Parts for your 2020 Honda Odyssey-Head gasket

2020 Honda Odyssey head gasket: purpose, care, and when to replace

Yes, the 2020 Honda Odyssey uses a cylinder head gasket. Technical sources that confirm this include Honda Service Information for the 2018–2020 Odyssey J35 V6 (sections covering Cylinder Head—Removal/Installation, which specify replacing the head gasket and head bolts), Honda Genuine Parts catalogues listing “Gasket, Cylinder Head” for the 3.5‑litre V6, and independent workshop databases such as ALLDATA/Mitchell1 that publish the head gasket torque sequence and specs for this engine. That makes the head gasket very much relevant to this model.

On the 3.5‑litre V6, the head gasket sits between the alloy cylinder head and the engine block, sealing combustion pressure while keeping coolant and oil in their own circuits. It’s a multi‑layer steel (MLS) design built to handle heat cycles, pressure, and daily family‑hauling duties. When it’s healthy, the engine runs smoothly, stays cool, and uses fluids as it should.

A head gasket isn’t a scheduled service item, but it benefits from good habits. Keeping the cooling system in top nick—using Honda‑approved coolant, replacing it at the intervals in the owner’s manual, and ensuring the radiator fans, thermostat, and cap are all working—helps protect the gasket. Avoiding overheating is the big one