primed while reconnecting everything. Interestingly given the cost of the genuine (and even aftermarket) bleed tools, I used this set up, costing less than £20 from the local halfrauds: Click image to enlarge The brake bleed kit was entirely sacrificial as the clear hose push fits really nicely into the 5/16" fuel hose and allows you to actually see the fuel is clear of bubbles! Instead of connecting exactly where the workshop manual suggests (female end of below pic) I went one connection further from the fuel pump (male end of the below pic) to the connector with the green valve cap. Click image to enlarge The clear hose from the brake bleed kit pushes perfectly inside the male connector as is and with electrical tape around it at the other end, seals into the corresponding female part nicely. As the fuel bulb pump is useless with air and needs to be primed to work (not particularly helpful) I connected up to the fuel line from the filter/tank and left the other end open so that I could press a thumb over the end while the bulb pump was drawing. Once the system was primed to my thumb I used the fuel hose clamp to keep it that way while I pushed the clear plastic hose inside the male connector leading to the fuel pump. Once I had pumped enough to prime the pump I used the fuel hose clamp on the filter/tank side of the female connector to prevent fuel running back to the tank, disconnected the bleed set and reconnected the fuel line with a very minimal air pocket. So that I wasn't pushing too much air through the common fuel rail I also disconnected the yellow fuel line on top of the block from the fuel return after the fuel rail (the 5/16" fuel hose push fits nicely onto the male connector). This I tried to bleed to the atmosphere but I'm not sure how successful it was as I seemed to end up just drawing a vacuum (possibly there is too much resistance in the fuel pump to pull the fuel through from downstream and you can only push it through from upstream). Took a bit of time turning over then fired back into life but the main success was that the solution was found for circa£20 all in without having to source any connectors  |
||
|
13th Jan 2019 1:06pm |
|
| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 52  
|
Hey Guys.... 1st time post as I've only recently purchased a '09 Puma 110 and I want to become familiar in changing fuel filter.
I'm yet to replace the fuel filter myself but I was wondering what the green cap/connection is for? I realise that there is some type of valve in there but can u someway utilise this to prime the fuel system? The valve looks similar to a tyre valve and was wondering if the valve screws out like a tyre valve? (sorry if I've got this totally wrong but I am just curious as to what this is really for?) Click image to enlarge |
||
|
15th Jan 2019 3:31pm |
|
| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 52
|
Any ideas what the green cap is for?
Click image to enlarge Cheers..... Rob 1995 Defender Tdi 110Wgn 1996 LR Discovery Tdi300 (A) 2009 Defender PUMA 110Wgn My TRPS: Rob's WikiLoc Trips |
||
|
26th Apr 2019 6:16am |
|
| MartinK Member Since: 02 Mar 2011 Location: Silverdale (Lancashire/Cumbria Border) Posts: 2665
|
I don;t recall seeing a connector like that - what's it on??? Defender "Puma" 2.4 110 County Utility (possibly the last of the 2.4's)
|
||
|
26th Apr 2019 7:21am |
|
| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
has your fuel filter head been modded with priming pump and green cap/valve fitted at engine end fuel system to bleed air out
 then changing fuel filter |
||
|
26th Apr 2019 9:32am |
|
| bos Member Since: 11 Feb 2016 Location: Dolenje jezero Posts: 9  
|
0,2 bar air throu breather pipe, afer 0,5 lit desel throu sistem, no more air
|
||
|
12th May 2019 10:02am |
|
| RobM Member Since: 06 Jul 2015 Location: Brisbane Posts: 52
|
That Green Cap came standard here in Australia so I'm lead to believe? Cheers..... Rob 1995 Defender Tdi 110Wgn 1996 LR Discovery Tdi300 (A) 2009 Defender PUMA 110Wgn My TRPS: Rob's WikiLoc Trips |
||
|
12th May 2019 10:49am |
|
|
|
| All times are GMT |
< Previous Topic | Next Topic > |
Posting Rules
|
Site Copyright © 2006-2024 Futuranet Ltd & Martin Lewis
