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What is this "gunk" on my oil pan?

3K views 13 replies 6 participants last post by  GregRob 
#1 ·
2013 Tiguan. I removed my skid plate to change my oil yesterday and saw this gunk running down the pan. It was mostly dried so I couldn't really tell what it was, and it was brittle so i could break little chunks off. I'm no mechanic at all so I have no clue what is happening. From the pics in this link http://imgur.com/gallery/gp0BGvL can anyone tell me what this might be? Thanks.
 
#7 ·
2013 Tiguan. I removed my skid plate to change my oil yesterday and saw this gunk running down the pan. It was mostly dried so I couldn't really tell what it was, and it was brittle so i could break little chunks off. I'm no mechanic at all so I have no clue what is happening. From the pics in this link http://imgur.com/gallery/gp0BGvL can anyone tell me what this might be? Thanks.
Remove you oil cap and take a look at what is under it. Any coolant level issues? Tested the PCV for function?
 
#12 ·
Ok. No build up of anything under the cap. Looks perfect. Just read that a failing pcv can cause a whistle. I've been hearing a whistle when accelerating over 30 miles per hour. At first I thought it was a distant siren but realized it was the car. It dies down and stops when I stop accelerating. I'll check the pcv valve tomorrow morning when I can see what I'm doing.
 
#14 ·
A malfunctioning PCV valve can cause oil blowing out of the seals. Over-pressureizing the crankcase.
In the old days, they use to just vent the crankcase to the atmosphere which was a major cause of smog. That was the first thing they fixed when they started doing pollution controls.
 
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