This is as far as I have been able to go as so far I am unable to find a source of 16mmx1.5 locally.
The housing is threaded to 16mmX1.5. I did thread some aluminum bar stock but I am still hoping to find a nice steel bolt some where locally. I found out that some Range Rover Wheel Studs are threaded 16mmx1.5

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84 300D, 82 Volvo 244Gl Diesel

Are you looking for a finer filter for the WVO side or the diesel side?

If you only get 2-3,000 miles on a 10 micron WVO filter, you need to improve either your de-watering, your filtering or both. I have NEVER had to replace a WVO filter for plugging, even at 70,000 miles.

What is your conversion like?

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Ron Schroeder
'85 300 Turbo Diesel 2 tank WVO
'83 300 Turbo Diesel 2 tank WVO
Some former WVO vehicles since ~1980:
'83 Mercedes 240D
'80 Audi 4000D
'83 ISUZU Pup
'70 SAAB 99 with Kubota diesel
'76 Honda Civic with Kubota diesel
'86 Golf
Several diesel generators
All with 2 tank WVO conversion
LI NY

Supposedly that particular Baldwin filter has a High-Efficiency Media repels water and other contaminants.


Diesel 911 has been doing a good job into looking to see how it can be adapted, along with looking into other types of filter solutions.

EDIT: Here is a link to the Modification to a Lower Micron Filter.

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1983 123.133 California
- GreaseCar Veg System

I am glad you posted your research as I did not know the fuel filter BF7591-D existed.
I sent you an E-mail; time to finish up this project.

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84 300D, 82 Volvo 244Gl Diesel

The factory Nominal Micron rating of 10 Microns dose not cause injector or pump failures. However, a Nominal Micron rating means the it filters out 50% of the 10 Micron particles on 1 pass through the filter. It will also filter out some particles smaller than 10 Microns and will also let some particles larger than 10 Microns pass through the filter. This seems to be OK as long as the diesel fuel from the pump is clean to begin with and your fuel system is also clean. Part of the reason for this is that only a small amount of fuel that passes through the fuel filter is injected into the engine the bulk of the fuel returns to the fuel tank. So, eventually the fuel that is in the tank gets run through the filter many, many times and each time the fuel gets cleaner and cleaner until you put more fuel in.
Now if the ideal world gets upset by cruddy fuel or cruddy tank the filtering out of only 50% (but a greater volume of that crud) of the 10 Micron particles due to the shear amount of the particles available can become an issue that can shorten the life of mainly the Fuel Injection Pump.
As far as WVO goes you would think that filtering it through the filter bags would be enough but maybe it needs to be filtered 2 times or more (remember if the bag has a Nominal Micron Rating it only filters out 50% of that rating on the first pass through the filter bag). Or maybe there is another issue similar the Soot in the Crankcase Oil. The Soot wants to clump together and form larger particles; maybe the filtered small particles in the WVO while in the tank want to clump together also and make larger particles.
Assuming the fuel system is already clean the are not too many alternatives. You filter the fuel well before it goes into the tank or you change filters on the vehicle when they plug up sooner than you want to (or install larger filters that will take longer to plug up).
As far as I can tell my fuel system and the fuel I buy is clean but I wanted to have better filtration so I made some adaptation and installed the WIX/NAPA version (3528) of the CAT 1R-0750 with a Nominal Micron Rating of 2 Microns and the filter itself is also a much larger than the stock filter. Since then I have also found out that the real CAT made filter is a 2 Micron Absolute filter meaning that nothing bigger than 2 Microns is supposed to pass through the filter (better than the 2 Nominal Micron rating). When I get around to it I will replace the WIX/NAPA filter with the original CAT one. This is my choice.

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84 300D, 82 Volvo 244Gl Diesel

With that CAT filter on the 3208ATAAC we were notified that the aftermerket makers were 10-20micron. The CAT originally was designed to run with that filter as a polishing filter, at 2u. Prior to that, we ran 20u elements in the upstream Racor 1000FG system, after the change we started running the 2u Racor element.

The reason for the particle size specified in the filtration isn't merely clogging the system or immediate failure, but the eventual effect of the larger (often abrasive) particles causing wear to the injection pump and nozzle critical clearance parts. The finer the filtration the longer the injection system's life.

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Gone to the dark side

- Jeff

The aftermarket filters rated at 2 Nominal Microns might very well be 10 micron or 20 micron Absolute Micron filters. I put the NAPA/WIX filter on as at that point it was the best to my knowlege; as I did not know till reading a CAT filter add that they had an Absolute Micron rating. The NAPA/WIX It is still way better than the 10 Nominal Micron stock mercedes filter and a good deal larger.
One of the sites I went to (a VW TDI forum) said there was a test CAT did comparing the aftermarket filters to their filters; unfortunately the link to that site was dead. Later I found the CAT add and decided accept their Absolute Micron claim. I have also ordered 1 CAT 1R-0750 filter from a seller on Ebay.
Another reason for me buying the aftermarket filter at NAPA was I needed a filter measuring purposes so that I could proceed with the modifications; so I bought locally.

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84 300D, 82 Volvo 244Gl Diesel

If you find a source for the old-style OE Cat 1R-0750, cast top, molded seal, and the steel can wrapped up over the edges, not crimped at the edge, buy 'em. I believe that the new-style is a typical stamped and crimped design with a stamped gasket.

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Gone to the dark side

- Jeff