Parts for your 2009 Honda Odyssey-Exhaust gasket

2009 Honda Odyssey exhaust gasket

Based on Honda’s own technical literature and parts data, the 2009 Honda Odyssey absolutely uses exhaust gaskets. The Honda Odyssey 2005–2010 Service Manual (Helm Inc.) specifies replace-once gaskets at manifold-to-head and pipe-to-flange joints during removal/refit, and Honda’s Electronic Parts Catalogue for the 2009 model lists “Gasket, Exhaust Manifold” and “Gasket, Exhaust Pipe (Ring)” for both banks of the J35 V6. Major repair databases used in workshops across ANZ (e.g., ALLDATA and Mitchell) echo these requirements, noting new gaskets whenever those joints are disturbed.

On the 2009 Odyssey, the exhaust gasket’s whole job is simple: keep hot gases sealed in the system from the cylinder heads, through the manifold-catalyst assemblies, and out past the front pipe. By sealing those flanges, it prevents noisy leaks, protects the cabin from fumes, keeps oxygen sensor readings honest for good fuel economy, and helps maintain the right backpressure so the V6 runs sweet as.

These gaskets are generally multi-layer steel (MLS) at the manifold-to-head, and crush-style metal/graphite ring “donuts” at the pipe joints. They live a hard life—big heat cycles, vibration, and a bit of road grime—so once compressed, they’re not meant to be reused.

For servicing, it’s not a scheduled replacement item, but it’s smart to inspect whenever the exhaust is off for other work, or if any of the following pop up:

• Ticky/putt-putt sound on cold start that quietens warm
• Sooty marks around flange joints, exhaust smell near the firewall or underfloor
• Stronger exhaust note, whistling under load, or fuel trims out of whack

Best practice for replacement on this model:

• Always fit new OEM-quality gaskets and any spring-bolts as specified by Honda.
• Clean mating faces lightly