Parts for your 2001 Honda Stream-Exhaust gasket

2001 Honda Stream exhaust gasket — what it is and how to look after it

Technical references confirm the 2001 Honda Stream does use exhaust gaskets. The Honda Stream (RN1–RN5, 2000–2005) Service Manual details gaskets at the exhaust manifold-to-cylinder head and at the A‑pipe/front pipe joints, and the Honda EPC/parts catalogue lists distinct gasket part numbers for these interfaces. Typical Honda part references for this era and platform include: exhaust manifold gasket (e.g., 18115‑P2A‑003 for D‑series or 18115‑PNA/PND‑003 for K‑series) and the front pipe “donut” gasket (e.g., 18229‑S04‑000), with additional flat/flange gaskets used further down the system. Exact numbers vary by engine (D17A vs K20A) and market, but the presence of exhaust gaskets on the 2001 Stream is unequivocal per Honda service and parts documentation.

On this model, the exhaust gasket’s job is simple but crucial: seal hot gases at the joints so nothing leaks before the catalytic converter and muffler do their work. At the head, a multi‑layer steel manifold gasket copes with big heat cycles and keeps the engine bay free of fumes. Further down, a graphite‑lined ring (“donut”) and flat flange gaskets let the system flex without blowing out under pressure. When these seals age or are refitted poorly, they can tick on cold start, leave sooty marks around flanges, and trigger that sharp exhaust smell that no‑one wants under the bonnet or through the cabin vents.

As part of regular servicing on a 2001 Honda Stream, it’s smart to inspect these joints whenever the car’s on a hoist. Any time the manifold or front pipe comes off—say, for O2 sensor, cat, or muffler work—treat gaskets as single‑use items. Use OE‑quality parts, clean the mating faces, and torque fasteners to the workshop spec to avoid warping or crushing the seal. Spring‑bolt sets on the donut joint should move freely