The Dietzl Mod

terrydtdi

Veteran Member
Joined
May 16, 2006
Location
Charleston S.C.
TDI
2000 MK4 TDI Jetta 5spd
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=...ozgEtDPH46C6UOw4A&sig2=aThDceR0CQHRYEh-gJ8OvA



Cat filter 1R-0749/P551311 uses 1"-14 threads
Also 1R-0755, still 2 micron absolute filter, but 46% larger OD, and 29% taller and has 1⅜"-16 threads.
Volume of 1R-0749 is 100 cubic inches, or 0.43 gallons, 1R-0755 is 273 cubic inches, or 1.18 gallons.

0749 is available and cheap ($9-19) and are in three lengths, also a water-separator(but much less filter efficiency). Base can be cheap($18-$50).
Cat filters rated at 98% 2 micron, Donaldson 99% and are only ones considered absolute.
Fleetguard 94% 2 micron.

BF1212 is best for emulsified water removal 95%.
Below is info compiled from http://beyondbiodiesel.org/forum/index.php?topic=48.0:

FILTER HEADS (1-14" Thread)
Cat -280-2698
Donaldson P174777, Fleetguard 3304173S, fleetguard base 142784S and the Baldwin OB1308.
Perma-Cool 88864 High Flow Filter Head (1/2 NPT Inlet / Outlet)
Perma-Cool 81074 Fuel Filter/Water Separator Kit (1/2 NPT Inlet / Outlet)
Perma-Cool 81794 High Performance Filter Head (3/4" NPT Inlet / Outlet)
Fleetgaurd 142784S (1/2 NPT Inlet / Outlet)
Donaldson P174768 (7/8-14UNF)
Baldwin FB1311 (7/8-14 UNF Inlet / Outlet)
Fleetguard 3930618-S ( 1/2-14 )
Fleetguard 212013S ( 7/8- 14 ) This is the Dual Mount!
NAPA 4770
Wix 24770

FILTER NUMBERS

Cat Primary Filter/Water Separator 175-2949 (threads 1-14 UNS-2B )
Fleetguard FS19683
Donaldson P551743
Baldwin BF1268
Wix 33005
Luber-Finer LFF8030
ACDelco TP1002

Longer 11-12":
Cat Secondary Filter 1R-0749 (2 Micron) (threads 1-14 UNS-2B )
Fleetguard FF5319
Donaldson P551311
Baldwin BF7587 (BF614, Standard Version, BF7633, Short Version)
Wix 33674
Luber-Finer LFF2749 (High efficiency version of LFF5823B)
ACDelco TP1322
Fram P8335
Purolator F75185
Hastings FF1056 (FF1007, Standard Version FF1079, Short Version))

Shorter:
Cat 1R-0750 (2 micron) (threads 1-14 UNS-2B )
Fleetguard FF5320
Donaldson P551313
Baldwin BF7633 (BF7587, Long Version)
Wix 33528
Luber-Finer LFF3347
ACDelco TP1326
Fram P8334
Purolator F65213
Hastings FF1079 (FF1056, Long Version)
 
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Ski in NC

Top Post Dawg
Joined
Jul 7, 2008
Location
Wilmington, NC USA
TDI
2001 Jetta ALH 5sp stock
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.
 

loganbmx4gt

Veteran Member
Joined
Apr 14, 2011
Location
Jackson, TN
TDI
97' Passat (1Z), 02' Golf
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.
 

Lightflyer1

Top Post Dawg
Joined
Sep 13, 2005
Location
Round Rock, Texas
TDI
2015 Beetle tdi dsg
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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Lightflyer1

Top Post Dawg
Joined
Sep 13, 2005
Location
Round Rock, Texas
TDI
2015 Beetle tdi dsg
Only no relocation and the filter choice is up to you. Changing it doesn't seem any easier than stock, and you lose the thermo tee as stated above.
 

loganbmx4gt

Veteran Member
Joined
Apr 14, 2011
Location
Jackson, TN
TDI
97' Passat (1Z), 02' Golf
Seems to me that plumbing in the thermo-T would be easy since there are 2 inlet ports in the filter head. I'm going to have to buy these.
It shouldn't. And I'm actually thinking of keeping the stock filter and plumbing this in after it somehow. So a dual filter setup with the function of the thermo tee.
 

