20715491 Hose Nipple | Genuine Volvo Penta Part

🔧 Product Description

Threaded hose nipple used at a Volvo Penta cooling-system connection, commonly within the water-pump or thermostat-housing circuit. It provides the original hose diameter, thread and sealing geometry for a secure coolant connection.

⚙️ Key Features

• OEM thread and hose-tail dimensions
• Maintains the original coolant-hose routing and flow area
• Designed for hot coolant, pressure cycling and engine vibration
• Works with the specified hose clamp and thread seal arrangement
• Direct replacement for a corroded, cracked or damaged nipple
• Engine type: Volvo Penta liquid-cooled marine or industrial diesel

🔌 Function

Provides a sealed transition from a threaded cooling-system port to a flexible coolant hose without restricting the designed coolant flow.

⚠️ Common Signs of Failure

• Coolant seepage at the thread or hose connection
• Corrosion, pitting or cracking of the nipple body
• Hose loosening because the hose-tail surface is worn or damaged
• Restricted coolant flow from scale or internal obstruction
• Coolant loss followed by rising engine temperature

🛠️ Service Notes

• Fit a new sealing washer or ring whenever the nipple is disturbed, and check that the seat in the housing is clean and undamaged
• Take care in aluminium and light-alloy housings — the thread in the casting is weaker than the nipple, so tighten to the figure in the workshop manual for your engine rather than going by feel
• Check that the bore is clear before fitting; these are small-bore fittings and are easily blocked by scale, sealant or debris
• Hold the nipple with a spanner while tightening or slackening the hose union on it, so the load is not carried by the casting
• Support the hose so it leaves the nipple without side load or a tight bend, and re-check the joint for weeping after the engine has been run and allowed to cool

📦 Condition

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