Parts for your 2009 Honda Stream-Exhaust gasket

2009 Honda Stream exhaust gasket: what it does and when to replace it

Based on Honda’s technical references for the Stream RN6–RN9 series (2006–2014) — specifically the Honda Stream Service Manual section covering the Exhaust System and the Honda Electronic Parts Catalogue for RN6/RN8 chassis — the 2009 Honda Stream does use multiple exhaust gaskets. These include a multi-layer steel gasket at the cylinder head to exhaust manifold/catalyst, a compressible “donut” gasket at the front pipe, and flat/graphite-type gaskets at mid-pipe and rear muffler flanges. So yes, an exhaust gasket is absolutely relevant to this model.

On a 2009 Honda Stream, the exhaust gaskets are small but vital. They seal the joins between the manifold, front pipe, catalytic converter, centre pipe and muffler, keeping the system gas-tight so the engine runs sweet and the cabin stays fume-free. Proper sealing helps the oxygen sensors read accurately, which means better fuel economy, lower emissions and no annoying check engine light for lean/rich running. It also keeps the note civil — no chuffing or ticking on cold start — and maintains the right backpressure so the R18A/R20A engine performs as it should.

They’re not a scheduled service item, but they are smart preventative maintenance whenever any part of the exhaust is removed. Most techs will replace disturbed gaskets as a matter of course. For day-to-day servicing, it’s worth a quick look under the car every 10,000–20,000 km: check for soot tracks at joints, loose spring-bolts on the front pipe, and any signs of impact damage that could distort a flange.

• Common signs a Stream needs an exhaust gasket: ticking or hissing that quietens as it warms up, exhaust odour near the front of the car, black soot around a joint, louder note, or a failed WOF/reg inspection for an exhaust leak.
• Best practice on replacement: clean mating faces, use new hardware where Honda specifies spring-bolts, and fit an OE-quality gasket. Tighten evenly from the centre out, then recheck for leaks after a heat cycle.
• Tips for Aussie and Kiwi conditions: coastal air and short trips can hasten corrosion. If the car sees gravel roads or speed humps, keep an eye on the front pipe donut gasket and flex joint.

Avoid smearing sealant upstream of the catalytic converter — it can contaminate O2 sensors. If a joint’s been apart or there’s any doubt, a fresh gasket is cheap insurance for a quiet, legal and healthy Stream.

Popular questions about 2009 Honda Stream exhaust gaskets

Does a 2009 Honda Stream have more than one exhaust gasket?
Yes. It typically has a manifold-to-head gasket, a front pipe “donut” gasket, and one or more flange gaskets further back. The exact count depends on trim and exhaust configuration, but multiple sealing points are normal on RN6–RN9 Streams.

How long do exhaust gaskets last on a Stream?
Many last the life of the car, but after 10–15 years heat cycles, corrosion and impacts can take a toll. They’re usually replaced when there’s a leak or any time an exhaust joint is disturbed during other repairs.

Is it ok to drive with a leaking exhaust gasket?
Not ideal. Apart from the noise, hot gases and fumes can enter the cabin, and oxygen sensor readings can go off, hurting fuel economy and emissions. It can also lead to a failed WOF/reg inspection. Best to sort it promptly.