Hi, I'm new to diesels.

I acquired the 96 F350 7.3 Power Stroke Diesel about a year ago. At that time the mechanics that performed the engine check identified something in the air intake they had not seen before. They also said it was non-functional due to it being wired open.

A bit of research later... I identified it as a "positive air shutoff valve" made by RodaDeaco .


Due to:

• the unavailability of parts,
• the fact that its not functional,
• and its replacement being > 2k

I want to leave it off when I take the valve cover's off to replace the glow plugs.
The challenge being, I don't know what the intake looks like without it nor where I might be able to get the parts I need {Yes, I'm familiar with the local pull it off parts lot [though they haven't had any similar vehicles in the last year]}.

suggestions?

here are a few pic's to show you what I'm talking about.




Air intake valve from drivers quarter panel





Air intake valve from over radiator





Air intake valve from front of turbo





Air intake valve from drivers side of turbo





Air intake valve from drivers side of turbo closer





Air intake valve from passenger side of turbo

 

that is really odd...never seen that. if you are mechanically inclined then i would suggest find a part out on Craigslist,Fleabay,junkyard etc from a 94.5-97 truck like yours and get the whole intake system from turbo boot to filter(including the CCV) remove and replace with the stock system and disconnect any wires that come off of the old system. Good luck!
Edit: someone on here could have the stock intake system and you could get it from them. also while your working in the engine bay give it some lovin', its looking very dirty and you could be missing an oil/fuel leak, lost in the dirt.

 

Wow that's bizarre!
You need a riffraff inlet boot and somebody to sell you a ccv housing...stat!

 

I think ive seen this before, its a propane conversion for gassers, guess someone tryed to do Frankenstein propane injection

 

I looked it up, and I am sure you already know this but for the rest of us, it is an emergency shut-off valve designed to shut the truck off by occluding air. I guess it helps prevent a run away engine. I find an odd addition to a powerstroke but I know some companies have odd requirements when purchasing a truck.

Looks like you need an intake boot and there there is supposed to be an intermediate metal pipe between the black hose you have and the intake boot. It is hard to tell if you have the crank case vent housing on the valve cover or not. If not, then you will need one.

 

I do see the ccv on top of the valve cover. I've taken a photo of my 97 7.3. You need the aluminum intake that's mounted to the bracket and the tubing from it to the turbo. There is a 90 degree 7/8" piece of hose that goes from the front of the ccv to the underside of the aluminum intake.




Here's the stock set up on my 97 PS.

 

Hi Sean, while I wouldn't say I was necessarily mechanically inclined, I'm not afraid of digging into my vehicles either {my last project}.

Yes, it feels like a cleaner fix to uptain the whole intake just not sure it's going to work out that way. Especially considering my search in all yards for 94-97 F#50 SD's on row52 only show's two, in Michigan...

Agreed, I don't really like how accumulation has occurred in the engine bay so I'll be giving it some TLC. thanks

Correct, sorry thought my calling it a "positive air shutoff valve" was sufficient enough description.

It sounds like your intermediate metal pipe is what DDPJ calls the aluminum intake? Yes, the crank case vent housing resides on the valve cover.




crank case vent housing



Yup, I have the ccv on the valve cover. ;-)
another affirmative, the 7/8" hose is also present



7/8" 90 degree tube

ah, this photo also shows the valve wired open.

Awesome photo DDPJ, show's me what its supposed to look like.

As far as I know, except for this intake valve, my truck be stock as well.


OK, assuming I have appropriately assimilated the lists wisdom, I'm looking for:

• intake system from {air} filter to turbo

or

• aluminum intake,
• tubing from aluminum intake to turbo and
• clamps of appropriate size.

thanks for the insight's.

 

The local Ford parts department was kind enough to print the parts page that shows the turbo and the parts that connect to it.




Turbo and connecting parts diagram

They also noted that Ford no longer makes the "Orange Hose" so my only option from them was the "Black Hose" replacement kit. Ford part # F7TZ-9C681-AA.

A little online research turned up AutoNation Ford White Bear Lake willing to sell said item for significantly less than my local dealer.

 

Go check riffraff diesel they have a superior replacement for the orange boot.

 

Ford OBS 7.3L Powerstroke Turbo Inlet Tube Kit F7TZ-9C681-AA

Same kit from Pure Power Diesel for a little less. Pretty much has everything you will need to convert it back to the stock system with the black turbo inlet piece.

 

You want this intake boot from Riffraff Diesel. Much less than the Ford, and then I am sure someone on here can help you out and give you a CCV housing.

Riffraff Diesel 94-97 Turbo Intake Boot - Ford 7.3L

 

I'm sure the quality of the replacement boot is superior. I went with the single source of parts for the time being. When, what I got, wears enough to warrent replacement, I'll see about using this part.

Yes, beats the price from the local Ford dealership. However, comes up a bit short of the price I got from the dealer in Minnesota...

 

How much internal pressure does this hose get exposed to? I ask because where mine bends there is a bulge.



hose bulge

If this were a cooling system hose, I'd replace it without thinking about it. Thoughts?

thanks

 

None of the local parts places {including Ford dealer} had what the diagrams listed as this part. During the installation of the orange hose replacement kit, I realized it came with its replacement. It is significantly shorter (3ish inches with a 90 degree bend) and stiffer so if I had acquired its replacement it may not have worked.

As of yesterday afternoon, my intake valve replacement project is completed.



thanks for the help.

Mike

 

Tymar Intake with replaced orange turbo housing hose using Ford F7TZ-9C681-AA - HOSE - AIR INLET.