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Old 03-07-2012, 06:33 PM
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New oil cooler, now milkshake again:((

Just replaced the oil cooler in my sister n law's excursion, it was done last year after she filled it full of sludge and after about 15k it did the same thing.. I replaced the oil cooler and flushed it a bunch of times with distilled and vc-9.. It has egr delete, and amsoil st3 bypass kit.. This new cooler has about 300 miles on it, this morning she checked her coolant reservoir, had about an inch of oil floating, checked her oil, and it was barely on the dipstick, How likely would it be to have another oil cooler fail? Or how could i test the gaskets or heads to determine which side? The oil cooler i just pulled out was cavitated really bad and had holes ate into the cast, so there's no telling what else looks like this, i replaced the water pump and the front cover looked good but could the heads look like this? My question is where would this be coming from? and how bad is it to remove the heads with the cab on? just remove the evaporator box? or would i have to lift the cab?
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Old 03-07-2012, 06:51 PM
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Did you flush it with the front and rear heaters on? It's an ~8 gallon system with the rear core.
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Old 03-07-2012, 10:54 PM
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To start with VC-9 will not cut the oil you need a gallon of Restore it cuts the oil then flush alot, Electrasol Dishwasher Detergent something that cut the oil flush alot plus all the hoses should be changed the oil will eat them up in time, radiator should be pulled and clean along with the heaters it is a big mess.
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Old 03-08-2012, 05:12 AM
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The first time when everything was so clogged up I used dishwasher detergent and used a little bit of air to blow a passage thru the radiator, then I had her take the radiator to get it cleaned and we flushed it with just well water and simple Green about 10 times and thought it was clean, then I used the vc-9 and distilled and it was black when it come out, and about 8 distilled flushes later it was clean, so now that u say that about the rear heaters, I never even thought of that an I wonder if the other guy did last year, but I replaced all hoses, waterpump and t/stat.. But she thinks it's low on oil, but I also installed the amsoil oil bypass and I'm hoping that's where one or two quarts went, but with there only being 1 inch of milky water on top of clean antifreeze I'm hoping it's just the sludge that was from the back heaters, but ill check it out this wknd and cross my fingers lol.. Thanks again!! The rear heaters never even came to my mind..
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Old 03-08-2012, 05:13 AM
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Could I just turn the rear heaters on and then drain it or is there some other t/stat I will have to remove to get all 28.5 quarts out?
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Old 03-08-2012, 07:20 AM
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Turn the front and rear to max heat while you're flushing. I put the fans on low to make it bearable while I drove. There's no other thermostat than the one on the engine.
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Old 03-08-2012, 07:22 AM
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Also, fwiw, it took me 50 gallons of distilled water before it ran clean on mine. They looked at me like I was crazy at Walmart getting 50 gallons of water and 4 bananas.
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Old 03-08-2012, 07:46 AM
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Quote:
Originally Posted by bigric View Post
Also, fwiw, it took me 50 gallons of distilled water before it ran clean on mine. They looked at me like I was crazy at Walmart getting 50 gallons of water and 4 bananas.





funny I know how that is when you can fill up a whole cart of water. People start looking at you weird
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Old 03-08-2012, 06:07 PM
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I remember your thread from before with the pic of the serious oil cooler cavitation.

something else is going on with this vehicle, unfortunately it's too hard to say without actually seeing it. Are you sure there is no damage to the front cover behind the water pump?
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Old 03-08-2012, 06:17 PM
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Haha bigric same here, I flushed two at the same time and cleared the Walmart here out of distilled lol..

Yeah sinner this is the same one, I'm starting to wondering if the last guy that did it flushed the back or if she drove around for a year with a small amount of sludge in there, but this morning she drained the milk (not sludge yet) out of the degas and filled her radiator hose with hot water and simple green and ran some errands and after sitting for 3 hours it was still just water in the degas bottle so she's bringing it back up here right now, so in the morning I'll check to see if that oil settled to the top again and maybe flush it again with vc-9, but yeah I changed the water pump and the front cover looked good as far as I could see, but yeah that cavitation scares me too, what else inside is looking like that oil cooler.. But I'm hoping that little bit of oil was from the rear heaters and I don't have a hg problem or anything else, it's only got 80k on it but runs like a champ
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