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7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

 
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post #1 of 10 (permalink) Old 03-18-2010, 03:29 PM Thread Starter
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custom cooling filter photos

Using a filter head from my local international dealer and parts from local plumbing supply, I installed a coolant filter on my '92. Here's the pics etc:

Custom Coolant Filter on my IDI F250 | hyperlogos.org

1992 F250 XLT 4x4 Super Cab 7.3 IDI E40D 3.55 ATS 088 4"R.C 360k
1982 MBZ 300SD W126 California model w/Sunroof, no EGR
1997 Audi A8 Quattro 225k Warm/Cold packages
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post #2 of 10 (permalink) Old 03-18-2010, 08:36 PM
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Looks good to me

Did you use the filter that slowly adds the SCAs????

85 F250 XLT Lariat 4x4 7.3L N/A, C6, 315/75/16 Siped Wild Country Muds, Manual ZD9s, K&N, Soup Bowl Out, Dura-Lift Pump, Dynomax 3" Y-pipe-4" AFE Muffler-5" Turndown.

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Turn it up!
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post #3 of 10 (permalink) Old 03-19-2010, 08:39 AM Thread Starter
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Originally Posted by Plywood View Post
Did you use the filter that slowly adds the SCAs????
yeah, I think I have the wrong one, with too much SCAs. It says it was designed for a 12 gallon system, these trucks are supposed to be 8 (seems more like 7 though.) I used a fleetguard filter from the international dealer (bayshore.) I anticipate running through my first couple filters pretty fast, though.

1992 F250 XLT 4x4 Super Cab 7.3 IDI E40D 3.55 ATS 088 4"R.C 360k
1982 MBZ 300SD W126 California model w/Sunroof, no EGR
1997 Audi A8 Quattro 225k Warm/Cold packages
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post #4 of 10 (permalink) Old 03-20-2010, 12:12 AM
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Why is the output side of the filter a weak point in the design? I used simple barbed brass fittings (90s and straights) and the little factory style (corbin) clamps, without weak points on my PSD.
I wouldn't use rtv gasket maker, but i guess you'll be ok. I used Permatex thread sealant (765-1188). I've used it on head bolts that go into coolant cavities and never had a leak.

1989 F250 7.3IDI, 2x4, SC, LB, ZF-5, 110K, bone stock, no bells, no whistles, no frills, no nonsense.
1997 F250 7.3DIT, 4x4, SC, LB, E4OD, 120K, 203F stat & coolant filter, otherwise stock,
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post #5 of 10 (permalink) Old 03-20-2010, 12:26 AM Thread Starter
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Why is the output side of the filter a weak point in the design?
Because of the direction the threads run, the weight of the hoses and such are always trying to unscrew it. With vibration and all, I think a back-up strap would be wise. However, I torqued it down very well, and sealed it with the RTV, so I think it will turn out okay.

1992 F250 XLT 4x4 Super Cab 7.3 IDI E40D 3.55 ATS 088 4"R.C 360k
1982 MBZ 300SD W126 California model w/Sunroof, no EGR
1997 Audi A8 Quattro 225k Warm/Cold packages
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post #6 of 10 (permalink) Old 03-20-2010, 07:10 AM
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Coolant filters are available without SCA's if you can't find the correct size.

Regards,

Paul - Pocono Mtns. USA
02 E350 15 Passenger Cream Puff, 92,000 Miles, 5.4L Gasser

'90 E350 7.3L Ex-Ambulance High Top 420K Miles, No Turbo, Stock Stock stock, No ELC! (Extended Life Coolant) & 10 Oz. Bars Stop Leak. 10 wonderful cool years using Freeze12 without any AC system modifications. Retired with blown trans.


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post #7 of 10 (permalink) Old 03-20-2010, 11:25 AM Thread Starter
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Coolant filters are available without SCA's if you can't find the correct size.
I hear that even Napa has one that's the right size, and most screw-on coolant filters seem to be in the same form factor. I bet someone around here even knows a part number for ordering one or another of 'em. I went to the coolant filter system because it becomes cheaper than buying SCAs in short order! Well, if you pay less for fittings than I do, anyway. As it is, it will take me a while to break even, but I should realistically be able to do so over the life of the truck... which hopefully will be longer with a filter

1992 F250 XLT 4x4 Super Cab 7.3 IDI E40D 3.55 ATS 088 4"R.C 360k
1982 MBZ 300SD W126 California model w/Sunroof, no EGR
1997 Audi A8 Quattro 225k Warm/Cold packages
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post #8 of 10 (permalink) Old 04-16-2010, 12:02 PM
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napa coolant filter part number:

4070 - no sca
4071
4072
4073
4074 - most sca

no idea if it will fit the filter base you got but it fits mine.

'93 F250 7.3 idi turbo, ZF5, 2wd, excab, long bed.

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post #9 of 10 (permalink) Old 04-16-2010, 08:20 PM
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what is sca's ??????

94 F250 5 speed 7.3 IDI turbo 4x4 ext cab long box
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post #10 of 10 (permalink) Old 04-28-2010, 12:10 PM
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sca - special coolant additive

info explaining need :
Q. What is cavitation, and test strips, and all that jazz?

A. Contributed by Agnem...
The say a picture is worth a thousand words, so Cavitation, and then come back and read the rest of this paragraph.
There is enough information on the web as to the causes of cavitation, so I wont' get into it here. There is also additional info in our Tech Articles section. What is important is that you PREVENT IT through the use of supplemental Coolant Additives (SCA's) SCA's come in the form of chemicals which are added to the coolant, and monitored with test strips. Our IDI's require them, even though Ford doesn't acknowledge this fact very well. For normal Green low silicate coolant, the proper additive is Ford VC-8 or Fleetguard DCA-4, available from Diesel Injection Service, as well as other online sources. The test strips are also available there, and a guide for using the test strips is located HERE. An additional way of maintaining these chemicals is to install a coolant filter and use filters designed to dispense SCA's.

Q. What kind of coolant should I use then?

A. Contributed by Agnem...
This has been a difficult to answer question. This http://www.***************/forums/sh...ad.php?t=25499 discusses it pretty well.


edit: i can't link to that site apparently. oopse

'93 F250 7.3 idi turbo, ZF5, 2wd, excab, long bed.

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Last edited by jam0o0; 04-28-2010 at 12:20 PM.
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