01 7.3 oil in coolant?? - Ford Powerstroke Diesel Forum
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Old 02-10-2014, 03:04 PM
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01 7.3 oil in coolant??

Hi everyone,
just bought my first diesel and am new to this forum. I purchased a 2001 f350 with the 7.3 with 153000 on it. The previous owner said that the oil cooler o-rings were bad and needed to be replaced. Could this cause oil to get into my coolant reservoir? It looks kind of black in there. Is this very bad and a hard fix or is it simple?? Should I stop driving it until it is fixed or is it still drivable??
thanks everyone!
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Old 02-10-2014, 04:59 PM
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Originally Posted by BuckHunter25 View Post
Hi everyone,
just bought my first diesel and am new to this forum. I purchased a 2001 f350 with the 7.3 with 153000 on it. The previous owner said that the oil cooler o-rings were bad and needed to be replaced. Could this cause oil to get into my coolant reservoir? It looks kind of black in there. Is this very bad and a hard fix or is it simple?? Should I stop driving it until it is fixed or is it still drivable??
thanks everyone!
Easy fix for less than $100 in parts. You should probably quit driving it as all you're doing is making a making a bigger mess to clean out of the coolant side of things.
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Old 02-10-2014, 07:02 PM
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yes a failed cooler will do this.

you have to clean all the oil out of the block now....
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Old 02-10-2014, 07:41 PM
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Thanks for the responses guys! so do you think it is just the o-rings and gasket or should i get a whole new oil cooler? will i need to use some kind of special cleaner/chemical to flush out the oil in the coolant?
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Old 02-11-2014, 04:35 AM
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Originally Posted by BuckHunter25 View Post
Thanks for the responses guys! so do you think it is just the o-rings and gasket or should i get a whole new oil cooler? will i need to use some kind of special cleaner/chemical to flush out the oil in the coolant?
Just the gaskets and o-rings...the cooler itself is pretty stout. When people have diesel in their coolant they use Cascade soap...I don't know if it Cascade dishWASHER soap or what...but search that, it will give you the info you seek.
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Old 02-11-2014, 06:03 AM
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dawn...but same diffrence
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Old 02-11-2014, 06:06 AM
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Thanks guys appreciate the help!


Sent from AutoGuide.com Free App
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7.3l diesel, f350 7.3, oil cooler, oil in coolant, oil leak

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