Honda K Series/S2000 Water Passage Outlet Seal 19322-PCX-003

Honda K Series/S2000 Water Passage Outlet Gasket - 19322-PCX-003

Doing a water pump replacement on your K series or S2000 and you're seeing this O-ring on the parts diagram? Part number 19322-PCX-003. This is the OEM O-ring that seals the back of your water passage - that's the cast aluminum housing on the front of your engine where the water pump bolts to. The O-ring sits in a groove on the back of the water passage where it presses against the engine block. When this O-ring gets old and hard from years of heat cycling, you're getting coolant seeping out from behind the water passage. It's not a big dramatic leak usually - just weeping that shows up as crusty dried coolant around the water passage area. Fresh O-ring stops the seepage.

You Only Need This If You're Pulling the Water Passage Off

Here's the thing - you don't replace this O-ring during normal water pump jobs. The water pump bolts to the front of the water passage. When you're swapping a water pump, you're unbolting the pump from the water passage, not pulling the water passage off the block. This O-ring's behind the water passage where it mounts to the block. You only disturb it if you're completely removing the water passage from the engine - like if you're doing major engine work, pulling the head, or replacing the water passage itself because it's cracked or corroded. Most people never touch this O-ring. But if you're pulling the water passage off the block for any reason, you need to replace it.

Don't Reuse It If You Pull the Water Passage

If you're removing the water passage from the block, don't even think about reusing this O-ring. It's been compressed in that groove for 100k+ miles getting cooked by engine heat every single day. The rubber's hard and it's taken a permanent set to the shape of the groove. When you pull the water passage off, that old O-ring's done. Trying to reuse it's how you end up with coolant weeping from the front of your engine after you've buttoned everything up. The O-ring's cheap - like two bucks. Just replace it and move on with your life.

K Series and F Series Both Use This Same O-Ring

This O-ring fits both K series engines (all the K20s and K24s) and S2000 F series engines (F20C and F22C). Honda used the same water passage design on the front of these engines. Whether you're wrenching on your Civic Si, your RSX, your S2000, or your Accord, if it's got a K or F series motor, this is the right O-ring.

What You Get

• Honda OEM water passage outlet O-ring (part number 19322-PCX-003)
• Seals back of water passage to front of engine block
• Prevents coolant seepage at water passage mounting area
• Rubber O-ring construction
• Same O-ring your engine came with from the factory

Fits Your Car

• 2013-2015 Acura ILX
• 2007-2012 Acura RDX
• 2002-2006 Acura RSX
• 2004-2014 Acura TSX
• 2003-2012 Honda Accord
• 2002-2015 Honda Civic Si
• 2002-2014 Honda CR-V
• 2012-2015 Honda Crosstour
• 2003-2011 Honda Element
• 2000-2009 Honda S2000

Compatible Engines

• K20A2, K20A3
• K20Z1, K20Z3
• K23A1
• K24A1, K24A2, K24A4, K24A8
• K24Z1, K24Z2, K24Z3, K24Z6, K24Z7
• F20C, F22C