Distributor Shaft O-Ring Honda 30110-PA1-732

Genuine Honda distributor shaft O-ring, part number 30110-PA1-732. This seal sits on the distributor shaft where it enters the cylinder head and prevents oil leaks around the distributor base. It is one of two different shaft O-ring types used by Honda, depending on engine version and production year. Because both variants look nearly identical from the outside, fitment can only be confirmed using the vehicle’s VIN.

Application and fitment

The O-ring measures 26.4 × 3.1 mm and is used in selected Honda engines equipped with a traditional distributor (ignition rotor). Honda used two different distributor shaft O-rings across various years and engine versions. Since these variants cannot be reliably distinguished visually, VIN verification is required to confirm correct fitment.

Description and key features

The O-ring is made of oil-resistant, heat-resistant rubber designed to maintain proper sealing where the distributor shaft enters the cylinder head. A worn or hardened O-ring is a common cause of small but persistent oil leaks on older Honda engines. Replacing it is a quick and effective way to restore full sealing and prevent contamination inside the distributor housing.

• exact OEM dimensions: 26.4 × 3.1 mm,
• oil- and temperature-resistant rubber construction,
• restores proper sealing of the distributor shaft entry point,
• fixes a common oil leak issue on older Honda engines,
• genuine OEM part supplied by Honda in bulk packaging.

Honda sells this O-ring in bulk packs of 10 pieces. For this reason, individual units are shipped without retail packaging, but they are 100% genuine OEM parts.

Why replace the distributor shaft O-ring?

Over time, the rubber O-ring hardens, shrinks, and loses elasticity. Even a small loss of sealing at the distributor base results in oil seepage that may be mistaken for a leaking cam seal or timing cover gasket. Typical symptoms include oil traces around the distributor, oil running down the engine block, and a noticeable oil smell once the engine warms up. Replacing the O-ring restores proper sealing and prevents further leakage.

FAQ – distributor shaft O-ring Honda 30110-PA1-732

How can I confirm whether this O-ring fits my engine?
Honda used two different distributor shaft O-rings depending on engine version and production year. Because the distributors look almost identical externally, the only reliable way to confirm compatibility is by checking the vehicle’s VIN. We verify fitment based on VIN.

What are the symptoms of a worn shaft O-ring?
Oil leakage where the distributor enters the cylinder head, an oily distributor base, oil running down the head or block, and an oil smell after the engine warms up.

Do I need special tools to install it?
No. Replacement involves removing the distributor, cleaning the mounting surface, and installing the new O-ring. It is recommended to mark the distributor’s position before removal to maintain correct ignition timing.

Is this a genuine part?
Yes. This is a genuine Honda OEM O-ring. Because Honda supplies them in bulk packs of 10, single units are shipped without retail packaging.