Multiquip 9117118030 Exhaust Valve Seat

The Multiquip 9117118030 Exhaust Valve Seat is a genuine OEM component designed for the DCA40SSAI and DCA40SSI ultra-silent diesel generators. Sourced directly from Multiquip, this part meets the exact material and dimensional specifications of the original, ensuring a correct fit within the cylinder head. Confirmed fitment for DCA40SSAI and DCA40SSI models makes this the straightforward choice when servicing these generator engines.

Key Features

• Genuine OEM Material Grade — Manufactured to the precise hardness and alloy specification required for exhaust-side seating, where heat and combustion pressure demands are highest.
• Direct Cylinder Head Fitment — Engineered to the exact seat diameter and press-fit tolerance of the original, seating correctly into the cylinder head without rework or machining adjustments.
• Confirmed Compatibility — Verified fitment for DCA40SSAI and DCA40SSI ultra-silent diesel generator models.
• Combustion Seal Integrity — A correctly seated exhaust valve seat maintains a gas-tight seal at the valve face, preserving compression and combustion efficiency across the generator's power output range.
• Fuel System Safety Compliance — Proper exhaust valve seating is critical to preventing hot gas blowby, which can cause valve burning, overheating, and uncontrolled engine damage in high-cycle generator applications.

The exhaust valve seat is a hardened ring pressed into the cylinder head that provides the sealing surface against which the exhaust valve closes after each combustion cycle. It absorbs the repeated impact of the valve face and transfers heat away from the valve into the surrounding cylinder head material. When a valve seat becomes worn, pitted, or cracked, the exhaust valve can no longer seal completely, leading to compression loss, rough running, increased fuel consumption, and eventual valve or engine failure.

For fitment questions or to confirm compatibility before ordering, contact the DHS Equipment team directly.

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.