Multiquip 5117110260 Exhaust Valve Seat Insert

The Multiquip 5117110260 is a genuine OEM Exhaust Valve Seat Insert designed for DCA25SSI, DCA25SSIU, DCA25SSI2, DCA25SSAI, and DCA25SSIU-GEER ultra-silent diesel generators. As a factory-sourced component, this insert meets the exact material and dimensional standards required to maintain proper combustion sealing in the cylinder head. It is the correct OEM specification part for DCA25 series generator engine rebuilds and top-end service work. DHS Equipment supplies this part direct, so you can be confident you are getting the right fit the first time.

Key Features

• Hardened Seat Material — Manufactured to OEM hardness and thermal tolerances, ensuring the exhaust valve seals correctly under sustained high-temperature combustion conditions.
• Drop-In Cylinder Head Fit — Machined to the exact press-fit diameter for DCA25 series cylinder heads, installing cleanly without reworking the head bore.
• DCA25 Series Compatibility — Confirmed fitment for DCA25SSIU, DCA25SSI, DCA25SSI2, DCA25SSAI, and DCA25SSIU-GEER ultra-silent diesel generator models.
• Combustion Integrity — A correctly seated exhaust valve seat insert maintains compression and exhaust sealing, allowing the generator engine to produce its rated output consistently across load cycles.
• Genuine OEM Sourcing — Supplied as a Multiquip genuine OEM part, ensuring the insert matches the original engineering spec for the Isuzu-powered DCA25 engine family.

The exhaust valve seat insert is a hardened ring pressed into the cylinder head that provides a precision seating surface for the exhaust valve to close against. It withstands the repeated impact and extreme heat of exhaust gas flow, protecting the softer aluminum or cast-iron head material from wear. When this insert becomes worn, pitted, or loose, the exhaust valve can no longer seal completely, leading to compression loss, rough running, increased fuel consumption, and potential engine damage if left unaddressed. Replacing the insert during a top-end rebuild restores proper valve sealing and returns the engine to full operating efficiency.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.