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Old 06-21-2012, 09:05 PM   #1 (permalink)
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Default Oil leak

Hi everyone, I was doing a search on oil leaks, and it appears that a common oil leak on these cars (my mothers is a 2004 with a Duratec, 102k miles) is the oil pan gasket. However, I have ruled the pan gasket out on the car after putting it on jack stands. I am suspecting the front valve cover gasket leaking on the drivers side from what I can see from the buildup. Is this a common problem as well? It didnt pop up on the search function.

Side note, there is something else underneath the cover that says 24v dohc on the engine that is running off of the left bank via a rubber belt. I have no idea what this part is, can anyone enlighten me? Could this be the source of the leak, and it is throwing some oil on the engine and valve cover gasket? I thought it was the oil pump, but that is down in the engine oil pan, correct?

Sorry that I do not have any pictures of the oil leak or the part in question, it is dark out side. I know that troubleshooting without pictures can be difficult, but I can get some up tomorrow if they are needed. I was just trying to confirm a sneaking suspicion before I buy parts and year into the thing.

Last edited by C.E.Divine; 06-21-2012 at 09:18 PM.
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Old 06-22-2012, 07:01 AM   #2 (permalink)
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The belt under the "24V DOHC" plastic cover drives the water pump via the bank 2 exhaust cam. There is (obviously) an oil seal where the shaft comes out of the head. Never personally heard of this seal leaking, but any oil seal can leak.
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Old 06-22-2012, 12:26 PM   #3 (permalink)
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Hmm, that is kinda cool that the water pump runs off of the back side of the engine instead of the front with all the other accessories. I have never encountered that before. I'll check out that seal when I get into it further and make sure that is not the issue instead of the valve cover gasket.
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Old 06-27-2012, 08:05 PM   #4 (permalink)
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Just a quick update, I got the left valve cover gasket changed. It was a pretty simple job, but I didn't do the right valve cover gasket because it is such a pain to get to. Im not going to just leave it, but I may wait until this fall to tackle that job when it cools off significantly.

This has fixed the issue. You can see where the oil was seeping out from under the gasket on this picture, just a little to the drivers side from center on the very front of the cylinder head.



I was fairly happy to see that there was no sludge in the head. It looks to be in fairly good shape to me. I am just glad that It won't be leaking oil on the driveway anymore.

One thing that went slightly wrong was the crankcase vent tube busted as I was pulling it out. The clip on the very bottom snapped, so I had to make a temporary seal with rtv to hold it in place until i can remember to call ford and see about replacing it, or find one at the salvage yard.
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Old 07-01-2012, 10:06 PM   #5 (permalink)
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My 2004 is leaking oil, but it is not leaving a puddle anywhere. Can somebody help me?
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Old 07-01-2012, 11:06 PM   #6 (permalink)
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Goddamn your cams are clean, C.E...

I haven't even owned my car for long, but I still feel like I've got some explaining to do now...
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Old 07-02-2012, 09:28 AM   #7 (permalink)
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I think that is pretty solid proof as well that as long as you use decent motor oil and don't drive the piss out of the car, the oil change interval can now go 5-6k miles, and 3k mile oil changes are mearly obsolete. I wasn't expecting what I saw, because mom would usually go about 6k miles before I would realize that she was overdue according to the 3k interval. I expected all kinds of sludge. But she doesn't accelerate quickly or hot rod, so that helps.
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Old 07-02-2012, 06:05 PM   #8 (permalink)
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Quote:
Originally Posted by C.E.Divine View Post
I think that is pretty solid proof as well that as long as you use decent motor oil and don't drive the piss out of the car, the oil change interval can now go 5-6k miles...
Can I ask what kind of oil you are using? Do you take it to the dealer for oil changes?
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Old 07-02-2012, 11:12 PM   #9 (permalink)
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I have been using castrol gtx high mileage since I started doing the oil changes myself on my family's cars.
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Old 07-03-2012, 07:24 AM   #10 (permalink)
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Quote:
Originally Posted by doobious62 View Post
My 2004 is leaking oil, but it is not leaving a puddle anywhere. Can somebody help me?
You'll have to do a thorough search around the top and bottom of the engine. Look for wet areas.
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