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Old 10-11-2017, 10:52 AM   #41
Mini-Skoolie
 
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Join Date: Jan 2017
Location: Texas
Posts: 41
Year: 1997
Coachwork: Turtle Top
Chassis: Ford E350
Engine: 7.3
Turbo Overhaul ....

So I finally got ambitious enough to do some much needed work to my bus. The plan was to overhaul the turbo, delete the EBPV, replace valve cover gaskets/harnesses, and replace the exhaust studs and add manifold gaskets. All in one session.

Needless to say, things didnt go as planned.
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Old 10-11-2017, 10:59 AM   #42
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Year: 1997
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The head rounded off on the first exhaust stud I tried to remove, so that ended that idea. I also ran into some trouble up top so I decided to stop doing anything before I got to a point where I was stuck

Maybe next year I will pull the engine and do everything on a stand.

The only thing I did get done was the turbo overhaul and the EBPV delete. Getting the EBPV gone cleared a check engine light and the new impeller makes a huge difference in how it runs. As a 5 ton beast its not a rocket ship but it sure makes a difference in roll on performance.
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Old 10-11-2017, 10:27 PM   #43
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Year: 2002
Chassis: e450 super duty
Engine: 7.3l ford powerstroke
That exhaust manifold stuff sucks donut.? pulling the engine sounds like you are going to lift the entire cab off.? yikes...!!! I did not know riff raft sold that resistor piece for the ebpv senor I am ordering one right now. I do wish I had your passenger door.
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Old 10-12-2017, 09:33 AM   #44
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I wont have to pull the whole cab off. Remove the hood, radiator support, etc etc etc. then lift up and forward. At least that's the idea. I've talked to a number of diesel techs who say that's the best way to work on them. Then I will do the oil pan and a few other things while I have it out. Maybe I should start picking up some bigger injectors while i'm waiting.
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Old 10-12-2017, 09:38 AM   #45
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Join Date: May 2009
Location: Columbus Ohio
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Year: 1991
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Chassis: International S3800
Engine: DT360
Rated Cap: 7 Row Handicap
are turbos on the 444E's the same as on the fords? Garret? did you upgrade the impeller? more boost? or was it just worn and needed replaced.
-Christopher
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Old 10-12-2017, 11:19 AM   #46
Mini-Skoolie
 
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Location: Texas
Posts: 41
Year: 1997
Coachwork: Turtle Top
Chassis: Ford E350
Engine: 7.3
The impeller was very worn and pitted. The new one has 2 more vanes on it than the old one. As for your turbo question, yes it is a Garrett. As far as I know they are the same.

I did a simple online search for a 1997 E-350 7.3 turbo overhaul kit.

http://www.amazon.com/Powerstroke-GT...bo+rebuild+kit

http://www.amazon.com/Non-EBP-Turbo-...troke+pedestal

http://www.riffraffdiesel.com/ebp-pe...pigtail-94-97/
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Old 10-12-2017, 01:07 PM   #47
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at least im lucky in the respect that my bus is southern so there was no EBPV on it. and the ECM concurs.. it was disabled in the programming. I need to get an EGT gauge on mine before I try any turbo or ICP hacking.. just to see where its at stock..

-Christopher
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Old 10-12-2017, 03:30 PM   #48
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Chassis: e450 super duty
Engine: 7.3l ford powerstroke
That will be one hell of job to pull the motor.!! From what i heard the only wy to get more boost from these turbos is upgrading the fuel system since they do not have a wastegate. larger injectors will be nice but i think would be expensive & pontless unless you are planning to do a complete fuel system overhaul.
bore banjo bolts, stiffer fuel regulator spring. remove tank filters, tune. etc etc..!!
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Old 10-12-2017, 07:20 PM   #49
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Join Date: May 2009
Location: Columbus Ohio
Posts: 7,191
Year: 1991
Coachwork: Carpenter
Chassis: International S3800
Engine: DT360
Rated Cap: 7 Row Handicap
with a HEUI engine you can fuel heavier with higher HPOP pressure, the solenoid timing will remain thesame, however the plunger doesnt bottom out on the fuel shot.. the newer injectors are split-shot so the fuel rail can re-charge slightly as the shot stops and starts again..

the 72 PSI spring was standard issue on the Navistar version late 99 and after.. mine was one of the last to not have it.. i installed it and it made a difference in daily drivng as well as noise..
-Christopher
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