05 6.0 oil cooler replacement help - Ford Powerstroke Diesel Forum
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Old 01-30-2014, 06:30 AM
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05 6.0 oil cooler replacement help

Ok I am going to be replacing the oil cooler on my 05 6.0. While I have it down I'm also doing stc fitting, dummy plugs & up pipes, egr delete, new ipr valve and intake gaskets. Now I'm also flushing my ford gold coolant out and putting elc in. I'm going to use restore and restore plus but my question is when should I flush the system since coolant flushes are known for clogging oil coolers? I sure would hate to plug my brand new oil cooler. Any help or additional info is greatly appreciated.
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Old 01-30-2014, 06:43 AM
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Flush before you put the new cooler in if its not to clogged and will let you. If you do the chemical flush after your gonna turn your new oil cooler into a filter set up.
Do you have a coolant filter on it now?
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Old 01-30-2014, 06:52 AM
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No I do not I was thinking about putting one on come spring time
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Old 01-30-2014, 07:01 AM
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And my other question is should I flush the system out then drain it and change the cooler with the system empty or should I flush it completely, put new coolant in and then replace oil cooler?
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Old 01-30-2014, 07:05 AM
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when you do a chemical flush you do not want the system sitting empty any longer then you can help. The inside of your motor will be bare steel and prone to rusting quickly.
What kind of temps (deltas) are you seeing?

Last edited by kinnisoj; 01-30-2014 at 07:06 AM. Reason: mistype
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Old 01-30-2014, 07:22 AM
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It went up to 22 degree difference going 70mph uphill with no load and I'm getting about 16 degrees going 65mph just cruising with no load
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Old 01-30-2014, 07:44 AM
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You should do your delta test on a nice flat road. Truck all warmed up and just crusing at about 60 mph. No uphill. I bet your temps might be getting close to the 15* mark but I bet you got sometime yet to let a coolant filter start doing its job.
And IMO you should reeley look into the bullet proof diesel oil cooler. Once its done you will be able to forget all about delta's...
With the oem your just starting back at the start of the book and you already know the ending.
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Old 01-30-2014, 07:46 AM
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Flush the hell out of it, put in your new ELC and drive her for a couple weeks. That should be plenty of time for your old oil cooler to grab the stuff you didn't get out with the flushes.
Then go for the oil cooler etc etc etc.
Consider moving up the schedule for your coolant filter. Might want to put it on when you do the oil cooler and all the other stuff.
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Old 01-30-2014, 07:58 AM
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Ok thank you I really appreciate the help. I just checked out some filter systems and didn't realize they were that cheap. I thought they were going to cost me somewhere around $500
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Old 01-30-2014, 08:00 AM
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Ive seen on here that some guys even build there own for cheaper.
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6.0, coolant flush, egr delete, oil cooler, powerstroke

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