Replaced injector cups coolant overflowing - Ford Powerstroke Diesel Forum
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Old 03-09-2013, 04:30 PM
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Replaced injector cups coolant overflowing

I replaced my injector cups, injector o-rings, and glow plugs today. I was performing a coolant flush and within 45 seconds of the truck being on, my degas bottle over pressurized and overflowed.
I then shut the truck off and let some air out of the fill cap. Restarted the truck and it did not overflow, but air bubbles kept coming up.
I drained the coolant after the flush. Filled with good coolant and it overflowed right away.
Did I not seal a cup right? That's the only thing I can think of.
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Old 03-09-2013, 08:14 PM
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I would be surprised if you installed them incorrectly, I don't think they are very picky. Is the antifreeze being contaminated with anything? or is it just pressure making it blow off?

Did you clean the heads really well when you took the cups out? you used green sleeve retainer right? made sure they were all the way bottomed out?
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Old 03-09-2013, 08:19 PM
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Replaced injector cups coolant overflowing

Why were you replacing the cups to start w? What were you trying to resolve? I've only had 7.3do this when head gaskets were blown


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Old 03-09-2013, 09:28 PM
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Re: Replaced injector cups coolant overflowing

I had diesel in my coolant. That's why I did injector cups. Never had this overflow problem until I changed the cups.
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Old 03-09-2013, 09:29 PM
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Re: Replaced injector cups coolant overflowing

And yes I used the green retainer
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Old 03-11-2013, 05:01 PM
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Re: Replaced injector cups coolant overflowing

Well Im going to rip it appart again tomorrow with the help of a real mechanic. I pray its just a cup not seated right. If not is anyone interested in a 97 f350 with a blown head gasket? Ha
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Old 03-18-2013, 11:01 AM
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Re: Replaced injector cups coolant overflowing

It seems that I didn't get two of the cups all the way seated. The injectors to these cups are black as coal. I also blew some air into my degass bottle through the hose that goes to the radiator. These cups had some bubbles emerge so I think I've got her figured out. I hope... Off to ford
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Old 03-19-2013, 05:59 PM
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Re: Replaced injector cups coolant overflowing

Well its all back together. I'm not blowing coolant all over the place at least not yet.
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Old 03-20-2013, 08:40 PM
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Good to hear!
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