Thursday, August 23, 2007

Hebmüller Pre-Filter

I finally got my pre-filter installed on the Jetta. It filters down to about 150 microns, which is not very small for a filter, but the larger filter medium makes sure that I don't lose any flow capacity across the filter element. However it's still small enough to catch any dino-diesel crud left over in my tank that gets cleaned out by the biodiesel before it clogs my main fuel filter. Thus, a clogged main filter is a thing of the past. :-) Had my car been running on biodiesel from the start, there would be no crud in the tank for the biodiesel to clean out so there would be no worry for a clogged main fuel filter.

It is still kind of fun to see the "bean juice" flowing freely into the engine through this clear pre-filter though. It should also help out in the winter when there *might* be a chance of the fuel gelling. This will allow me to see it easily if it happens. The air space in the top is nothing to worry about because it's a low pressure line on these pre-2003 TDI's. If it were a post-2003 engine (PD engine), the line would be pressurized by the tank pump and pump that air pocket right out.

If anyone local is interested, I have some extra filters and high-quality fuel line because I had to buy in bulk. The filter cost me $3.25 each and the hose cost me about $2.00/foot, both prices including shipping. If anybody local wants to put one on your TDI, let me know and you can buy the stuff from me for what I bought it for. Some people don't even put the new fuel hose on, but instead they just cut a section out of their original fuel line and put the filter in place, this works just fine too, but I liked the look of the blue hose, haha.

1 comment:

steven said...

Why Bradly Duncan, nice hearing from you. Looks like your saving the world while Im ruining it traveling all over! HA thanks for the compensation. I try to do my best but I can't convert the planes to run on the bio. Well I checked my comments and found you. All the best to you and Gina.
I don't know if your still in O town or not but lets go riding sometime.