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Old 01-18-2014, 11:19 AM
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HELP!! Oil in coolant tank...

Ok 2000 F350 7.3. I was doing a oil/tirepressure/water over all checkup sat and when I took the cap off the coolant tank all I was was a black sludge. I stuck a rolled up rag down into the tank and all I brought out was a black sludge. So it seems that oil is getting into the antifreeze at some point or could it be fuel in my coolant? There is no sign of water in the oil. Is this a common problem, or could I have a major issue?

Last edited by LOW96HB; 01-18-2014 at 11:40 AM.
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Old 01-18-2014, 11:30 AM
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most likely your oil cooler finally went.
the seals go bad when it gets cold.

you can either rebuild it (70 bucks) or buy a new one.
i think dieselorings sells everything you need
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Old 01-18-2014, 12:15 PM
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X2 on oil cooler. Don't be too alarmed. It's a fairly simple job

The reason you get coolant in the oil but not the other way around when the oil cooler fails is because the oil is at a higher pressure in the cooler. So if the internal seals fail the oil pushes past to where it shouldn't be.

You will also need to replace your coolant flushing the block many times
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Old 01-18-2014, 12:44 PM
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ya i forgot to add in the flush takes a while lol
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Old 01-18-2014, 03:55 PM
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Alright nice...I think. Is there any specific flush that you all recommend, or just use water or ???? I have been looking on utube and the net and It doesn't seem like too bad of a job, just takes time...Thanks guys...
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Old 01-18-2014, 04:14 PM
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Simple green. had to use 7 gal.'s to get it all cleaned out. found out thats how our local ford dealers do it.
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Old 01-18-2014, 04:17 PM
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Note: regular household water can be used for flushing and distilled water when you refill your clean system. Theres alot or great flush vids on youtube.
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Old 04-11-2014, 04:40 PM
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Well guys I finally got around to fixing the seal leak. I ordered the parts back in Feb and due to the cold weather and other thing that seems to keep me busy I fix my truck this afternoon. Yes me and my 11 year old son fixed my truck...He was there for 2 main reason..1. to hand me tools. 2. To keep ole dads mouth from running away when stuff just didn't go like the multiple videos that I watched on how to do this " simple " job...and yes he got his hands dirty too.. Thanks for the input back when I started asking about this. Also it took us about 3.5 hours.....
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