6646938 Hose | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta hose from the Inlet and Exhaust System group, described in the source as running from the oil filling point to the air filter, weighing 0.265 kg and listed for 7 applications across TMD, TAMD and MD series engines. It supersedes part number 859745.

🚤 Compatibility

Typically suits:

• Volvo Penta TMD22A
• Volvo Penta TMD22B
• Volvo Penta TMD22P-C
• Volvo Penta TAMD22P-B
• Volvo Penta MD22A
• Volvo Penta MD22L
• Volvo Penta MD22P

• Engine Family: TMD, TAMD, MD

⚙️ Key Features

• Runs from the oil filling point to the air filter
• 0.265 kg
• Supersedes 859745
• 7 applications across TMD, TAMD and MD series engines

🔌 Function

Carries crankcase breather vapour from the oil filling point through to the air filter.

⚠️ Common Signs of Failure

• Hose perished, split or gone soft with oil soaking
• Oil mist or vapour escaping into the engine bay
• Crankcase pressure building, pushing oil past seals
• Hose collapsed internally so the breather is restricted
• Oil pooling in the hose or at the air filter

🛠️ Service Notes

• Check the air filter and inlet for oil accumulation while the hose is off, as a blocked breather route pushes oil forward
• Route the new hose on its original path with no low point where oil can collect, and secure it with its clamps

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 6646938 → Supersedes 859745

OEM / Related Numbers

• 859745 earlier number superseded by this part

📦 Condition

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