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Generation 4-3 Pajero NW model 2011 - 2014

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Old 04-03-16
shorties178 shorties178 is offline
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Default 3 Micron post fuel filter installation

Finished installing a Donaldson 3 micron kit this afternoon. I made a steel bracket picking up OEM filter mounting studs, as well as the two small (unused) bolts in the firewall just to the right. Very rigid set up. I chose to plumb the filter as a secondary as the other way round just doesn't make sense to me.
Mick
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Old 04-03-16
Ian Johnston Ian Johnston is offline
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What doesnt make sense? Interested in your reasons.
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Old 04-03-16
shorties178 shorties178 is offline
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It seems pointless to me to put a coarser filter downstream of a finer filter. The fine filter would be loading up while the coarse filter would theoretically be doing nothing, because it is already receiving cleaner fuel than it can produce. If I'm going to fork out good money on filters and change them both when I'm supposed to (and the coarse one in this instance must be replaced at intervals to keep my warranty), I would want them both to actually have done some work.
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Old 04-03-16
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Originally Posted by shorties178 View Post
It seems pointless to me to put a coarser filter downstream of a finer filter. The fine filter would be loading up while the coarse filter would theoretically be doing nothing, because it is already receiving cleaner fuel than it can produce. If I'm going to fork out good money on filters and change them both when I'm supposed to (and the coarse one in this instance must be replaced at intervals to keep my warranty), I would want them both to actually have done some work.
Exactly. I am an aquarist and nobody in the aquarist world puts finer filter media before coarser filter media.
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Old 05-03-16
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It seems pointless to me to put a coarser filter downstream of a finer filter. The fine filter would be loading up while the coarse filter would theoretically be doing nothing, because it is already receiving cleaner fuel than it can produce.
I've been saying the same thing on the forum for years.

Nice neat-looking installation mate. Did you have much trouble bleeding the system after installing the new filter. I presume you filled it all with diesel before trying to bleed it.

Cheers

Geoff
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Old 05-03-16
Hill Hill is offline
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Quote:
Originally Posted by shorties178 View Post
Finished installing a Donaldson 3 micron kit this afternoon. I made a steel bracket picking up OEM filter mounting studs, as well as the two small (unused) bolts in the firewall just to the right. Very rigid set up. I chose to plumb the filter as a secondary as the other way round just doesn't make sense to me.
Mick
SHortie

Neat set up. There is quite a kink in on of the pipes. A bigger loop may be required to increase the radius of the pipe.

Your fuel pump and injectors will be thanking you for the rest of their prolonged life.

Setting up as secondary filter is the way to go. Donaldson recommend fitting as primary filter.

Change secondary filter at least every 12 months. 10-15K seems around the right service interval to me.

Hill
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Old 05-03-16
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I've been saying the same thing on the forum for years.

Nice neat-looking installation mate. Did you have much trouble bleeding the system after installing the new filter. I presume you filled it all with diesel before trying to bleed it.

Cheers

Geoff

+1 Not only common sense but a world wide practice for most filtering processes.
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Old 05-03-16
shorties178 shorties178 is offline
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No I didn't pre-fill the filter Geoff. Just loosened the bleed screw & pumped for a while. I was surprised by how quickly it filled really. The clear bowl underneath the filter filled in about 4 pumps so it didn't take too long to squirt out the bleeder. Started fine with nary a miss.
Mick
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Old 05-03-16
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No I didn't pre-fill the filter Geoff. Just loosened the bleed screw & pumped for a while. I was surprised by how quickly it filled really. The clear bowl underneath the filter filled in about 4 pumps so it didn't take too long to squirt out the bleeder. Started fine with nary a miss.
Mick
I did not as well. Just had to pump more. I am about to swap mine over.
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Old 07-03-16
crojo crojo is offline
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Nice neat job, thanks for the pictures
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