866585 Coolant Pump | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta coolant pump for engines from serial number 213480 onwards, from the Cooling System group, weighing 13.798 kg and listed for 12 applications across TMD, TAMD, TAD and TD series engines. It consolidates two earlier numbers, 478800 and 875648, catalogued as a water pump.

🚤 Compatibility

Typically suits:

• Volvo Penta TMD121C
• Volvo Penta TMD122A
• Volvo Penta TAMD121D
• Volvo Penta TAMD122A
• Volvo Penta TAMD122A/C
• Volvo Penta TAMD122D
• Volvo Penta TAMD122P-A
• Volvo Penta TAMD122P-B
• Volvo Penta TAMD122P-C
• Volvo Penta TAD121CHC
• Volvo Penta TD121CHC
• Volvo Penta TD121CRC

• Engine Family: TMD, TAMD, TAD, TD
• Serial Range: SNXXXXXXXXXX/213480-

⚙️ Key Features

• For engines from serial number 213480 onwards
• 13.798 kg
• Listed for 12 applications across four engine series
• Consolidates 478800 and 875648, catalogued earlier as a water pump
• Also supersedes Volvo part numbers 822547 and 843440

🔌 Function

Circulates coolant through the block, head and heat exchanger whenever the engine is running.

⚠️ Common Signs of Failure

• Coolant dripping from the weep hole under the pump
• A rumble, whine or growl from the pump that rises with engine speed
• Play felt at the pulley or hub when rocked by hand
• Engine running hot at all loads once flow drops off
• Impeller found corroded or eroded on strip-down

🛠️ Service Notes

• Renew the drive belt and check the tensioner and idlers while the pump is off
• Flush the circuit and refill with coolant of the correct specification - exhausted coolant is what eats the next pump
• At nearly 14 kg this is a two-hand lift, so support it before the last mounting bolts come out

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 866585 → Supersedes 478800

OEM / Related Numbers

• 875648 earlier number superseded by this part
• 478800 earlier number superseded by this part

📦 Condition

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