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TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

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Old May 15th, 2012, 18:49   #1
terrydtdi
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Default The Dietzl Mod

I call this the Dietzl mod. The idea was inspired from a little project DanG144 was working on.

Here is a little more economical Cat 2 Fuel Filter housing, $36.00 from Napa, or Discount Fleet Supply for $19.00. Just trim the mount area off.



Edit : Filter Base Napa # 4770 , or Wix 24770

Here is the filter housing fitting and Napa part number. The fittings are made by Gates, and are $1.83 each including tax.




Here is the adapter fitting with the hose nipple

Here is Discount Fleet Supply's web site.
http://www.google.com/url?sa=t&rct=j...CQHRYEh-gJ8OvA
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Last edited by terrydtdi; October 28th, 2013 at 16:38.
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Old May 16th, 2012, 06:57   #2
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Do you have a part number?
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Old May 16th, 2012, 08:00   #3
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Napa Part # 7440
http://www.fleetfilter.com/filter/wi...ses/24770.html

will fit the CAT 2 micron filter and a bunch of others. Here's the WIX 2 micron.

Wix 33528
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Old May 16th, 2012, 08:30   #4
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Sweet. I'm all over this.
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Old May 16th, 2012, 08:33   #5
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Is there a part number(s) for the ports also? Where does the return line go to?
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Old May 16th, 2012, 08:39   #6
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The return is connected to the line back to the tank
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Old May 16th, 2012, 09:42   #7
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Quote:
Originally Posted by loganbmx4gt View Post
Is there a part number(s) for the ports also? Where does the return line go to?
You'll need to adapt from 1/2"NPT down to a 5/16" hose barb to mate to the stock fuel lines. As stated the IP return line bypasses the filter and goes directly to the tank.
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Old May 16th, 2012, 11:08   #8
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I assume no issues with flow?
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Old May 16th, 2012, 12:04   #9
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I too would like to know the part number for the filter head and the adapters for hose sizing.
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Old May 16th, 2012, 12:22   #10
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Probably not a great mod for driving in very low temps. You are losing the thermo tee which heats fuel going to filter.

The fittings are harware store/hydraulic shop off-the-shelf items. Filter head p/n given a few posts up.
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Old May 16th, 2012, 12:40   #11
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Cheapest I have seen so far for the filter head is at the link Baumeister provided above. The fittings I have found at Lowes, Part # 79965 for 1/2" NPT to 5/16" barb, $2.37 each. And get a 5/16", 1/4" for A3/B4 guys, barb coupling for the return line which are right there in the same area as the first fitting.
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Old May 16th, 2012, 13:28   #12
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Nice job terrytdi. Good idea cutting off the mounting bracket.
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Old May 16th, 2012, 17:13   #13
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im new to the forums, so what exactly does this do?
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Old May 16th, 2012, 18:24   #14
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Lets you use a screw on filter that can be cheaper or can filter finer or can last longer, depending on what filter you choose to use. Not necessarily better, easier or more reliable.
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Old May 16th, 2012, 18:28   #15
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ok so its like a oil filter relocation mod with better filter type?
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