Volvo Penta Thermostat 3842015

Volvo Penta 3842015 is a genuine OEM engine thermostat used in Volvo Penta compact marine diesel cooling systems. Current Volvo Penta dealer references list it as Thermostat and show the strongest confirmed fitment on D1 and D2 series engines, including D1-13, D1-20, D1-30, and D2-40 variants.

Key Features

• Genuine Volvo Penta OEM part number 3842015.
• Used in the engine cooling system to regulate coolant temperature.
• Strong current fitment support for D1-13, D1-20, D1-30, and D2-40 engine families.
• Current parts references commonly list this thermostat at 90C / 194F operating temperature.
• Current catalog weight references range from approximately 0.084 kg to 0.2 kg, depending on listing format and packaging.

Engine Compatibility

The strongest supportable fitment for Volvo Penta 3842015 is Volvo Penta D1 and D2 marine diesel engines, including D1-13, D1-13B, D1-13F, D1-20, D1-20B, D1-20F, D1-30, D1-30B, D1-30F, D2-40, D2-40B, and D2-40F. Some current references also list broader D2 coverage, so final confirmation should be made by serial number and cooling-system diagram.

Serial Number Fitment Notice

Verify fitment by exact engine serial number and the correct Volvo Penta cooling system / thermostat housing parts diagram before ordering. Thermostats can vary by engine version, production range, and housing layout, so serial-number confirmation is the safest way to match this part correctly.

When This Part Needs Replacement

Replace this thermostat when the engine is running too cool, overheating, warming up slowly, showing unstable operating temperature, or when the thermostat is removed during cooling-system service. A thermostat that sticks open or closed can affect engine temperature control and cooling-system reliability.

Installation Notes

Install 3842015 only after confirming the correct thermostat housing and sealing components for the engine being serviced. Current references note that related sealing O-rings may be required separately on some applications, so the housing seals should be inspected or replaced during thermostat service.

Alternate/Superseded Part Numbers

Current sources show 3842015 as the active Volvo Penta OEM reference. Related aftermarket or replacement references include RM3842015 and REC3842015, but the correct OEM number for this listing is 3842015.

Parts Desk Insight

With thermostats, the important match is the engine series, opening temperature, and housing layout. A quick serial-number check helps avoid mixing up similar D1/D2 cooling-system parts that look close but do not belong in the same thermostat housing.

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