3853983 Thermostat | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta thermostat for seawater cooled engines, weighing 0.029 kg and listed for 137 applications. The accessories catalogue prints it as the thermostat for the 7.4GL, the 7.4Gi, GSi and DPX385, the 8.2GL and the 8.2GSi and DPX415, and as the raw water thermostat for the 8.1Gi, 8.1GXi and 8.1OSi engines, where freshwater cooled installations take thermostat kit 3831426 instead. Seal ring 3852071 and gasket 3852111 are listed with it.

🚤 Compatibility

• Engine Family: DPX

Full model list at the end of this description.

⚙️ Key Features

• For seawater cooled engines - freshwater installations on the 8.1 engines take kit 3831426
• Listed for the 7.4 and 8.2 litre petrol engines and the 8.1Gi, GXi and OSi
• 0.029 kg
• Seal ring 3852071 and gasket 3852111 are listed alongside it
• 137 listed applications
• Thermostat
• Genuine Volvo Penta Part, designed and manufactured to ensure original fit, safety and performance
• Role: Thermostat
• Fits: 7.4GL; 7.4Gi, GSi, DPX385; 8.2GL; 8.2GSi, DPX415; 8.1Gi-J/JF, GXi-J/JF, OSi-J/JF (raw); 8.1Gi-H/HF, 8.1GXi-G/GF, 8.1OSi-D/DF (raw)

🔌 Function

Holds the engine at its working temperature by restricting coolant flow until the set temperature is reached, then opening.

⚠️ Common Signs of Failure

• Engine slow to warm up or never reaching temperature
• Overheating or temperature alarm shortly after start-up
• Temperature gauge swinging up and down in normal running
• Thermostat stuck part open or corroded in its seat on removal
• Poor cabin heat output where a heater is fitted

🛠️ Service Notes

• This is the seawater cooled version, so confirm which cooling arrangement your engine has before ordering
• Renew seal ring 3852071 and gasket 3852111 with it - both are listed against the same engines
• Check the impeller and raw water strainer before blaming the thermostat for an overheat
• Always refer to the operator's manual for the recommended maintenance and service intervals for your engine and drive
• Listed against more than one engine or drive family - check the qualifier that applies to your own engine or drive

🔄 Supersession & Cross Reference

Aftermarket / Verified Equivalents

• Sierra: 18-3676
• Mallory: 9-43026

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 8.1Gi-B, 8.1Gi-BF, 8.1Gi-C, 8.1Gi-CF, 8.1GiC-J, 8.1GiC-JF, 8.1GiCE-JF, 8.1GiCE-J, 8.1GiCE-M, 8.1GiCE-P, 8.1GiC-Q, 8.1GiCE-Q, 8.1Gi-D, 8.1Gi-DF, 8.1Gi-E, 8.1Gi-EF, 8.1GiE-JF, 8.1GiE-J, 8.1GiE-KF, 8.1GiE-K, 8.1GiE-M, 8.1GiE-MF, 8.1GiE-P, 8.1Gi-F, 8.1Gi-FF, 8.1Gi-G, 8.1Gi-GF, 8.1Gi-H, 8.1Gi-HF, 8.1GiI-A, 8.1GiI-B, 8.1GiI-C, 8.1GiI-D, 8.1GiI-E, 8.1GiI-F, 8.1GiI-G, 8.1GiI-H, 8.1Gi-J, 8.1Gi-JF, 8.1GSi-A, 8.1GSiI-A, 8.1GXi-A, 8.1GXi-AF, 8.1GXi-B, 8.1GXi-BF, 8.1GXi-C, 8.1GXi-CF, 8.1GXi-D, 8.1GXi-DF, 8.1GXi-E, 8.1GXi-EF, 8.1GXiE-JF, 8.1GXiE-J, 8.1GXiE-K, 8.1GXiE-KF, 8.1GXiE-M, 8.1GXiE-P, 8.1GXi-F, 8.1GXi-FF, 8.1GXi-G, 8.1GXi-GF, 8.1GXiI-A, 8.1GXiI-B, 8.1GXiI-C, 8.1GXiI-D, 8.1GXiI-E, 8.1GXiI-F, 8.1GXiI-G, 8.1GXi-J, 8.1GXi-JF, 8.1IPSE-KF, 8.1OSi-A, 8.1OSi-AF, 8.1OSi-B, 8.1OSi-BF, 8.1OSi-C, 8.1OSi-CF, 8.1OSi-D, 8.1OSi-DF, 8.1OSi-J, 8.1OSi-JF, 8.1OSiE-JF, 8.1OSiE-J, 8.2GLIMDM, 7.4GiINCCCE, 7.4GiINCSCE, 7.4GiPEFS, 7.4GiPBYCCE, 7.4GiPLKDCE, 7.4GiPLKECE, 7.4GiPNCACE, 7.4GiPNCSCE, 7.4GiPNCBCE, 7.4GiPNCMCE, 7.4GiPWTR, 7.4GLIMDM, 7.4GLINCS, 7.4GLPLKD, 7.4GLPLKE, 7.4GLPMDA, 7.4GLPMDM, 7.4GLPNCA, 7.4GLPNCB, 7.4GLPNCM, 7.4GLPNCS, 7.4GSiPBYCCE, 7.4GSiPEFS, 7.4GSiPWTR, 7.4GSiXNCB, 7.4GSiXNCM, 3.0GSMBYMCE, 8.2GLPMDA, 8.2GLPMDM, 8.2GSiPBYCCE, 8.2GSiPEFS, 8.2GSiPWTR, 8.2GSiXNCB, 7.4GIIHUBCE, 7.4GLIHUB, 7.4GLINCC, 7.4GSIINCS, 7.4GSIINCC
• Volvo Penta DPX420-CF, DPX420-DF, DPX420-A, DPX420-B, DPX420-BF
• Volvo Penta DPX375-A, DPX375-B, DPX375-BF, DPX375-CF
• Volvo Penta DPX385XBYDCE, DPX385XEFS, DPX385XLKE
• Volvo Penta DPX415XEFS, DPX415XLKE, DPX415XBYDCE