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So what is pic one of
The 1st pic in my post is a Milwaukee bore scope looking at one crusty intake port and valve. EGR and oil mist create deposits you don't want on your ports and valves. Adding a catch can removes the oil mist, which should reduce this buildup greatly.
 

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Discussion Starter #22
8727


Im guessing I pulled 4-6 oz. or so out of the can this time. Hadn't checked it in 7,500 miles though which is the longest interval I’ve gone between checking.
 
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