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Old 02-18-2013, 09:16 PM
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will be replacing injectors soon have quick question.

After removal bad before installing new injectors how do I prevent hydro lock from excess oil and diesel? Do I just put the key in with injectors out and turn it over a few tines or what. Thks for any help
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Old 02-18-2013, 10:09 PM
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you can vacuum out the oil thru the glow plugs and/or, with gp's removed, bump the starter, with the vc's lightly bolted down, so oil not shoot'n everywhere. I think what you wanna do, is remove the back injectors first to allow all oil/fuel to drain in those cylinders, so not all of them get filled up.
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Old 02-20-2013, 08:14 AM
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Remove glow plugs, place valve covers on heads, turn engine over by hand.
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Old 02-20-2013, 11:59 AM
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Quote:
Originally Posted by Greenman01 View Post
Remove glow plugs, place valve covers on heads, turn engine over by hand.
That is the easiest/best way to do it in my opinion.
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Old 02-20-2013, 08:06 PM
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Quote:
Originally Posted by Greenman01 View Post
Remove glow plugs, place valve covers on heads, turn engine over by hand.
How will I know how much to turn it over to remove all the fluids. Am I going to be able to see the fluids and thus be able to tell when empty or just turn it over a few times enough. Im just nervous since I heard you could hydro lock the engine. Thanks for the help.

So just to get it straight I pull glowplugs put in new injectors then put valve covers on and turn engine over by hand?

Last edited by yobie; 02-20-2013 at 08:14 PM.
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Old 02-20-2013, 08:19 PM
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5-6 full revolutions should be plenty. I will keep the injectors unplugged and crank the truck for about 5-10 seconds as well. I do this 2-3 times just for added assurance

there are write up on the procedure that can easily be found. I just put my 250/100's back in. Start to finish taking my sweet time only took 5,5 hrs. this includes cleanup, burning new tunes, getting fired up again, etc.

This is a quick run down of how I did it this time:
remove air intake and intercooler tubes.
disconnect big connector on driver side valve cover, removed ccv, pulled valve covers on both sides.
unplugged vc gasket and wires to gp's/injectors.
removed injector #8 and let drain. Sucked out injector cup
removed injectors 2, 4, 6 and glow plugs on drivers side. sucked out remaining fluid from cly8
put in new injectors on driver side

removed inj #7 and let drain, sucked out
removed inj 1,3,5
sucked out cyl 7
removed glow plugs on pass side and installed new injectors

put both vc gaskets and covers on and put in 1 bolt on each side.
1" socket on crank bolt and turned a good 5 fell revs, cranked with key/starter a couple times for 5-10sec's
pulled covers, cleaned off gps and reinstalled
hooked up gp/injector wiring, put everything back together.
pulled fill plug for hpop. added a good qt or so of oil.
with everything back together, cycled key a few times to let fuel refill the fuel rails. cranked for approx 5-10 sec's, stopped for approx 5 sec's, then cranked again for a few sec's till the truck fired up.( I find that if you do not add quite a bit of oil to the hpop you will have a harder time getting the truck to fire back up)
went for a test drive and to warm up the motor. Came back and changed the oil after warming up. You want to change the oil because fuel gets mixed with the oil during this procedure.

No issues and I can always get the truck to fire back up pretty quick. others have issues getting the truck started again. You also want to run the truck pretty hard for approx 25-30 miles to purge any air out of the system. If you do not do this, you will continue to have longer starts till the air get out. Best of luck

Last edited by INFRNL; 02-20-2013 at 08:37 PM.
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Old 02-21-2013, 04:06 PM
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nice write there short and sweet with alot of information thanks
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Old 02-27-2013, 11:37 PM
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Quote:
Originally Posted by Greenman01 View Post
Remove glow plugs, place valve covers on heads, turn engine over by hand.
^whs, I always turn it over a few times by hand and then use the starter once to do it. Then even when I put the glow plugs back in it turn it over by hand at least 1 full rotation to make sure there isn't anything in there.
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Old 02-28-2013, 12:43 AM
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will be replacing injectors soon have quick question.

I just pull the gp's and spin her over. But I bet with all these replies you will figure out a way :p


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Old 03-08-2013, 10:13 AM
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I wasn't planning on changing the glowplugs. Would it be effective to just leave the glowplugs in with the new injectors in and turn it over by hand to clear the oil/diesel? Or is it a necessity to remove the GPs and then turn it over.
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