Parts for your 2016 Honda Odyssey-Head gasket

2016 Honda Odyssey head gasket — what it does and when to sort it

The 2016 Honda Odyssey absolutely uses head gaskets. In fact, because it runs a 3.5‑litre V6 (J35 series), it has two cylinder head gaskets — one per bank. This is documented in Honda’s 2014–2017 Odyssey Service Manual (Engine, Cylinder Head section) and in the Honda Electronic Parts Catalogue, which lists “Gasket, Cylinder Head (R/L)” for the J35Y engine. Major gasket manufacturers’ catalogues also list MLS (multi‑layer steel) head gaskets specifically for the 2016 Odyssey, confirming fitment.

On this Odyssey, the head gasket’s main job is to seal the high‑pressure combustion chambers while keeping engine oil and coolant in their own passages. That airtight, fluid‑tight seal maintains compression for smooth power, prevents coolant or oil from sneaking into the cylinders, and stops combustion gases from bubbling into the cooling system. Modern MLS construction copes well with heat cycles and the alloy head/iron block expansion rates.

A head gasket isn’t a routine service item — it’s replace‑on‑failure. Telltale signs include unexplained coolant loss, overheating, a cold‑start misfire, white exhaust steam with a sweet smell, milky residue on the oil cap, or cooling hoses going rock‑hard quickly after start‑up. Any of these on a 2016 Odyssey warrants a cooling‑system pressure test, chemical block test, and proper diagnosis before more damage occurs.

Prevention is mostly about keeping the cooling system and lubrication spot‑on. Use the correct Honda Type 2 coolant and engine oil grade specified for the climate, and stick to the service schedule. Ensure the radiator, fans and thermostat are healthy, and bleed air after coolant work — overheating is the big gasket killer. If the van tows or works hard in summer, consider more frequent checks of coolant condition and level.

If replacement is needed, it’s a substantial job on the V6. The timing belt comes off, both cylinder heads are removed, and the mating surfaces are cleaned and checked for flatness