21689510 Service Kit | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta service package for the cooling-system vacuum valve used on selected D1 and D2 marine diesels. The anti-siphon valve prevents raw water continuing to flow into the exhaust system when the engine is stopped.

🚤 Compatibility

• HP Range: Approximately 13-75 HP

⚙️ Key Features

• Genuine Volvo Penta anti-siphon service kit
• Restores vacuum-valve operation
• Suitable for selected D1 and D2 exhaust / cooling installations
• Protects against seawater siphoning
• Small service kit for the existing valve body
• Engine type: Volvo Penta D1 / D2 marine diesel raw-water cooling and exhaust system

📋 Kit Contents

• 1 x vacuum-breaker valve element - supplied under Volvo Penta kit 21689510
• 1 x valve end cap - supplied under Volvo Penta kit 21689510
• Internal sealing component - supplied with the complete service kit; no separate public part number is listed

🔌 Function

The valve admits air when the raw-water pump stops, breaking the siphon and preventing seawater from flooding the exhaust and engine.

⚠️ Common Signs of Failure

• Valve drips or remains blocked with salt deposits
• Water siphons through the exhaust after shutdown
• Vacuum breaker does not admit air
• Valve cap or seal is damaged
• Routine anti-siphon maintenance is due

🛠️ Service Notes

• Service kits are built for a specific engine family and serial-number range, and contents change between builds — confirm the kit against your engine's serial number before ordering
• Check the kit against the job before you start and fit it complete; leaving out the parts that still look serviceable defeats the point of a kit
• Renew every gasket, seal and O-ring supplied even where the old ones appear sound, and follow the tightening sequences and figures in the workshop manual for your engine
• Record the work and the engine hours when the kit goes in, so the next service falls due at the interval Volvo Penta specifies for your engine

📦 Condition

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