The glass inline filter is a mistake.
They are a cheap screw apart useless gimmick and will leak air into your fuel system.
They should find the knucklehead that invented the glass inline filter and hang him.
You should mount a 12V fuel pump right onto your new frame right after a sedimenter up close to the fuel tank.
tank -> sedimenter, -> 12V fuel pump -> lift pump -> fuel filter -> IP -> return joins injector spill over and goes back to the tank.
Then you have a self bleeding suel system.
Change a filter or run out of fuel is no problem... your frustrating days of trying to bleed out air are gone... switch on the key, wait 5 minutes for the 12V fuel pump to push all the air back to the tank, start and drive away.
Filters before the pump on a diesel can be a bad idea if you are ever anywhere cold. They become very restrictive as the viscosity increases in the fuel and are easily blocked with gel. This is why sedimenters are used in that location. Any filter and especially a small one like you are discussing will be much too restrictive for diesel use.
I second Robert's comment about the glass filter, but for another good reason, safety.
In all my streetrodding and muscle car years, I've seen three vehicle burn to the ground where the glass filter was at fault. In two cases, a rock was kicked up and smashed the filter spraying gasoline on hot headers. In the other case, the owner used zip ties to secure the rubber fuel lines running to and from the filter. One broke and the engine vibration smacked the filter against the engine, cracking it with the same result.
Clogging, leaking, and fire risk are all reasons to go with a sedimentator vs. inline filter. I also really like the electric fuel pump idea. I'm going to look into that for the 300tdi in my Series III.
You asked for suggestions and you got them (right John B and Matthew?).
I know that it is sometimes difficult when you get what you ask for, but you did ask!
There are 2 roads, the hard road that leaves one learning by their mistakes from being stranded on the side of the road when your engine stops unexpectedly.
And then the easy road where you learn by the failures and corrective measure from others that have already been stranded on the side of the road and made corrective measures.
We have "traveled down the same road you are just turning on", you can take the hard road or the easy road.
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