Fuel System Questions

[Banshee]

Firstly if I'm honest, I think that the swirl chamber that is fitted onto the pickup lines is a terrible idea, restrictive and harbours debris. If I remember correctly I'm sure Panelbeater removed his swirl chamber and just left the pickup pipes inside the fuel tank. I've removed my chamber recently however I've noticed that the pipes will sit a fair way from the bottom of the tank, I've decided that I'm going to attach some fuel pipe to the lines and leave them lying across the bottom of the tank. Has anyone else done this?

My Inspection hatch to access the fuel tank was fairly easy to remove, as we all know, the bolts that hold the retaining plate onto the top of the tank are known for snapping off however all of mine came out beautifully :clap apart from one which I've rounded the head off however it did come out clean, they are pretty funky bolts and I'm wondering what I can use to replace them as I'd like to renew them all with a bit of copper slip on them so they stay nice.

Last question, what's the chances of my 04 having a banjo/mini filter? I know there is a lot of controversy about this one, just wondering if any of the guys with 04 motors onwards have checked and removed if they were present

Thanks Guys

 

[rayf3262]

IIRC the bolts are M6, so replace them with some A2 stainless, like these:
http://www.screwfix.com/p/socket-button-screws-a2-stainless-steel-m6-x-12mm-pack-of-50/40975?kpid=40975&cm_mmc=Google-_-Product%20Listing%20Ads-_-Sales%20Tracking-_-sales%20tracking%20url&kpid=40975&cm_mmc=Google-_-Shopping%20-%20Fixings%20and%20Fasteners-_-Shopping%20-%20Fixings%20and%20Fasteners&gclid=CMaLs-Kg1cICFfQatAodalYAkA

 

[Banshee]

IIRC the bolts are M6, so replace them with some A2 stainless, like these:
http://www.screwfix.com/p/socket-button-screws-a2-stainless-steel-m6-x-12mm-pack-of-50/40975?kpid=40975&cm_mmc=Google-_-Product%20Listing%20Ads-_-Sales%20Tracking-_-sales%20tracking%20url&kpid=40975&cm_mmc=Google-_-Shopping%20-%20Fixings%20and%20Fasteners-_-Shopping%20-%20Fixings%20and%20Fasteners&gclid=CMaLs-Kg1cICFfQatAodalYAkA

Ray, thanks for that, I'll grab some of those tomorrow :thumb2

Where have we got with the Consult Plug, have you had chance to investigate it any further?

 

[rayf3262]

Ray, thanks for that, I'll grab some of those tomorrow :thumb2
Check the length though, may need 20mm or so? I habitually replace the Nissan made of cheese bolts with these!

Where have we got with the Consult Plug, have you had chance to investigate it any further?
Forgot all about it! I'll take some pics as promised tomorrow...

 

[John B]

Mines an 04 and it had a filter in the banjo bolt

 

[Banshee]

Mines an 04 and it had a filter in the banjo bolt

Fantastic!!!!!!! This makes a lot of sense now with a running issue I'm currently having

Will be checking for this first thing tomorrow, was yours an independant filter or was it integral to the bolt?

 

[John B]

The filter is inside the bolt so what I did was held the bolt in a vice and used a screw by screwing the screw into the inside of the bolt then pulling the screw head with a pair of big bad ass grips or if you like drill it out but make sure you remove any shit before refitting:thumb2

 

[AlexD333]

And was there any muck? Theory says there should not be any debris there as it is after filter... And if there is surely the pump internals are breaking up? :nenau

 

[John B]

I had just a little bit of plastic but all is fine

 

[Banshee]

And was there any muck? Theory says there should not be any debris there as it is after filter... And if there is surely the pump internals are breaking up? :nenau

Right and wrong

There will be some crap that will pass the filter into the Banjo filter hence why it is there, I can see why Nissan have put it there but it is also a hindrance when you start to get running issues.

If the pump was starting to break up, even if it could (I'm not sure of the internal workings of a pump) it wouldn't be able to make its way back through the mini filter. Besides when the filter is removed you'd know what the crack is as the debris and gunk would be on the correct side of the filter, ie on the way into the IP if that makes sense?

