So while I would consider this subject as part of my quest to establish the reason for the lack of performance on Gen 4.1's (versus Gen3's) I thought it might be beneficial to all to post this seperately.
I did a lot of web searching and could not find clear information as to what exactly was fitted to the Gen 4.1 tank and besides satisfying my curiosity I felt a bit of preventive maintenance could only be a good thing. There is no electric pump whatsoever in the tank. The fuel pump on the engine draws the fuel from the tank through the filter on the firewall to the high pressure pump down below the battery mounted on the engine. A long way which is why my curiosity / concern.
So out came the drivers seat (and a good opportunity to clean under there) and directly under the drivers seat, under the carpet, is a cover for the gauge sender unit - no need to go there. The second cover is under the carpet at the feet of the rear passenger behind the driver. It helps to loosen off the lower drivers seat belt mounting. Then it takes a bit of wrestling to get the carpet out from under the "tupperware". Once you have the carpet pulled back and the cover off you will find 2 x pipes going into a cover attached to the top of the diesel tank. Remove the pipes (delivery & return) plus the cover and lift the system out. There is a pipe that goes from the bottom / foot of the unit to the top of the inside of the tank. Remove from the foot of the unit. Looking into the tank with a torch there is a type of protective dish that the tank unit sits inside of. I found about a teaspoon of "crud" which I siphoned out. The rest of the tank was spotless. The tank unit has a filter at its base.
This filter was a little bit dirty but nothing that would have been a problem. A wash in some petrol got it clean quickly. Now what was interesting was opening this filter (white plastic "jobbie" with clips revealed a strange type of valve inside. This valve was obviously no longer working as it should, as it had come appart. A bit disappointing.
Now that I knew what mine looked like I went back to the web and found that others had also found their "valve" non opperational / fallen apart. Comment on the web was that this "valve" improved performance. I doubt it. It is probably something like to draw fuel from the higher fuel level while the level is high and from the bottom only once the level is low (well looking at the design etc., that was my logic). I see you can buy new ones on e-bay, Anyway I needed my vehicle operational and doubt that a new one would last any length of time (a bit gimicky / junky / poorly made for Pajero) so I just left all the loose bits out (float, spring, rubber) . I do not think that anything about the loose components would make the vehicle unreliable. I just had it apart and simply left the bits out with the filter back in its original position. So now I will be drawing fuel from the bottom of the tank irrespective of fuel level. Now I (and you too) know what it looks like down there !!!!!
So I put it all back together and every thing works great.
I have since made / found some new information with regard to the performance issues which I will be posting soon.
Gen4.1 in-tank diesel filter
- peterpot
- Country: SA
- Vehicle: 2009 Pajero 3.2 SWB
- Location: Pretoria
- CATS
- Contact:
- Vehicle: 2001(Gen3) Pajero 3.2 Did, 2008(Gen4) Pajero Did
- Location: Centurion
Post
Re: Gen4.1 in-tank diesel filter
Thanks Peter
Always good to have someone on the forum that has too much idle time on his hands
Now we all know and won't be digging up the same.
CATS
Sent from my LG-H815 using Tapatalk
Always good to have someone on the forum that has too much idle time on his hands
Now we all know and won't be digging up the same.
CATS
Sent from my LG-H815 using Tapatalk