Changing Injector cups - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 02-25-2014, 05:45 AM Thread Starter
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Changing Injector cups

Gentlemen,
I am taking on the task of changing out the injector cups in my 1999 F350 due to fuel in my coolant. I have read the many posts you guys have discussed this on and got a lot of great info from these. I am new to working on diesels so I am learning a lot. I worked on it about 2.5 hrs last night and got all the injectors out. I removed 7 and 8 first to allow the fuel/oil mix to flow to those cylinders as I read to do. I did remove the oil plug to drain the rails also. I then made up a suction tool to get the fuel mixture out of the cylinders. I got a decent amount out of #7 cylinder but nothing out of any other cylinder. I believe 8 was a top but nothing at all from any other cylinder. Is this normal? I will start to remove the cups and start the install tonight. I just want to be extra careful not to leave any fluid in the cylinders. I also read to turn the engine over by the crank bolt a few times after installing the injectors. Is there any thing else I can do to make certain I don't hydrolock the engine from leaving fluid in the cylinders.
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post #2 of 5 Old 02-25-2014, 06:03 AM
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I usually pull the GP's out of any cyl. I pulled inj's from and turn it 2 revolutions by hand then with the starter (lay a rag/sheet over the heads to catch oil) to finnish it what way and also pull the idm fuse so it dont start.

most will say the sucking out and rotating is enough but I like the piece of mind

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post #3 of 5 Old 02-25-2014, 06:09 AM Thread Starter
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Do I install the injectors before doing this or does it really matter?
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post #4 of 5 Old 02-25-2014, 06:12 AM
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dont matter, just do enough cleaning till you think you got it all out. It dont really matter how you get r dun just as long and no oil (and in your case fuel, antifreeze, ect) is in of the cylinders and you feel good anout it.

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post #5 of 5 Old 02-25-2014, 06:40 AM Thread Starter
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Ok, Thanks for the info!
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