866978 Coolant Pipe | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta coolant pipe from the Cooling System group, weighing 0.227 kg and listed for 15 applications on TAMD series engines. It supersedes 847837, and the drain cock 949918 was moved onto this pipe at the same time.

🚤 Compatibility

Typically suits:

• Volvo Penta TAMD63L-A
• Volvo Penta TAMD63P-A
• Volvo Penta TAMD71B
• Volvo Penta TAMD75P-A
• Volvo Penta TAMD72P-A
• Volvo Penta TAMD72WJ-A
• Volvo Penta TAMD73P-A
• Volvo Penta TAMD73WJ-A
• Volvo Penta TAMD74P-A
• Volvo Penta TAMD74P-B
• Volvo Penta TAMD74A
• Volvo Penta TAMD74C-A
• Volvo Penta TAMD74C-B
• Volvo Penta TAMD74L-A
• Volvo Penta TAMD74L-B

• Engine Family: TAMD

⚙️ Key Features

• Carries the drain cock, part number 949918
• 0.227 kg
• Supersedes 847837
• 15 applications on TAMD engines

🔌 Function

Carries coolant between fixed points on the engine and, on this version, provides the mounting point for the system drain cock.

⚠️ Common Signs of Failure

• Coolant seeping from the drain cock boss or its thread
• Drips or crusting along the pipe run
• Drain cock stiff, seized or weeping when closed
• Pitting or perforation once the pipe is cleaned off
• Joint faces corroded so a new seal will not hold

🛠️ Service Notes

• The drain cock, 949918, moved onto this pipe — check whether yours came off the old pipe 847837 and needs transferring or renewing
• Seal the drain cock thread properly and pressure test the system before the engine is run up

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 866978 → Supersedes 847837

OEM / Related Numbers

• 847837 earlier number superseded by this part

📦 Condition

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