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I have a 2011 Acura RDX with 385000km on it. When I remove the oil filler cap with engine running, the air blowing out the filler hole is substantial.

With engine running I unplugged the output side of the PCV and no air is coming out. Since the PCV looked original I replaced it. But STILL no air coming out of it. Why not? I tried revving engine up but no change, no air blowing out. (Good suction at intake port leading to PCV though)

This vehicle's PCV is metal and screws into the block (just above alternator). Does that mean the crankcase whole may be blocked with carbon and I should scrape it out with a screwdrive? Not sure what's wrong

TSG
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1 Answers1

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If you're seeing fumes coming out through the filler cap, this is typically called blow by and has nothing to do with PCV function. It would mean the rings are worn out and combustion gasses are going past them and into the crankcase, then out through the filler cap when it's off. Only fix is either rebuild or replace the engine. With nearly 240k miles on it, this is very likely what you're seeing.

Pᴀᴜʟsᴛᴇʀ2
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