21197956 Nipple | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta threaded cooling-system nipple used where part number 21197956 is specified. The nipple provides the correctly sized hose connection and internal passage for the coolant circuit and must match the original thread, shoulder and hose diameter.

⚙️ Key Features

• Genuine Volvo Penta cooling-system nipple
• Officially classified in the Cooling System category
• Correct thread and hose-tail geometry
• Designed for coolant pressure and temperature
• Use the specified sealing washer or thread seal from the engine schematic
• Engine type: Volvo Penta marine or industrial engine cooling circuit

🔌 Function

Provides a sealed transition from a threaded coolant passage to a flexible hose connection.

⚠️ Common Signs of Failure

• Coolant or seawater leakage around the component
• Restricted flow, corrosion scale or internal blockage
• Pressure loss, aeration or repeated overheating alarms
• Visible pitting, cracking or damaged sealing surfaces

🛠️ Service Notes

• Check the bore is clear before fitting — a nipple is often the feed point or restriction for a circuit, and debris left in it will starve whatever it supplies
• On tapered threads use the paste or liquid sealant specified for the fluid concerned, applied a few threads back from the open end; avoid thread tape on fuel and oil lines, where a shed shred travels downstream into filters, pumps and injectors
• Where the nipple seals on a face or against a washer rather than on its thread, fit a new sealing washer instead of curing a weep by overtightening
• Tighten to the figure in the workshop manual for your engine — these are small fittings in castings and are easily stripped, or the surrounding boss cracked
• Support the pipe or hose so it meets the nipple square and without side load, then check the joint at working pressure and temperature

📦 Condition

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