Multiquip 8973186530 Thermostat Housing DCA-45USJ 4JG1

The Multiquip 8973186530 is a genuine OEM Thermostat Housing DCA-45USJ 4JG1 designed for the DCA-45USJ ultra-silent diesel generator. Sourced directly from Multiquip, this is the exact housing unit specified for the Isuzu 4JG1 engine fitted to the DCA-45USJ, ensuring a correct, no-compromise fit. If your generator is running hot, cycling erratically, or showing signs of cooling system trouble, the thermostat housing is a critical component to inspect and replace with the proper OEM part.

Key Features

• OEM-Grade Cooling System Integrity — Manufactured to the same specifications as the original, maintaining proper coolant flow and temperature regulation within the Isuzu 4JG1 engine.
• Direct-Fit Replacement — Engineered to match the original mounting configuration on the DCA-45USJ, allowing straightforward installation against the engine's coolant passages and thermostat seat.
• DCA-45USJ Specific — Confirmed fitment for the DCA-45USJ ultra-silent generator series; use part number 8973186530 to verify compatibility before ordering.
• Protects Engine from Thermal Damage — A correctly sealed thermostat housing keeps coolant where it belongs, preventing overheating conditions that can cause head gasket failure or engine shutdown under load.
• Genuine Multiquip OEM Part — Backed by Multiquip's OEM supply chain, so you receive the same component installed at the factory — not a generic substitute.

The thermostat housing on the Isuzu 4JG1 engine is the structural mounting point for the thermostat itself, sealing the junction between the thermostat and the engine's cooling passages. It directs coolant through either the radiator circuit or the bypass circuit depending on engine temperature, allowing the engine to reach and hold its optimal operating temperature. When the housing cracks, warps, or develops a failed sealing surface, coolant can leak externally or the thermostat can lose its seat — leading to overheating, inefficient fuel burn, and potential engine damage in a working generator.

For questions about fitment or to confirm this is the correct part for your DCA-45USJ, contact the DHS Equipment parts team for assistance.

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.