Parts for your 2007 Honda Stream-Exhaust gasket

2007 Honda Stream exhaust gasket: what it does and when to replace

Based on Honda technical literature for the RN6–RN9 series (2007 Honda Stream) and Honda Electronic Parts Catalogue diagrams for the exhaust system, this model does use exhaust gaskets. These include a cylinder head–to–exhaust manifold gasket, and a spring-joint “donut” gasket between the manifold/catalyst outlet and the front pipe, plus flange gaskets further downstream depending on variant. That means an exhaust-gasket is very much relevant to a 2007 Honda Stream.

On the 2007 Stream, the exhaust gasket’s job is to seal hot gases as they exit the engine and travel through the catalytic converter and pipes. The head-to-manifold gasket is a metal or multi-layer steel piece designed to handle extreme heat and pressure. The spring-joint donut sits between tapered flanges and flexes slightly with engine movement, keeping the joint sealed without needing big torque on the fasteners. Together they prevent leaks, protect the catalyst’s efficiency, and keep the cabin free of fumes.

Typical signs a Stream’s exhaust gasket is on the way out include a ticking or raspy note at cold start that softens as it warms up, whiffs of exhaust odour near the engine bay or under the car, black sooty traces around a joint, and sometimes a loss of low‑down torque. If a leak is upstream of the oxygen sensors, the ECU can be fooled, which may show up as poor fuel economy or a warning light.

Best practice on these cars is to replace any disturbed exhaust gasket whenever the joint is undone—donuts and manifold gaskets are single‑use. On coastal Aussie and Kiwi cars, corrosion around the spring bolts and flanges is common, so plan on new spring bolts and nuts along with the gasket. Clean the mating faces, align the joint squarely, and torque fasteners to the service manual spec with the engine cold. Don’t smear RTV or paste on the head-to-manifold or donut joints