Coolant flush before/after-studs, egr, oil cooler? - Ford Powerstroke Diesel Forum
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Old 11-10-2011, 03:54 AM
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Coolant flush before/after-studs, egr, oil cooler?

I just got a steal on a 04 F250. I am pretty sure it need studs. I am going to bulletproof while I have th cab off. The guy before me put regular old anti-freeze in it and clogged the oil cooler up and replaced it and the egr cooler. I am gonna say that some was left in the motor and more got in the cooler. So I am going to replace everything again while I am in there.

My question!

Should I flush good and just put distilled water in on the last flush before I tear into the motor? I figured since I would have everything else off that it would do no good to put the ELC in before.

Or should I just wait until I am thru with everything? Mye be some left in still and I do not want to stop the cooler up yet again.
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Old 11-10-2011, 06:40 AM
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use the two chemical flush, then put the elc in to stop the block from rusting internally while you do the repair. Even distilled water will help start the rust in the cooling system. You need the coolant in there to stop it.
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Old 11-10-2011, 06:44 AM
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I would do it before.
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