Honda D17A Exhaust Manifold Gasket 18115-PLC-J01

Honda D17A Exhaust Manifold Gasket - Genuine OEM (18115-PLC-J01)

Hearing a ticking or puttering sound from the front of your Civic that gets louder when you give it gas? Nine times out of ten on a D17A, that's a leaking exhaust manifold gasket, and this is the part that shuts it up. Honda 18115-PLC-J01 is the genuine gasket that seals your exhaust manifold to the head, and it's a multi-layer steel design, so it's built to take the brutal heat that lives right there. If you're pulling the manifold for a leak, a header swap, or anything else back there, don't put it back together without a fresh one of these.

Why A Leaking Exhaust Gasket Won't Fix Itself

This gasket lives between your exhaust manifold and the head, sealing in exhaust gas right where it comes screaming out of the engine at full temperature. When it goes, that seal opens up and exhaust starts escaping before it ever reaches the pipe. You'll hear it as a tick or a ticking that grows with the revs, and it only gets worse the longer you leave it. Beyond the annoying noise, a leak here can throw off your oxygen sensor readings and mess with how the car runs, and the constant blow-by can warp or eat away at the surfaces over time. It's not a leak that heals, it just gets louder and more expensive, so it's worth sealing up right when you catch it.

MLS, Because Of Where It Lives

Here's why the multi-layer steel construction matters on this one. The exhaust side is the hottest real estate on the whole engine, and the manifold expands and contracts hard every time the engine heats up and cools down. MLS handles that, the steel layers flex with the heat cycling and keep their seal instead of cracking or burning out the way a lesser gasket would. This is the same gasket Honda built the car with, so it fits the ports and the bolt pattern exactly and seals the way it's supposed to. When you torque it down on a clean surface, it stays put through years of heat.

Do It Right While You're Back There

Couple of things worth knowing before you wrench on this. Those exhaust manifold nuts have been cooking for twenty-plus years, so they fight you, hit them with penetrating oil ahead of time and take it slow so you don't snap a stud, because a broken exhaust stud turns an easy job into a miserable one fast. While you've got it apart, eyeball the manifold itself for cracks and check the studs and nuts, and replace any that look rough. Then clean both sealing surfaces down to bare metal, set the new gasket in, and torque everything down even. Do it that way and you're done with that tick for good.

What You Get

• Genuine Honda exhaust manifold gasket (18115-PLC-J01) for the D17A
• Multi-layer steel (MLS) construction for high-heat durability
• Seals the exhaust manifold to the cylinder head
• Direct OEM replacement, correct port and bolt-hole fit
• Sold individually

Fits These Cars

• 2001-2005 Honda Civic DX/EX/LX (D17A1/D17A2)
• 2001-2005 Honda Civic GX (D17A6)
• 2001-2005 Honda Civic HX (D17A7)

Note: Genuine Honda exhaust manifold gasket, part number 18115-PLC-J01, for the D17A1, D17A2, D17A6, and D17A7 engines. Multi-layer steel (MLS) construction built to withstand the heat and thermal cycling at the exhaust manifold. Seals the exhaust manifold to the cylinder head. A leaking exhaust manifold gasket causes a ticking exhaust noise that worsens over time and can affect sensor readings and engine performance. Recommended for replacement any time the exhaust manifold is removed. Install on clean surfaces with the manifold torqued down evenly. Sold individually. Fits the 2001-2005 Honda Civic DX/EX/GX/HX/LX. One gasket per order.