Parts for your 2017 Honda Accord-Head gasket

2017 Honda Accord head gasket — what it does and when to replace it

Yes, the 2017 Honda Accord does use a head gasket. Technical sources including Honda’s Factory Service Manual (engine disassembly/reassembly sections) and Honda’s electronic parts catalogue list a multi‑layer steel (MLS) cylinder head gasket for all 2017 Accord engines — the 2.4‑litre i‑VTEC four‑cylinder, the 3.5‑litre i‑VTEC V6, and the 2.0‑litre Atkinson‑cycle four‑cylinder in the Hybrid. The service procedures specify head‑bolt torque/angle sequences and surface flatness checks, which only apply when a head gasket is fitted.

For this Accord, the head gasket sits between the cylinder head and engine block, sealing the combustion chambers while keeping coolant and oil in their own passages. That seal has to cope with high temperatures, pressure spikes and constant expansion and contraction. The MLS design Honda uses suits aluminium heads and blocks, giving reliable clamping when installed with the correct torque‑angle routine and clean, flat mating faces.

It’s not a scheduled service item, but smart servicing helps the head gasket live a long life. Sticking to the correct Honda‑approved coolant mix, replacing coolant at the recommended interval, and keeping the cooling system in good nick (radiator, thermostat, fans) all reduce thermal stress. Overheating is the number‑one gasket killer, so any cooling issue should be sorted pronto.

If replacement is on the cards, the job is detailed and best handled by a competent technician. Expect the head to be checked for warpage and resurfaced if out of spec. New head bolts are typically required (they’re torque‑to‑yield), and it’s wise to renew intake/exhaust gaskets, valve cover gasket, and consider the water pump and timing components while access is open. Correct cleaning (no gouging), following the bolt sequence, and a careful coolant bleed are crucial. An oil and filter change afterwards is a good move to clear any contamination.

Owners can watch for tell‑tales of trouble:

• Unexplained coolant loss, pressure in the overflow bottle, or sweet‑smelling white exhaust on warm‑up
• Overheating, poor heater performance, or fluctuating temperature gauge
• Milky residue on the oil cap or dipstick, or rough cold starts

Catch issues early and the 2017 Accord’s head gasket will usually give long, drama‑free service across Aussie and Kiwi conditions.

Popular questions about 2017 Honda Accord head gaskets

What are the common symptoms of a failing head gasket on a 2017 Accord?
Typical signs include persistent coolant loss with no visible leaks, overheating under load, white steam from the exhaust after warm‑up, bubbles in the overflow bottle, oily residue in coolant, or milky discolouration on the oil cap. A compression or leak‑down test and a chemical block test can confirm mixing of gases and coolant.

Can a head gasket sealer fix the issue?
Sealants are a short‑term patch at best and can clog small cooling passages. On a modern Honda with an MLS gasket, the proper repair is to address the root cause (often overheating), inspect and machine the head if needed, and fit a new OEM‑spec gasket with new head bolts.

How much does replacement typically cost in Australia or New Zealand?
Costs vary with engine (I4 vs V6 vs Hybrid), machine work, and parts chosen. As a ballpark, labour and parts can range from mid to high four figures AUD/NZD. A detailed quote should include machining, new bolts, gasket set, fluids, and any related cooling or timing components recommended while the engine is apart.