425951 Oil Cooler | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta oil cooler weighing 4.571 kg and listed for 4 applications across THD and DH series engines. It is the larger of the two coolers here, with 465854 at 2.465 kg covering TWD, TID and TD engines. It is a raw-water cooled heat exchanger, and the hose connection sizes are worth checking against the unit coming off.

🚤 Compatibility

Typically suits:

• Volvo Penta THD102KB
• Volvo Penta THD102KD
• Volvo Penta THD102K-KB
• Volvo Penta DH10A

• Engine Family: THD, DH

⚙️ Key Features

• 4.571 kg
• 4 applications across THD and DH series engines
• Larger than oil cooler 465854, which weighs 2.465 kg
• Raw-water cooled heat exchanger

🔌 Function

Passes engine oil across a coolant or seawater circuit to hold oil temperature down, protecting the oil film at high load.

⚠️ Common Signs of Failure

• Oil temperature running high, with oil pressure falling when hot
• Oil in the coolant or coolant in the oil, giving a milky emulsion
• Weeping or crusted salt deposits around the cooler end covers
• Cooler externally furred or internally silted, so it no longer sheds heat
• Engine coolant loss with no visible external leak

🛠️ Service Notes

• Pressure test before condemning the cooler, since an oil-and-coolant mix can come from elsewhere
• Renew all the end cover seals and o-rings when the cooler is disturbed
• Fit a fresh oil filter and change the oil after any internal cross-contamination

📦 Condition

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