 

[solarman216]

lets try and put an end to this mini filter stuff once and for all, all the fuel that the injector pump receives has passed through a very very fine paper filter, the mini filter if it is there is only a very coarse wire filter by comparison so it is reasonable to assume that its only purpose is to arrest any large particles that may originate from the pump itself, from blocking the metering orifice that follows after the filter, Rick

 

[Banshee]

lets try and put an end to this mini filter stuff once and for all, all the fuel that the injector pump receives has passed through a very very fine paper filter, the mini filter if it is there is only a very coarse wire filter by comparison so it is reasonable to assume that its only purpose is to arrest any large particles that may originate from the pump itself, from blocking the metering orifice that follows after the filter, Rick

So it doesn't filter fuel before the IP?

 

[AlexD333]

I'm confused :hide:

 

[solarman216]

So it doesn't filter fuel before the IP?

NO NO NO NO this so called mini filter is on the out side of the pump but as said there is an important metering orifice that regulates the low side pressure in the pump that the governor may operate correctly, if this was to get blocked then the low side will overpressure leading to I do know what, but pump shut down is on the cards, Rick

 

[Banshee]

Thanks for clarifying that Rick :thumbs

I decided I was going to have a look at the Banjo Bolt tonight as I'd had a smoke and when I've smoked I'm focused and always need to be engaged lol :spliff

I took the bolt off by sneaking down behind the power steering pump with my longest extension bar, the other smaller extension bar the flexi head and a 17mm socket

It's tight down there so make sure you've got small hands and nimble fingers. You can see where the bolt has been removed from here if you look above the thread for the PS belt pulley;

3rd time lucky as they say, 1st 2 of these bolts I've ever taken out have never had the filter, mine did however, it was a mesh filter inside the bolt with a brass collar, I used a small flathead screwdriver to prize the filter out as I'd stabbed my way through the top of it, slid straight out and my god look at the state of it!!!!!! The last owner of the truck had never ran veg so I've pulled all the crap through by the looks of things, needless to say that filter is now in the bin

Next job is to securely attach some 8mm ID rubber fuel hose onto the end of the pickup pipes to replace the swirl chamber

Hope you guys found this useful :thumbs

 

[kitchenman]

Puzzled of southend here, without the mini filter where does that crap end up?
If it is on the output side of the IP then does that mean it heads for the injectors?
Until I got the Mav I only knew petrol engines and still know nothing about deisels

Since I got the Mav the mini filter has been cleaned twice, once by the garage attached to the car lot, they said it was full of what they described as belly button fluf, and seemed was the cause of the lack of power
I cleaned it about a year ago was full of a jelly like substance, I put that down to putting 40 litres of cooking oil in it.
The cooking oil cut the MPG by about a third, I had changed the fuel filter at the start of using cooking oil, apart from lack of power there were no other adverse symptons. I was using 50/50 I am now 100% deisel

 

[elty001]

Thanks for clarifying that Rick :thumbs

I decided I was going to have a look at the Banjo Bolt tonight as I'd had a smoke and when I've smoked I'm focused and always need to be engaged lol :spliff

I took the bolt off by sneaking down behind the power steering pump with my longest extension bar, the other smaller extension bar the flexi head and a 17mm socket

It's tight down there so make sure you've got small hands and nimble fingers. You can see where the bolt has been removed from here if you look above the thread for the PS belt pulley;

3rd time lucky as they say, 1st 2 of these bolts I've ever taken out have never had the filter, mine did however, it was a mesh filter inside the bolt with a brass collar, I used a small flathead screwdriver to prize the filter out as I'd stabbed my way through the top of it, slid straight out and my god look at the state of it!!!!!! The last owner of the truck had never ran veg so I've pulled all the crap through by the looks of things, needless to say that filter is now in the bin

Next job is to securely attach some 8mm ID rubber fuel hose onto the end of the pickup pipes to replace the swirl chamber

Hope you guys found this useful :thumbs

That's one caked up filter.not sure I would like to run the truck with it removed as it's obviously doing its job.anymore crap like that is now free to make its way around the fuel system.
Just my opinion of course:nenau

 

[solarman216]

Looks to me like a gauze filter mashed up getting it out, as said many times before it is on the return to the tank pipe so should not get any debris other than what falls off inside the pump, Dave to clarify it is not on the high pressure side of the pump so does not go to the injectors, Rick