5.4L 3v Oil in Antifreeze * but no Water in Oil - F150online Forums



5.4L 3v Oil in Antifreeze * but no Water in Oil

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  #1  
Old 01-30-2011, 11:16 PM
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5.4L 3v Oil in Antifreeze * but no Water in Oil

I have a 2004 F150 FX4 3v 5.4L with auto transmission.

After numerous small problems in less than 5000 miles, now I have a new problem.

We had just put 5000+ miles on it pulling 5th wheel trailer. It was loaded and under a heavy load for all of it.

Now I have "Oil" in the Coolant reservoir. Not just a few drops but alot. Coolant is nearly black. It is Oil not transmission fluid.

Please note: NO water shows in the oil.

Pulled a few of the plugs and NO water or oil on the plugs either.

Any ideas of where to start?



Thanks
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  #2  
Old 01-30-2011, 11:58 PM
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Hydrocarbon test the coolant. If exhaust gasses are present, its a head gasket....
No issues the whole trip? Till you got back and noticed the oil..
Where the hell did you go that was 5k miles in one trip pulling a trailer?
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Old 01-31-2011, 12:19 AM
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Off topic but, i didnt know it was ok to tow a 5th wheel with an f150...Am i wrong?
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Old 01-31-2011, 12:33 AM
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Quote:
Originally Posted by munoxide View Post
Off topic but, i didnt know it was ok to tow a 5th wheel with an f150...Am i wrong?
Depends on how big it is. smaller 5th wheels can be pulled by the newer f150's just fine. Today's f150 could probably out haul a mid 80's f250. Every year the competition forces them to get more and more out of these trucks.
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Old 01-31-2011, 01:26 AM
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I planned on getting a exhaust gas check kit from napa on monday morning.

Unfortunetly where I live there are NO auto parts stores that are open past on sunday, unless I want to drive 50+ miles.

After I test I plan on flushing complete system.

How do you go about pressure testing this system, since there is no access to radiator; only through the resevior which has no pressure?

Yes the truck ran flawless most of the trip...I threw a code on number #7 after 1880 miles but had an extra coil with; so a quick change and it ran fine. (from car wash; accidently sprayed to much water on drivers side engine compartment)

Yes, we put on a bunch of miles in a short time. We live in Northern Wisconsin and make deliveries all over the US.

Currently truck has 178,490 miles

Just an FYI: We pull a 25ft 5th wheel camper
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Old 01-31-2011, 02:05 AM
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Originally Posted by jethat View Post
Depends on how big it is. smaller 5th wheels can be pulled by the newer f150's just fine. Today's f150 could probably out haul a mid 80's f250. Every year the competition forces them to get more and more out of these trucks.
Oh ok, ive never seen an f150 pulling any kind of 5th wheel before...Just didnt know they could.
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Old 01-31-2011, 03:26 AM
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My parents pull a 5th wheel with theyre 00 F150 sc 5.4L 4x4. Only about once or twice a year though.
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Old 01-31-2011, 09:45 PM
glc
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The degas bottle (reservoir) certainly is under pressure. The cap that screws on is a pressure cap. A standard pressure tester works with an adapter.
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Old 02-02-2011, 09:20 PM
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Its a head gasket.
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  #10  
Old 02-02-2011, 10:39 PM
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Originally Posted by Halverso_99 View Post
Its a head gasket.
Not saying you're wrong but, how does oil pass a head gasket? I know water can from the coolant ports but where does the oil come from?
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  #11  
Old 02-02-2011, 11:47 PM
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Possibly a bad head gasket but a good chance its the oil filter adapter gasket leaking. That gasket can go bad and the oil having higher pressure can enter the coolant system in that area. I would check it out first.
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