7.3 Rebuilding ???
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Mountain Pass
Joined: Sep 2011
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From: Forest River ND
7.3 Rebuilding ???
Ok guys, I'm starting to put the old horse back together (with the factory manuals ). My Question is since this is a stock rebuild do I need to put in new injector cups? The heads have been gone through by the machine shop and they didn't want to touch the injector cups ( they have had problems with getting them to seal ). The motor has 167,000 on it and I'm thinking just do it but what are your thoughts? Clay looks like he has a good setup. Also will blue loctite be ok for the rod bolts, Oil cooling jet bolts etc? Oil cooling jets have been welded (thanks guys for that one ). 
Any tips or tricks would be great ( done alot of searching but may have missed something ) Thanks Ray
Any tips or tricks would be great ( done alot of searching but may have missed something ) Thanks Ray
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Mountain Pass
Joined: Sep 2011
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From: Forest River ND
Thanks Ted hope he chimes in.
Cargo Master
Joined: Jan 2009
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From: OKC, OK
The general consensus on cups is if the ain't broke don't mess with them. It's just like a plumbing job. Once you dig in it can cause more problems. If you didn't have fuel in the coolant before then they weren't cracked.
I did mine a year or two ago with no probs but if you don't get one to seal properly you will have to find out which one and re do it.
I did mine a year or two ago with no probs but if you don't get one to seal properly you will have to find out which one and re do it.
Posting Guru
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From: Dalton,Ga
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Mountain Pass
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From: Forest River ND
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Postmaster
Joined: Jun 2010
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From: Longview, TX
Man Ted, you throw my name out there like it's worth something lol
It's really a catch 22 in my opinion. It would be super easy to do with the engine out and dry. Shouldn't take 30 minutes to pull the old and re seat the new. Definitely get the mating surfaces clean with a wire brush or injector cup brush (clay has the ford part number for the brush in his instructions). You'd regret not doing it while it was out if you wound up with fuel in the coolant a few months down the road. Then again if you do it and one doesn't seal, now you've got a little bit of fuel and maybe even oil showing up, and you've got to figure out which one to look at and replace.
I think Roland or maybe Bob had talked about pressurizing the coolant system just a bit and looking for leaks or bubbles in each of the cups. I'd say put about 10psi on it and see if it leaks down any. I don't think you can hurt anything by doing that. If it holds I'd personally let it ride. If not, I'd replace them all, then retest after they have cured.
It's really a catch 22 in my opinion. It would be super easy to do with the engine out and dry. Shouldn't take 30 minutes to pull the old and re seat the new. Definitely get the mating surfaces clean with a wire brush or injector cup brush (clay has the ford part number for the brush in his instructions). You'd regret not doing it while it was out if you wound up with fuel in the coolant a few months down the road. Then again if you do it and one doesn't seal, now you've got a little bit of fuel and maybe even oil showing up, and you've got to figure out which one to look at and replace.
I think Roland or maybe Bob had talked about pressurizing the coolant system just a bit and looking for leaks or bubbles in each of the cups. I'd say put about 10psi on it and see if it leaks down any. I don't think you can hurt anything by doing that. If it holds I'd personally let it ride. If not, I'd replace them all, then retest after they have cured.
Trying to Gain Knowledge
Joined: Jun 2003
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From: Ezzell, TX
Jeff, I don't mean to throw you under the bus. You are the last one I have seen that has done this very thing recently. I knew you would have a good answer and that is why I told them you would chime in eventually. I will make sure to be kind when I do it.
Lead Driver
Joined: Sep 2005
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From: Norco,CA
[quote=jeffreyt;12720977]No no, I'm flattered lol. I wouldn't consider myself the best to answer anything, but I'm glad to help with what I've learned and know. Feel free to ask me to chime in on anything anytime.[/quot
Were the heads hot tanked? If so I would replace the cups, If not you would probably be okay, and they can be tested.
Were the heads hot tanked? If so I would replace the cups, If not you would probably be okay, and they can be tested.
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Mountain Pass
Joined: Sep 2011
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From: Forest River ND
[quote=Bonanza35;12722593]
NO They put them in a enclosed pressure washing station.
No no, I'm flattered lol. I wouldn't consider myself the best to answer anything, but I'm glad to help with what I've learned and know. Feel free to ask me to chime in on anything anytime.[/quot
Were the heads hot tanked? If so I would replace the cups, If not you would probably be okay, and they can be tested.
Were the heads hot tanked? If so I would replace the cups, If not you would probably be okay, and they can be tested.
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Mountain Pass
Joined: Sep 2011
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From: Forest River ND
Do you have a diagram or description showing how to do this? Thanks for chiming in I appreciate it, Ray