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I am also possilbly looking at a new oil cooler, but want to try a chemical flush first. I have read the 6.0 flush manaul in the link provided, and it is super thorough. I was thinking of doing a modified version of it, in combination with the way powerstrokehelp does it on youtube. I have heard that some people on the forums aren't fans of his, but if the flush N fill is performed the way he does it, ie. running a large amount of water through the degas bottle (after thoroughly warmed up), would we still have to pull the block plugs? One of the main reasons I want to avoid the block plugs if to prevent having coolant draining everywhere. It would be easier to just collect from the radiator drain. At least on the first couple of flushes. Here is my step by step process that I am planning on using. Please comment if you see any major issues.
1) Open degas tank, and drain radiator through pet**** valve. Fill with tap water.
2) Run up to operating temperature, with heater on high.
3) Repeat step one and two until clear. Collect first two flushes for proper disposal. May also pul ThermStat for first series offlushes, and will reinstall for chemical flush.
4) Once relatively clean drainage is observed, fill with tap water. Add 3/4 gal of restore. ThermStat should be back in.
5) Drive at highway speeds for an hour.
6) Repeat steps 1-3 until clear using only distilled water.
7)Once clear, drain and add 3.5 gal of CAT EC 1 coolant. Top off with distilled water.
8) Check deltas. If not within spec, back flush oil cooler.
9) If ECT running high, back flush radiator.
10) If deltas still high, change oil cooler.
Does this sound ok?
My deltas are fine in stop and go traffic, 35-50mph and at idle, even when comming of the highway. But on the highway, at 65-70, they climb to 20-25 difference. Hoping to prevent having to change the cooler. Already have a full egr delete and headstuds done.
Last edited by surfmanrescue; 09-05-2012 at 07:14 PM.