G'day Iain, Welcome to the forum, nice to have another dieseler.
I'm on the way to biodiesel, but not there yet.
The fiilter you currently have on your golf sounds like one of the CAV types without lift pump. If you look around, you would be able to find another filter housing WITH lift pump, but it's not essential.
CAV type elements cost about 4-5 bucks each if you buy them in bulk. They do a pretty good job of filtering. I think when i finally get some biodiesel made, i will just run the CAV filter, and of course, carefully filter the biodiesel after production.
Some guys on here (or at least one)..run two crappy cheap filters in parallel before the CAV filter, but they cost about 5 bucks each anyway, and they have about the same filter surface area to block up with crap anyway.
As brackie said, your problems will be the built up crud in the tank and lines from running petro diesel, which should clear up within half a dozen tanks of fuel.
If it's anything to go by, my plan is to run the standard CAV filter, but ALWAYS carry a spare CAV element in the car with me.
As for bleeding the system, i don't think it will be much of an issue. When you change the filters, fill them up with fuel, and just see if it will start (it may suck the fuel up automatically, and "self prime"- it's happened for me before). Otherwise, crack the banjo union at the very top of the injector pump (the one with the return line attached to it) and turn it over (without glowing) until there is no more air in the pump.
Shouldn't have to bleed the injector lines..
Come back and chat with us Iain, the diesel forum has been a little slow of late!
Peugeot 306 XTDT 1.9 Turbo Intercooled Diesel
1976 LS parts vehicle
Used to have: Mk1 Swallowtail LS DIESEL!