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Old 09-28-2013, 06:58 PM
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oil cooler? coolant and oil mixing

So I just recently bought my truck about 5 weeks ago. It's a 2006 6.0 Lariat, all stock. Absolutely loved the truck until I looked under the hood. I checked my coolant and there's definitely oil in it and I have a small amount of coolant in my oil. I know the dealer had just replaced the EGR valve before I purchased it, and had said that there are absolutely no problems with the head gaskets.

When I had gone to my home state for labor day weekend after I purchased the truck, my friend ran an OBD just to see if anything would pop up. And of course, something did. Code P012F, oil cooler. Could the oil and coolant mixing cause this?

I work at an auto shop so I'm planning on getting a coolant flush and getting the oil changed in order to travel 40 miles to the closest Ford dealer on Monday. All the diesel mechanics/repair shops around where I live specifically only work on Cummins. I have a 5 year/100,000 mile full coverage warranty on the truck.

Please let me know what you guys think. I've had many friends who've had diesels, but this is my first one. Best advice would be great. Thanks!
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Old 09-28-2013, 07:24 PM
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The code is there because the temp difference between EOT and ECT are at or past the max Ford parameters. Since you have oil and coolant mixing, you definitely need a new oil cooler. Would be a good time to do a complete coolant flush and add a coolant filter as well.
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Old 09-29-2013, 03:19 AM
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Quote:
Originally Posted by recklessprincess View Post
So I just recently bought my truck about 5 weeks ago. It's a 2006 6.0 Lariat, all stock. Absolutely loved the truck until I looked under the hood. I checked my coolant and there's definitely oil in it and I have a small amount of coolant in my oil. I know the dealer had just replaced the EGR valve before I purchased it, and had said that there are absolutely no problems with the head gaskets.

When I had gone to my home state for labor day weekend after I purchased the truck, my friend ran an OBD just to see if anything would pop up. And of course, something did. Code P012F, oil cooler. Could the oil and coolant mixing cause this?

I work at an auto shop so I'm planning on getting a coolant flush and getting the oil changed in order to travel 40 miles to the closest Ford dealer on Monday. All the diesel mechanics/repair shops around where I live specifically only work on Cummins. I have a 5 year/100,000 mile full coverage warranty on the truck.

Please let me know what you guys think. I've had many friends who've had diesels, but this is my first one. Best advice would be great. Thanks!
Your oil cooler failed (ruptured) forcing oil into the cooling system due to the pressure differences. If you purchased from a Ford dealer, they should have caught this. Also, if it had the latest engine flash it would have thrown a "wrench" symbol in the dashboard notification center, as the DTCS you found was due to there being more than a 15 degree temp difference between ECT and EOT.

Take the truck only to a shop that works on power strokes. These are a different beast than a cummins
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Old 09-29-2013, 04:06 AM
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At the moment, I have no dash lights on. The wrench symbol came on once but disappeared as soon as I shut off my truck. She runs fine and sounds fine. Unfortunately, I didn't purchase the truck at a Ford dealer. It was bought at a mom and pop place.
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Old 09-29-2013, 07:53 AM
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Quote:
Originally Posted by recklessprincess View Post
At the moment, I have no dash lights on. The wrench symbol came on once but disappeared as soon as I shut off my truck. She runs fine and sounds fine. Unfortunately, I didn't purchase the truck at a Ford dealer. It was bought at a mom and pop place.
I would get on the phone with the warranty company ASAP. Make sure you can take it to a shop familiar with 6.0s and I'm sure they will fix ya right up. It is quite a job to clean the Mayonnaise (oil & coolant mixture) from the cooling system. I would get it in ASAP and would not drive it until you can get it in.
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Old 09-29-2013, 08:52 AM
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I'm going to a Ford dealer that works quite frequently on diesels and is well known and friendly. Thank you everyone for the advice!
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Old 09-29-2013, 04:37 PM
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Originally Posted by recklessprincess View Post
I'm going to a Ford dealer that works quite frequently on diesels and is well known and friendly. Thank you everyone for the advice!
Keep us posted!
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