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Diagnose my Air Filter
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This is a Fram Tough Guard air filter, and it is only three months old to the tune of MAYBE 1,000 miles......that dark black spot smells like burnt something. Not oil, to be honest, just smells like carbon maybe? WTH is going on under my hood??
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Its oil vapor from blow-by gasses coming out of the rubber tube that goes into the air box from the valve cover. If you disconnect the tube it might look like smoke/vapor but oil is in those vapors. Some people old school type build draft tubes for their engines when they get tired of replacing air filters and/or slobbering up their intakes and throttle bodies.
Your engine is showing signs of wear, excessive blow by gasses come from the crankcase when your piston rings or cylinder bores have wear. This condition multiplies with high speed/rpm and heavy load type driving. |
There are write ups on converting your valve cover line to a oil catcher... may help in your case...
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First, remove the tube that goes from the valve cover to the air box and spray some throttle body cleaner through it to make sure it isn't blocked. I got an incredible deal on my first Jeep, a YJ, because they were certain the rings were shot (air filter looked exactly like yours). Turns out it was just the PCV system was clogged up.
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Ya pcv valves are cheap and can try that first...
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Originally Posted by huntingman2706217
(Post 965027)
Ya pcv valves are cheap and can try that first...
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