Parts for your 2007 Honda Stream-Manifold gasket

2007 Honda Stream manifold gasket: purpose, care, and when to replace

Yes, the 2007 Honda Stream uses manifold gaskets. Technical references including the Honda Stream Service Manual (RN6–RN9, 2006–2012), the Honda Electronic Parts Catalogue for RN6/RN8, and Honda R18A/R20A engine workshop data show both intake manifold and exhaust manifold gaskets are fitted as standard sealing components.

The manifold gasket’s job is simple but crucial. On the intake side it seals the intake manifold to the cylinder head so the engine only breathes metered air, helping maintain proper idle, smooth running, and spot-on fuel trims. On some variants the intake manifold also carries coolant passages, so a sound gasket prevents leaks there too. On the exhaust side, a multi-layer steel gasket seals hot gases at the head, protecting the oxygen sensors and catalytic converter from false readings and stopping fumes and noise sneaking into the cabin bay.

While there’s no fixed service interval, manifold gaskets are consumables that can harden or lose tension after years of heat cycles. They should be replaced any time the manifold is removed, or if there are signs of leaks. Common symptoms include:

• Hissing (intake) or ticking (exhaust) noise on cold start
• Rough idle, high idle, or lean codes like P0171
• Soot marks around exhaust flange, exhaust smell in the bay
• Increased fuel use or sluggish response

Good practice on a 2007 Honda Stream is to use genuine or high-quality equivalent gaskets, clean the mating faces thoroughly, and follow the factory torque sequence (centre-out, in stages). Avoid sealants unless the Honda manual specifically calls for them—most intake gaskets on these engines are moulded rubber designs that seal dry, and exhaust gaskets are metal layered crush types. If the car runs the R18A with the exhaust manifold integrated to the catalytic converter, also check the spring bolts and the donut gasket at the front pipe, as leaks there can mimic a manifold gasket fault.

During a service, a quick visual and an ear on first start of the day can catch early issues. Scan fuel trims and look for any faint soot trails. If there’s a confirmed leak, don’t put it off—exhaust leaks can skew sensor data and risk catalyst damage, and intake leaks can lead to lean running and drivability grief.

• Does a 2007 Honda Stream have intake and exhaust manifold gaskets?

It does. The Honda service literature and parts catalogue list distinct gaskets for the intake manifold-to-head, plus a metal multi-layer exhaust manifold-to-head gasket. These are standard wear-and-tear parts that should be renewed whenever the manifolds are removed or if a leak is suspected.

• Can they drive with a leaking manifold gasket on a 2007 Honda Stream?

It’s not a great idea. An intake leak can cause a lean mixture, rough running, and extra heat, while an exhaust leak can upset oxygen sensor readings, reduce performance, and in some cases allow fumes into the cabin. Sorting it promptly protects the catalytic converter and keeps fuel economy in check.

• What’s the right way to fit a new manifold gasket on this model?

Clean both mating faces, position the new gasket correctly, then torque the fasteners in the factory sequence and stages. Don’t add sealant unless the Honda procedure specifies it. If hardware is corroded, replace it, and check adjacent seals like throttle body and front pipe donut while you’re there.