IP questions.

[KodiakForge]

Hi all. I have an 88 7.3l zf-5 speed with a fuel/air leak from my automatic advance at bottom of pump. As funds allow I was thinking about swapping it out with a used one. I Found some at the salvage yard but the numbers came up for 6.9l some for automatic and one for manual. Based on the disassembly/reassembly manual model number id page they don’t exactly match what’s in my truck. Currently what’s in my truck is db2831 4632

What I’ve found at the yard are
Db2 4370 Manual trans
Db2 4541 Auto
Db2 4369 Auto

Curious if these would work on my truck and which one would you choose? As the numbers don’t lay out the same as in the manual.
I know a junk yard pump might not be the best place to source a pump but it’s whats in the budget right now. I Have a rebuild kit and was thinking I’d i could swap it out and rebuild the current one in that’s leaking.
I imagine the 6.9 & 7.3 pumps are interchangeable but this would be my first rebuild of this pump. Any info or tips would be appreciated.

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[Thewespaul]

The one with the red badge. Any of those will work for your engine but that one looks like it’s been gone through recently

 

[KodiakForge]

Ok. And as far as automatic to manual applications that doesn’t matter so much? Or does it? The one with the red badge was an automatic as it had the variable vacuum switch though I grabbed it for my other truck before photo. Thanks

 

[Thewespaul]

That pump is setup for a C6. Swap the hardware from your old pump and you’ll be set

 

[IDIBRONCO]

You won't have to switch anything since you have a manual transmission. You could if you want to though. Either way, will work. I've heard of people locally talk about putting a seal kit in their pumps. I always tell them that from my experience, when a seal starts leaking, there's usually enough wear on other parts that it's time for another pump. I don't know what your rebuild kit contains, but if you feel comfortable enough, then go for it.

 

[pelky350]

Just get the best looking pump you can find in a nicer looking truck for the best chance at scoring a decent pump. If it looks like it's been sitting it will likely have issues from old fuel.

 

[KodiakForge]

Alright. Thanks for the quick responses. I grabbed two of the nicest ones I could find. The kit I bought is just a complete seal kit o-rings, gaskets, bushings and some small hard parts (pins and clips) is there a more complete kit I could use? Going to tear one down just for education purposes and try the nicer looking one in my truck.

 

[pelky350]

Well rebuilding a pump your going to have to have it calibrated on a giant machine otherwise you'll never know what it's putting out and when. Could be barely any fuel or could have tons of fuel. Yes you can take it apart and put it back together with new seals and stuff but it has to be calibrated on a test stand to peform in any way.

 

[KodiakForge]

True, I’m aware of that. I figured I’d have Oregon Fuel Injection calibrate it. I’d be interested in knowing how much something like that costs, Haven’t called them to inquire yet but I’m about to get the ball rolling here soon.

 

[79jasper]

Many times, a shop may not touch it, if you've had it apart.
(I wouldn't)

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[KodiakForge]

Hmmm well that’s an interesting point. I guess I can see the reasons behind that. Sounds like I have some things to figure out. Thanks.

 

[79jasper]

Also, you would Likely get charged for a new seal kit anyways.

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[KodiakForge]

So it sounds like I may be taking the long way only to end up at the same place i would if I just buy a new pump?

 

[79jasper]

Likely somewhat close.

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[KodiakForge]

Well I found a place that will calibrate it for $150-250 including some inspection to make sure it doesn’t ruin testing equipment but if it ruins something the cost is on me I already have one disassembled at home (to learn basically) it wasn’t all that hard or complex but I’m curious though, what inside the pump could damage the equipment during testing? I ask only to further my understanding as all of this has been a learning experience. How risky would it be to have them Test a pump I did? How likely is it to have issues while testing I’m following the service manual step by step. Where is one likely to make a mistake or run into issues? Thanks for the enlightening responses