Bob_Fout

Oil Wanker
Joined
Sep 5, 2004
Location
Indiana
TDI
2003 Jetta - Alaska Green (sold) / 2015 GTI 2.0T
Regarding the thermo T: 98 NBs, A3 Jetta and B4 Passats don't have 'em. Be mindful of the weather, where you are filling up, use additives.
 

greengeeker

Vendor
Joined
Feb 8, 2006
Location
Cambridge, MN
TDI
2002 Jetta GLS
It should also be noted that you lose the ability to drain the water out of the filter as well. That is unless you find a spin-on filter with a drain.
 

Abacus

That helpful B4 guy
Joined
Nov 10, 2007
Location
Relocated from Maine to Dewey, AZ
TDI
Only the B4V left
Oh. Just the 98 NB then. (I figure it used the existing fuel filters at the time)
Now that you mention it, I do remember hearing about people using the NB filters and deleting the thermo-t. I've just never seen one in real life and never had a problem with the stock one.

Still, I like the idea of this, but it does get mighty cold up here in winter. Maybe one in series is the answer, like has been mentioned.
 

turbocharged798

Veteran Member
Joined
May 21, 2009
Location
Ellenville, NY
TDI
99.5 black ALH Jetta;09 Gasser Jetta
After jelling up a few times with the 99.5 and being stranded in the cold, there is no way in heck would I want to delete the thermo-t.
 

terrydtdi

Veteran Member
Joined
May 16, 2006
Location
Charleston S.C.
TDI
2000 MK4 TDI Jetta 5spd
Well as far as weather conditions I can only vouch for the Souteastern Region of the US. The lowest temps I've been in with this set up is 09* and I haven't had any issues what so ever. Performace hasn't been altered, however it seems it could have helped a smiggen. Probably all in my mind. ;)

I should have taken some more pics when I trimmed the mounting bracket off of the filter base, but it's pretty straight forward.

I then removed the screw on the filter bracket so it could open up enough for the filter to fit in the original filter bracket. and cut to fit a piece of high density foam and placed it under the filter to support the filter from the bottom. It is very secure and doesn't move at all.

It's just a very inexpensive way to be able to use a filter with better filtration. The Napa part # for the filter base is 4770
 
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TornadoRed

Top Post Dawg
Joined
Aug 3, 2003
Location
West Des Moines (formerly St Paul)
TDI
2003 Jetta TDI wagon, silver; 2003 Jetta TDI wagon, indigo blue; 2003 Golf GL 5-spd, red (PARTED); 2003 Golf GLS 5-spd, indigo blue (SOLD); 2003 Jetta TDI wagon, Candy White (SOLD)
After jelling up a few times with the 99.5 and being stranded in the cold, there is no way in heck would I want to delete the thermo-t.
On two occasions I got some bad fuel. With the thermo-T, the engine started and ran fine for longer than five minutes, before the thermostat opened and let cold gelled fuel flow through the filter toward the injection pump. That's when the engine died and would not restart.

Personally, if the fuel in my tank is gelled, I'd rather be stranded in my driveway than several miles away. IMO, getting rid of the thermo-T is a good thing, especially as it is often the cause of air leaks and starting problems.
 

terrydtdi

Veteran Member
Joined
May 16, 2006
Location
Charleston S.C.
TDI
2000 MK4 TDI Jetta 5spd
18,000 miles on this set up now and haven't seen air running through the fuel line since it was installed, and no issues since.


I'm glad I went with this.
 
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