Considering DD'ing 350k mile LB7?

fl0w3n

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Hmm, maybe I just need to spend the time and clean mine up... but then it’s still going to have all the Cali connectors and I just removed that stuff.

Can I buy just the rubber boots for the connectors? What plastic loom did you guys use to redo it?
 

fl0w3n

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Okay need help with another part ID

I think I remember this hooking into the egr/emissions junk with the little tube, and then maybe connecting to the valve covers?

But I can’t figure out where.

0yvMuxW.jpg
 

2004LB7

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Crank case vent tube. It sits on top and connects driver side to passenger. The smeller tube I think was for egr or baro. I forget
 

fl0w3n

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Hmm, I’m not putting the vacuum pump back in. I was wondering what to do with #9 in the diagram.

So do I just Tee the two valve cover breathers together and let it dump under the cab?
 

fl0w3n

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What is this for? It’s part of the charging/alternator system right?

Pink wire/blue shield goes to the terminal on the left, and alternator goes to terminal on the left?

fO1yVG0.jpg
 

2004LB7

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Hmm, I’m not putting the vacuum pump back in. I was wondering what to do with #9 in the diagram.

So do I just Tee the two valve cover breathers together and let it dump under the cab?

I thought #10 was the pcv valve. I don't think you need to remove it. It vents to the atmosphere anyways
 

fl0w3n

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I’m pretty fricken close, I should be firing it up this afternoon... just a few more harness connections, front stack, fix the fuel lines on the chassis, oil change, and maybe I get the lift pump today.

But... few more questions first. Two more connectors I don’t remember, and a grounding post that I don’t remember where it grounds to. Also, what is the thing in the last pic?

Qqx3LdM.jpg


SH2errX.jpg


RCb5Ddr.jpg
 

zakkb787

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Sep 29, 2014
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First pic is MAF sensor that goes into your air intake tube. Second, not 100% sure but looks to be maybe MAP sensor if it’s not already hooked up. Watch for that wire with a ring terminal laying on your passenger manifold. Looked to be maybe a glow plug power wire.
 

fl0w3n

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Doh. I kept thinking the top one was for something on the intake but I for some reason I forgot the maf sensor.

Realized middle one is for the WIF sensor, but I have a delete plug. Yeah I hadn’t finished hooking up the glow plugs. Just did that now.

Last one, I’ll just ground nearby then.
 

2004LB7

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I think your ground connects to a bolt on the back side of the head just below the glow plug module. Don't ground it to the valve cover because the gasket/silicone may provide to high resistance. The path will be through the small fasteners vs the head having very good contact with the block
 

fl0w3n

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The big ground is in back of the head yes, but that little ground post I was pointing to in the last picture is what I was asking about. I just ground it to the firewall.


I swapped to a Federal y-bridge and it looks like it doesn’t have the mounting holes for that PVC Wye tube. Can I just run some 5/8 heater tube and a tee to the pcv valve below the alternator?
 

2004LB7

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What you are pointing to is the main power to the glow plug module not a ground

The T idea sounds fine to me. You can run it to #12 in the diagram above
 

fl0w3n

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What you are pointing to is the main power to the glow plug module not a ground

The T idea sounds fine to me. You can run it to #12 in the diagram above

Ah okay I see now.

That’s what I thought, at least for now. There’s some stuff I’ll want to redo in the future.
 

fl0w3n

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So after $200 in oil and coolant I nearly got it ready to be started yesterday, but turns out the federal Y bridge and Cali Y bridge are indeed different so I need a new intake boot. However I can’t seem to find one/the part number. Anyone know?

Also at some point during the rebuild I got my Blackstone labs oil analysis back. I had taken the sample months before, I don’t fully recall when. But they said they couldn’t even give me an analysis because of how much fuel was in the oil.
No good... now I’m hoping I didn’t wreck the bearings running it like that.

When I do go to startup, anything I should do special after sitting so long (months) and the injectors/CP3? I was thinking of hooking up my starter trigger and cranking a bit with the ignition off to prime the oil a bit? Also won’t have the lift pump in yet, so I assume lots of priming with the stock primer to get fuel to the CP3?