Honda K20A/K20Z/K24A/S2000 Spark Plug Tube Seal 12342-PCX-004

Honda K20A/K20Z/K24A/S2000 Spark Plug Tube Seal - 12342-PCX-004

Your spark plugs are sitting in a puddle of oil and you're getting misfires because the oil's fouling the plugs? Part number 12342-PCX-004. This is the OEM rubber seal that sits at the top of each spark plug tube where the valve cover meets the tube. The seal keeps oil from leaking down the spark plug tube and getting on your spark plugs. When the seal fails, oil seeps past it and drips down the tube onto your spark plug. The plug gets coated in oil, it misfires, and you're getting a check engine light. Fresh seal stops the oil from getting to the plug and your misfires go away.

Here's Why These Seals Always Fail

The spark plug tube seals sit at the top of the spark plug tubes where the valve cover seals to them. They're rubber and they're living in a 200+ degree environment with oil constantly around them. Over time the rubber gets hard and brittle. It shrinks a bit and stops sealing. Oil starts seeping past the seal and dripping down the tube onto your spark plug. You'll pull a plug and it's covered in oil. That's a failed tube seal. These seals usually fail around 100k miles but they can go earlier if your engine runs hot or if you're hard on it. Once one seal fails, the others aren't far behind. If you've got oil on one plug, check the others. You're probably replacing multiple seals.

Sold Individually So You Only Replace What's Bad

These seals are sold individually. Most engines have four spark plugs, so four tube seals. If only one or two seals are leaking, you can replace just those ones. You don't have to buy a whole set if you don't need it. That said, if one seal's failed and your engine's got 100k+ miles on it, the other seals are probably close to failing too. It's your call whether you want to replace just the bad ones now and come back later for the rest, or replace all of them while you're in there and be done with it. Doing them all at once saves you from pulling the valve cover multiple times.

You're Pulling the Valve Cover to Replace These

The spark plug tube seals sit at the top of the tubes where they meet the valve cover. You can't get to them without pulling the valve cover off. Valve cover off, pull the old seals out, press the new seals into the valve cover, reinstall the cover with a fresh valve cover gasket. It's not a hard job but it takes a few hours. If you're already doing valve cover gasket work or you're swapping cams or doing any head work, replace these seals while you're in there. They're cheap and you're already in the valve cover anyway. Don't wait for them to fail and have to go back in later.

What You Get

• Honda OEM spark plug tube seal (part number 12342-PCX-004)
• Rubber seal for spark plug tube
• Prevents oil from leaking onto spark plugs
• Sits at top of spark plug tube where valve cover meets tube
• Sold individually (order quantity needed for your engine)
• Same seal your engine came with from the factory

Fits Your Car

• 2007-2012 Acura RDX
• 2002-2006 Acura RSX Base/Type S
• 2004-2008 Acura TSX
• 2003-2007 Honda Accord
• 2002-2011 Honda Civic Si
• 2002-2009 Honda CR-V
• 2003-2011 Honda Element
• 2000-2009 Honda S2000

Compatible Engines

• K20A2 (2002-2004 RSX Type S, K swaps)
• K20A3 (2002-2006 RSX Base, 2002-2005 Civic Si EP3)
• K20Z1 (2005-2006 RSX Type S)
• K20Z3 (2006-2011 Civic Si)
• K23A1 (2007-2012 RDX turbo)
• K24A2 (2004-2008 TSX)
• K24A4 (2003-2007 Accord, 2003-2006 Element)
• K24A8 (2007-2011 Element, 2007-2009 CR-V)
• F20C (2000-2003 S2000)
• F22C (2004-2009 S2000)

Note: Sold individually - most K series and S2000 engines use four seals. You need to pull the valve cover to replace these, which means you need a new valve cover gasket too. The seals press into grommets at the top of the spark plug tubes in the valve cover. Pry the old ones out carefully and press the new ones in. Make sure they're seated properly. After installation, pull your spark plugs to verify they're clean and dry.