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Old 12-24-2008, 09:09 AM   #1
doogee
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Yellow Under Oil Cap

Was checking and topping off my oil this morning when I noticed the bottom of the oil cap had yellow gunk on it.

Looks like mustard. Did some reading and a lot of people suggest a blown head gasket.

But, couldn't it just be condensation? It never did this in the summer or fall. Suddenly it happens in the winter.

Checked the dip stick and its fine.
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Old 12-24-2008, 09:46 AM   #2
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Old 12-24-2008, 10:04 AM   #3
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Yellow on the valve-train is a sign of coolant in the oil. I assume it is the same for the oil cap. Typically a leaking head gasket...
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Old 12-24-2008, 04:52 PM   #4
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Its most likely an accumulation of moisture in the oil if you tend to do short trips. This in not allowing engine to reach operating temps and the moisture in the oil cannot evaporate and get out through the pcv. With time, moisture accumulates and when there's enough of it in there, oil can turn to sludge. You can change your driving habits or change your oil more often to remedy to this. This problem tends to only appear in the winter time.

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Old 12-24-2008, 07:31 PM   #5
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Quote:
Originally Posted by morpheus View Post
Its most likely an accumulation of moisture in the oil if you tend to do short trips. This in not allowing engine to reach operating temps and the moisture in the oil cannot evaporate and get out through the pcv. With time, moisture accumulates and when there's enough of it in there, oil can turn to sludge. You can change your driving habits or change your oil more often to remedy to this. This problem tends to only appear in the winter time.
This is what I've been figuring. I know I have a little gunk in my coolant but I'm also sure its just from WaterWetter. It tends to do that. I think if it were a headgasket I'd know for sure.

But I took it for a huuuge drive today. Went through half a tank on the highway. So I'll check it out tomorrow and I bet it's all cleared up.

I better stop the short journeys.
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Old 12-24-2008, 10:42 PM   #6
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morpheus is bang on! dodges have this all the time especially due to the oil fillers being external alot of the time...purely condensation noticed more with short drives
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