Secondary fuel filter - is it worth it?

[AngusFord]

Hi All,

Been looking at getting a second fuel filter for my 03 NP DID. Just wondering what everyone's opinions/experiences are? Are they worth it?

Sorry if this has been discussed earlier but I couldn't find anything.

Cheers
Gus

[Dicko1]

One of the first mods I did to my new NW was fit a secondary filter. The price of fuel pumps is ridiculous and common rail run at extremely high pressure. Keeping fuel as clean as you can can only prolong the life of the pump and the motor.

[Lance]

Sounds like a good idea.
What filter setup do you all suggest ?
Not wanting to spend a gazillion $$, but something effective for our vehicles.

Links perhaps if you have them

I've recently bought a Diesel VW Crafter Motorhome and a 2nd filter would probably be a good idea on that as well......

[rykiel575]

Depends if you are going to some places which may have dirty tanks or dirty fuel.

For me personally it wouldnt be worth it as i dont really go out to the bush.

More importantly i am a bit more cautious about the effect of a second filter on pressure values and more wear on the pump, especially if its starting to get clogged up.

[dreamerman]

Been looking at getting a second fuel filter for my 03 NP DID

You mean a fuel filter between the stock filter and the motor? Like you I was asking the same question several weeks ago and based on desktop research I went for a primary filter placed between the tank and stock filter. Don't forget a catch can and 0% egr module!

[nj swb]

Let's also remember that the NP DiD is electronically controlled rotary injection pump, not common rail. Gen 4 research and experience is different

[Hill]

Secondary filter is a no brainer for CRD as factory filter is unable to meet Parker Racor recommendation of 3 micron @95 percent.
Both water and dirt destroy pumps and injectors.
My mate has a stock standard NP with 350k in on it.
On a case study of one I'd put the money towards a new pump.
The question I'd ask is what are you protecting and will factory filter provide the required level of protection.
BTW factory filter is around 10 microns@ 95% efficiency.

Hill

[Rich0]

Here's some info you might find useful

https://www2.pajeroclub.com.au/forum/showthread.php?t=40256

I installed the Donaldson P903316 for my Cape trip last year as a primary filter (before the factory) making sure the primary is a larger micron to get the nuts and bolts out then let the factory do its job.

The kit was around $130. I don't really know if it's done it's job as a primary filter but at that price cheap insurance and worth it.

[Having Fun]

The question I'd be asking myself is "do the farmers/ringers/postal delivery guys/oil field workers in the outback run secondary filters?"


If the answer is "not many do", which I think it would be, then you have your answer!

[BruceandBobbi]

The question I'd be asking myself is "do the farmers/ringers/postal delivery guys/oil field workers in the outback run secondary filters?"


If the answer is "not many do", which I think it would be, then you have your answer!

Like many things that aren't needed till you need it.

[nj swb]

The question I'd be asking myself is "do the farmers/ringers/postal delivery guys/oil field workers in the outback run secondary filters?"

If the answer is "not many do", which I think it would be, then you have your answer!

That could also be because their vehicles are usually considered "tools of the trade" that they don't intend to keep for a long time, and any repairs are business expenses, not personal expenses - they may be more prepared to take a gamble, presuming they're aware that a secondary filter is even an option.

Not everybody treats their vehicles with the same level of care.

[erad]

It only takes on bad batch of fuel to stuff up the whole system. And that bad batch can even come form the larger cities - you don't have to go outback to get a crook lot of fuel. I reckon an additional filter is a worthwhile investment.

[dreamerman]

It only takes on bad batch of fuel to stuff up the whole system. And that bad batch can even come form the larger cities - you don't have to go outback to get a crook lot of fuel. I reckon an additional filter is a worthwhile investment.

Especially when a pre-filter (and a catch can) won't impact warranty.

[Dicko1]

The question I'd be asking myself is "do the farmers/ringers/postal delivery guys/oil field workers in the outback run secondary filters?"


If the answer is "not many do", which I think it would be, then you have your answer!

And then we can ask...how many carry a second spare wheel, how many carry a compressor, how many shut down the egr, how many etc.etc......Many of these people run their vehicles as cheaply as they can and unlike most of us it is seen as a work vehicle only. Any mods I have done to my engine are there to ensure I get reliability and longevity from my Car. Farmers, ringers, miners etc. dont have the same concerns I have for my vehicle. I do know several cane farmers who have Toyota twin cab landcruisers and all have secondary filters, plus every other accessory you can name! Too much money in sugar cane...

[Having Fun]

That could also be because their vehicles are usually considered "tools of the trade" that they don't intend to keep for a long time, and any repairs are business expenses, not personal expenses - they may be more prepared to take a gamble, presuming they're aware that a secondary filter is even an option.

Not everybody treats their vehicles with the same level of care.

Most of the people I mentioned, if not all, put an enormous money & effort into safety in remote areas. Cost isn't a consideration, nor should it be. I can't see anyone with a modicum of common sense "taking a gamble".


Vehicle breakdowns out there are a complete PITA to get fixed. Even if there is someone on site that can fix the problem, you still need to fly/drive the parts in from the nearest supplier, which could be days away.

Like I said, not many secondary fuel filters in the vehicles though!

Ironically, a lot of caravaners that I come across while I'm out & about are quite vocal around the camp fire about secondary filters being a must. These guys usually have their shiny new 4x4 set up with all the bling, but they will never leave the tar.