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CUMMINS Marine Parts
THERMOSTAT QSK60
Availability: 2-7 days
Shipping: Worldwide
THERMOSTAT QSK60 #4
Product Details
Part Number
4065566
Description
THERMOSTAT QSK60 #4
Brand
CUMMINS
Category
Others
Availability
2-7 days
Shipping
Worldwide
Price
On Request
Product Description
CUMMINS Engine thermostat 4065566
1. Product Overview
CUMMINS Engine thermostat 4065566 is listed under source title “THERMOSTAT QSK60”. It is classified for this pilot as engine thermostat within the engine cooling control system. The source title references QSK60, but that association has not been independently verified for this pilot. Confirm the complete engine model, serial number, and arrangement before ordering.
2. Function and Operating Principle
A thermostat regulates coolant flow according to temperature so the engine can warm up and remain within its intended operating range. Opening temperature, lift, bypass arrangement, housing, and sealing must match the cooling system.
A temperature-sensitive element moves the valve as coolant temperature changes. This redirects or increases flow through the radiator or heat exchanger while coordinating with the bypass circuit.
3. Application Status
| Manufacturer / brand | CUMMINS |
|---|---|
| Part number | 4065566 |
| Component category | Engine thermostat |
| System | Engine cooling control |
| Evidence level | C — Component identity only |
| Engine application | Source title references QSK60; verification required |
4. Typical Signs That Inspection May Be Required
| Observation | Possible significance |
|---|---|
| Slow warm-up or low operating temperature | May be associated with a thermostat stuck open or other cooling-system conditions. |
| High or fluctuating temperature | Can involve thermostat operation, coolant level, flow, pumps, restriction, or loading. |
| Coolant leakage at the housing | May involve seals, surfaces, fasteners, or housing damage. |
| Uneven hose or housing temperature | Requires controlled diagnosis of coolant circulation. |
These observations are inspection triggers rather than a confirmed diagnosis. Evaluate the complete engine system and follow the applicable manufacturer service information.
5. Inspection and Replacement Guidance
- Allow the cooling system to depressurize and cool safely.
- Inspect coolant condition, housing, seals, bypass, pump, and flow restrictions.
- Test only by the approved temperature and lift procedure.
- Confirm opening specification and engine arrangement.
6. Information Required Before Ordering
- Complete engine or equipment model.
- Engine serial number and arrangement or configuration number.
- Installed part reference and clear photographs of the identification label.
- Installation position and related assembly information.
Compatibility notice: Verify 4065566 against serial-number-specific parts documentation before purchase or installation. Do not select the component by appearance or part-number similarity alone.