3979103 Oil Line | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta oil line weighing 0.130 kg and listed for 1 application on the DH series. It supersedes part number 425421. It is grouped under the Fuel System despite its name, and it sits only 4 grams from oil line 3979104, which covers 3 THD applications — the engine family, not the weight, is what separates them.

🚤 Compatibility

Typically suits:

• Volvo Penta DH10A

• Engine Family: DH

⚙️ Key Features

• 0.130 kg
• Supersedes 425421
• 1 application on the DH series
• Only 4 grams from oil line 3979104, which is the THD listing

🔌 Function

Carries oil under pressure between two fixed points on the engine along a set route.

⚠️ Common Signs of Failure

• Oil misting or running along the line
• Weeping at a union or a cracked flare
• Line rubbed thin where it passes a bracket
• Pressure lower than expected at the far end

🛠️ Service Notes

• This is the DH listing and 3979104 is the THD listing — the two are too close in weight to tell apart, so order by number
• Fit new sealing washers at the unions and check for leaks at working temperature

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3979103 → Supersedes 425421

📦 Condition

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