21710298 Oil Cooler | Genuine Volvo Penta Part

🔧 Product Description

A genuine raw-water-cooled shell-and-tube cooler used to remove heat from the fuel or power-steering oil circuit on selected Volvo Penta KAD marine engines. The 21710298 cooler replaces earlier number 858541.

🚤 Compatibility

• HP Range: Approximately 230-260 HP
• Year Range: Approximately 1997 - 2005

⚙️ Key Features

• Raw-water-cooled shell-and-tube cooler removing heat from the fuel or power-steering oil circuit
• 0.533 kg
• Supersedes 858541
• Recorded against 53 applications across MD, TMD, AD, TAMD, AQAD and D series

🔌 Function

Transfers heat from the fuel or steering-oil circuit into the engine cooling-water flow without mixing the two fluids.

⚠️ Common Signs of Failure

• Water or coolant found in the fuel or steering oil
• Oil traces showing in the cooling water side
• Oil circuit running hotter than normal
• Weeping at the end caps or a wet, salt-crusted body
• Tube stack found corroded or pinholed on strip-down

🛠️ Service Notes

• Renew the end-cap O-rings and gaskets when the cooler is opened or fitted
• Pressure-test the existing cooler before condemning it - a weep at the end cap is often the seal, not the stack

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21710298 → Supersedes 858541

OEM / Related Numbers

• 858541 earlier number superseded by this part

Aftermarket / Verified Equivalents

• Seakamp / Promt Parts: PP-21710298

📦 Condition

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