Who would be interested in a thread adapter bushing to allow 616/617 engines to use CAT 1R-0750 or 1R-0749(same as 1R-0750, just taller/longer) or equivalent filters? How much would you pay for one?

Referencing the following threads:

2 Micron fuel filter CAT

Lower Micron Fuel Filter Mod

I'm looking at having a machinist make me an adapter, and it may make sense to have more made.

Who's interested?

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap

I'd certainly sign up for a professionally machined adapter kit for this.

Thanks Cloudsurfer.

If it makes a difference, this would be a group-buy situation, not a for-profit venture.

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap

Id be interested, but I can't financially commit yet; I'm unemployed.

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1998 VW Cabrio
2001 Audi SomeRoad A/T (no air suspension)
2003 Audi DeadRoad M/T (no vroom, for later)
2002 Audi NoRoad A/T (nothing under the hood, being rebuilt)

I'm interested.

Why not just add a fourth fuel filter somewhere else like right next to the heater core?

Dkr.

Actually there is room over on the Oil Cooler side behind the Left Head light and to the front of the the Fender Well (under the Hood). I prestnly have one of those Frantz Toilet Paper bypass Oil Filters in that location.

Adding other Filters is going to depend on how much you like the Hard Plastic Fuel Lines.

I did not care about that and replaced both of the Hard Plastic Fuel Lines with regular Fuel Hose. I did that because when I moved the Filter Housing it put a lot of Stress on one of the Hard Plastic Lines.

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84 300D, 82 Volvo 244Gl Diesel

Doesn't adding filters of that sort make the lift pump work Too hard? Seems simpler to put in one finer filter versus adding one.

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1998 VW Cabrio
2001 Audi SomeRoad A/T (no air suspension)
2003 Audi DeadRoad M/T (no vroom, for later)
2002 Audi NoRoad A/T (nothing under the hood, being rebuilt)

I was joking. I just don't get it -- it's not like we have some epidemic of fuel issues due to poor filtration. I think Mercedes probably went overboard with the filtration.

Dkr.

The fuel tank has a screen and then there is the opaque pre-filter
which is prior to the actual filter. There is only one filter for fuel. I assume you believe the other two are to be called "filters"; which would be incorrect. The OEM filter is 30 microns; not absolute. 2 microns absolute would be a bit of excessive to some, to others it would not be.

The below is from my Notes:
The CAT 1R-0750 has an efficiency rating of 98% at 2 microns. The stock Mercedes filter is rated at 10 microns nominal. Meaning 50% efficiency rating at 10 microns. CAT did a study and using a 2 micron filter increase life of fuel injection parts by 7 fold compared to using a 10 micron filter (again is stock).

Of course the application on the CAT Engine is different and the Injectors are direct Injection and the Engines are generally on commercial vehicles that spend a lot of their time pulling or carrying a load.

So the situation with a Mercedes Engine is not the same.

Perhaps the Fuel Filter issue is similar to the Bypass Oil Filter issue. It has been proven that the better Filtration of a Bypass Oil Filter decreases wear and can extend the useful life of the Oil; especially when additives are added to replace the depleted Additives in the Oil.

I also have a Bypass Oil Filter on the Mercedes.

To me either the Fuel or Oil Filter Mods are useful and proven of proven benifit. But, neither is essential.

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84 300D, 82 Volvo 244Gl Diesel

The suction side is limited by the Atmospheric Pressure. So that is the side that is most sensitive to any added resistance.

That is the side that most Water Separators go on and many Water Separators it is not recommended to put them on the pressure side of the Fuel Supply/Lift Pump.

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84 300D, 82 Volvo 244Gl Diesel

It kind of sounds like this is a contradiction. I haven't seen any studies or evidence that better filtration will provide for more longevity in our fuel systems. It's not like IP failures are even semi-common on high-mileage Mercedes diesels. And, if the injectors have to be rebuilt every 20-30 years at minimal expense and labor, it's not like a major failure.

Again, it really looks like this is a solution in search of a problem.

Dkr.

Semantics aside, most vehicles have just one filter. Whether you call the one in the tank a strainer or a filter and however you choose to name the pre-filter, on most vehicles in production this would be considered excessive.

Dkr.

Well everyone has their own opinions and is going to do or not do what they want to.

When I was a Mechanic I just used to change the Filters when I was supposed to and put no other thought into it.

Because of owning a Mercedes and this Forum I have learnd more about it.

Depending on which rating system is used; the Nominal Micron or Beta system the Filter still works the same. I am going to use the Nominal Micron rated Filters as an example as I undersand that better.

I am going to pick the 10 Mircon Stock Mercedes Fuel Filter. With the Nominal Micron Rating that filter filter out only 50% of the 10 micron particles (i assume larger particles do not make it through the Filter) on the first pass through the Filter.

So that is how it works. It filter out 50% of the 10 Micron Particles. Obviously smaller passes throug also.
So you get a Full Tank of Fuel.
As we know the Fuel Supply/Lift Pump pushes a lot of Fuel through the Filter, a lot more then gets burned in the Engine and returns that Fuel back to the Tank and that same Fuel eventually gets pushed through the Filter again and again and again.

The first time the Fuel goes through 50% of 10 Microns is filter out, the next time it passes another 50% of particles is filter out and so on and so on. What you end up with is the Fuel that is in the Tank eventually becomes exceprionaly clean because it has passed through the Filter 100s of times.
This works as long as there is nothing in the Fuel Tank itself that is going to create more particles.

Until the next tank Fill up.

Also the 10 micron Filter actuall does trap smaller then 10 Micron Particles. Somewhat like if you threw a hand full of BBs at a Chain Link Fence. Most of the BBs will pass through the hole in the Mesh but a few are going to hit the wire mesh and not pass through.

An Oil Filter works in a similar manner concerning the same Oil going through the Filter multiple times except that the Engine continues to some degree to make particles whereas there is nearly no particles created in the Fuel Injection System.
And another problem is that all of the Oil is headed for surfaces that wear. That means particles in the Oil are going right to the worst possible place for them to end up.

The Air Filter works slighly differently because the Air only pases through the Filter one time. Oddly it is difficult to find what Micron level that Air Filter Filter out.
If you buy an Filter for some commercial use like a Machine in a Warehouse it will list the Microns. But, automotive Filters just list the cubic feet per minute.

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84 300D, 82 Volvo 244Gl Diesel