Multiquip 3945603 Thermostat Gasket

The Multiquip 3945603 Thermostat Gasket is a genuine OEM component designed for DCA300SSC, DCA300SSCU, and MQP240 diesel-powered generator models. As a direct factory replacement, it ensures a proper seal at the thermostat housing, maintaining correct coolant flow and engine operating temperature. Sourced directly from Multiquip, the part is the exact part specified for these generator families, giving you confidence that it will seat and seal correctly on installation.

Key Features

• OEM-Grade Sealing Material — Manufactured to Multiquip's original material specification, delivering the compression rating and heat resistance required at the thermostat housing junction.
• Direct Housing Match — Profiles and bolt-hole pattern match the thermostat housing on DCA300SSC, DCA300SSCU, and MQP240 generators exactly, seating flush without trimming or adjustment.
• Generator Family Fitment — Confirmed compatibility with Multiquip DCA300SSC, DCA300SSCU, and MQP240 diesel generator models.
• Prevents Coolant Loss — A sound thermostat gasket stops coolant from bypassing the thermostat housing, keeping the engine cooling circuit pressurized and the generator running within its designed temperature range.
• Critical Cooling System Integrity — On high-output generator sets, a failed or degraded thermostat gasket can allow coolant to leak externally or internally, leading to overheating and unplanned shutdowns — replacing it promptly protects engine longevity.

The thermostat gasket forms a pressure-tight seal between the thermostat and its housing in the engine cooling circuit. It prevents coolant from escaping around the thermostat seat, ensuring that coolant is directed correctly based on engine temperature — either recirculated internally when the engine is cold or routed through the radiator once the thermostat opens. When this gasket deteriorates or fails, coolant can leak from the housing, the cooling system loses pressure, and the engine is at risk of overheating, which is especially critical on continuous-duty generator sets like the DCA300SSC and MQP240 where sustained output and thermal stability are essential.

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.