30 micron filter?

[Fbo974]

I now understand better why my scv valve was often dirty, and my fuel filter also clogged quickly , and i had like fuel cut sometimes which was quite unpleasant when driving


I have an LHD, and I thought to install the filter in this corner there

[Fbo974]

I could therefore use it first, and keep the OEM filter second (10microns) .
It can do the trick rather than having nothing, what do you think?

[Fbo974]

Finding a primary fuel filter, where I live, is quite complicated, 13000kms from Australia, 10000 from France, and not many people with this kind of spare part here.

10kms from my home, there is a marine shop, and it has this filter there with water decanter .

Finding Donaldson is mission impossible (apart from ordering in Australia 3 weeks delay), luckily I saw this store, and it is the only one he has

[Fbo974]

What's up guys ,
I hope Christmas went well for all of you I come to this post because I discovered a pretty big problem on my 2007 shorty .
See for yourself in photo ....


After thirteen years, it might be normal, since our fuel is disgusting here.......

I emptied the tank, and cleaned everything

[Hill]

Thanks guys. Think I'll go the 2 micron.

Cheers

Morgan

It may be worthwhile to ask supplier for an efficiency rating for filter and also flow rate.

Without an efficiency rating to state a particle size is meaningless.

The Donaldson 3 micron kit is rated at 99% efficient and 114 LPH flow rate.

Data on efficiency rating and flow rate should help in making an informed decision.

Hill

Please note I have no association with Donaldson. I just like their products

[MorgansPC]

Thanks guys. Think I'll go the 2 micron.

Cheers

[Dicko1]

I fitted the Diesel Care 2micron secondary filter at 23k, then changed the factory filter at 30k service & then both at 60k service. As you can see from the photos the factory Primary is quite clean and the finer secondary is 75% contaminated. If you were solely relying on the factory filter, there is an awful lot of junk that would have travelled through the pump & injectors. Cheap piece of mind considering the refurbishment costs of CRD parts.

And that is exactly why I have a secondary......Not really in MM,s best interest to have perfectly clean fuel going into a motor.....At $5,000 a pump they,d lose a lot of money..cynical...only from experience.



cheers

[Smallfry]

I fitted the Diesel Care 2micron secondary filter at 23k, then changed the factory filter at 30k service & then both at 60k service. As you can see from the photos the factory Primary is quite clean and the finer secondary is 75% contaminated. If you were solely relying on the factory filter, there is an awful lot of junk that would have travelled through the pump & injectors. Cheap piece of mind considering the refurbishment costs of CRD parts.

[MorgansPC]

Hi all,

I wanted to restart this discussion to aid my knowledge in additional diesel filtration.

As per my signature I have PC Challenger which to my knowledge has a 10 micron OE filter.

I want to add an additional filter, however primary or secondary to the OE filter is the question.

As has been discussed in posts above, DieselCare and Berrima Diesel appear to have opposing thoughts.

DieselCare recommend a smaller micron filter secondary to OE filter. They recommend replacing the OE filter as per log book services and the secondary filter every second OE filter change.

DieselCare suggest if you choose a primary to OE filter you change it on each occasion change the OE filter.

Berrima suggest a larger 30 micron filter primary to the OE filter. Interesting they suggest most CRDs run 2 micron OE filters (is it only Mitsubishis which run larger 10 micron OE filters)?

Berrima then suggest changing the primary filter every 30-40 thousand kms, basically every second OE change, while maintaining the OE filter log book intervals.

While I couldn't find specific recommendations from Donaldson, unless I'm blind I could only find 3 micron filters under their "Added Protection" section, so I'd take that as they think secondary to OE is the go.

So I am interested in what people out their actually do. Do more go primary or secondary and why did you make that decision?

During my research the only possible negative comment I found on secondary to OE is possible fuel flow issues due to such a fine filter.

As an aside are the Donaldson filters significantly batter than the Fuel Manager filter or v.v? I do like the kit that DieselCare put together and the fitting instructions they provide.

Thanks again.

[Hill]

jbnp

Thanks for posting Diesel Care's recommendation.

http://www.dieselcare.com.au/service...ation-systems/

Some interesting information included:

1. WHAT KIT DO WE RECOMMEND?

Both options (primary and Secondary) will provide much better protection than not having an additional filter. Each one has their advantages but at the end of the day, we recommend secondary.

The reason is that we believe that finer filtration ultimately provides better protection. It’s also reassuring to know that if you are unlucky enough to get a bad tank-full of fuel, and the filter warning light on the dash comes on, that if anything has penetrated your factory filter, it’s been caught in the final filter. The fact is; contaminants DO get through filters. As Diesel Injection Specialists we see evidence of this almost daily. The best way to prevent expensive repairs caused by fuel contamination is to filter it. Fuel cannot be too clean.


2. Most factory filters on modern Common Rail systems are rated at 10 micron.
This confirms my research into factory filters assuming 95% efficiency rating. eg Donaldson P550385 which is replacement for factory filter for CRD Pajero should be equal or better than factory specifications. Donaldson state that it is rated at 12um (micron) @97.5%. (10 micron at 95% efficiency is my estimate of factory filter


Some Additional information:

1. Parker Racor recommend CRD filtration at 3 microns and 95% efficiency. Assuming Diesel Care's 2 micron filter is at least 95% efficient this would exceed PR recommendation

2. Berrima Diesel take on filtration http://www.berrimadiesel.com/home/services/filtration/

Some background reading for new members:

1.Fuel Filter Micron Rating NT Diesel
http://www2.pajeroclub.com.au/forum/...ad.php?t=34944

2. Donaldson 3 micron filter 99% efficiency filter
http://www2.pajeroclub.com.au/forum/...ad.php?t=40256

Hill

[jbnp]

The following is a reply to an email that i sent Diesel Care in december regarding whether or not to install a secondary filter.

"Hi Jesse

Im thinking your Pajero is Pre common rail. It was about 06 that they changed to CR. If it’s Pre CR we don’t have a specific kit for it, however there’s no reason why a Primary filter couldn’t be fitted. I wouldn’t suggest a Secondary for this model due to the type of fuel pump it has.



If yours happens to be a CR, I’d recommend a Secondary Kit, they cost $340



Regards

Andrew Bourne

Director



Diesel Care Australia P/L
and Steinbauer Tuning Technologies"

just thought id throw this into the mix.....

[Jeffwatkins]

That is a brand new, unused flow rate. The important flow rate is at 50% efficiency to allow for blockage of the filter in use.

Check out post 6.

[Katana Chatty]

I would think 114 LPH would be more than ample.

That is a brand new, unused flow rate. The important flow rate is at 50% efficiency to allow for blockage of the filter in use.

[Jeffwatkins]

I would think 114 LPH would be more than ample.

[Katana Chatty]

Lets go back to the original question to help clarify situation.

1.We don't really know if application is petrol or diesel. CRD or non CRD.
2 We do know that "scattered" want to fit a 30 micron filter with unstated efficiency rating as a secondary filter.
3 We dont know specifications of primary filter

Unless primary is very low spec the answer is still NO.

Hill

How about we take a further step back?

Most people get confused between the terms "primary" and "secondary" filters and I think this is what we have a case of here with Scattered.

The "primary" filter is the one first in the fuel line -I am neglecting to think of the fuel tank strainer as a filter here. The "secondary" filter is the one next downstream of the primary. You could fit a "tertiary" if you wanted...

Anyway, most people in my experience think that because they are fitting a second filter to the vehicle it is a secondary filter, when in most instances they are actually fitting a new primary filter, converting the OEM filter to a secondary filter. Again, in my experience, this is what 99.9% of people actually wind up doing.

As a primary filter a 30 micron is fine - it will act as a water trap and a means of catching enough dirt to slow down clogging of the secondary (OEM) filter.

If you retain the OEM filter as the primary filter and fit a new secondary filter then 30 micron will do nothing as the 10 micron will catch everything anyway. To be effective in this instance the secondary would have to be smaller than 10 micron.

Manufacturers usually recommend against installing tertiary filters as smaller filter gauges usually mean restricted fuel flows. And yes, I know you can get 3 micron filters that will have sufficient flow, but they are not all that common.