11031743 Nipple | Genuine Volvo Penta Part

🔧 Product Description

This is a genuine Volvo Penta cooling system nipple, a threaded connector fitting used at a coolant port or hose junction within the engine's cooling circuit. It serves as the take-off point that allows a coolant line or sensor connection to be joined to the engine or heat exchanger without leakage. It supersedes two earlier part numbers and is the current replacement for a broad span of Volvo Penta inline-six and V-type marine and industrial diesel engines.

🚤 Compatibility

• Engine Family: TD, TAMD, TWD, TID
• Year Range: Approximately 1980s - 2000s

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 11031743
• System group: Cooling System
• Net weight: 0.054 kg
• Supersedes previous part numbers 11033336 and 4804282
• Fits TD, TID, TWD, TAMD 60/70/100/120/160-series marine and industrial diesel engines
• Engine type: Volvo inline 6-cylinder marine-commercial / industrial diesel

🔌 Function

The nipple provides a sealed threaded connection point in the engine cooling circuit so coolant hoses or lines can be attached to the engine, expansion tank or heat exchanger. It maintains a pressure-tight joint while allowing coolant to pass between components.

⚠️ Common Signs of Failure

• Coolant seepage or drips at the fitting when the system is under pressure
• Corroded or pitted threads preventing a proper seal
• Cracked or deformed body after over-tightening or impact
• Repeated loss of coolant and low expansion tank level with no other visible leak
• Hose will not seat securely or blows off under operating pressure

🛠️ 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

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 11031743 → Supersedes 11033336

OEM / Related Numbers

• 4804282 earlier number superseded by this part
• 11033336 earlier number superseded by this part
• 837185 related thermostat housing
• 3831424 related thermostat kit
• 3831425 related thermostat kit

Aftermarket / Verified Equivalents

• SLP: NI-743

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAMD74P-A, TAMD74P-B, TAMD74A, TAMD74C-A, TAMD74C-B, TAMD74L-A, TAMD74L-B
• Volvo Penta TAMD162A, TAMD162B, TAMD162C, TAMD162C-B
• Volvo Penta TAMD122P-A, TAMD122P-B, TAMD122P-C
• Volvo Penta TAMD102A, TAMD102D
• Volvo Penta TAMD63L-A, TAMD63P-A
• Volvo Penta TAMD73P-A, TAMD73WJ-A
• Volvo Penta TD61A, TD61AW
• Volvo Penta TD71A, TD71AW
• Volvo Penta TWD1230ME, TWD1230VE
• Volvo Penta TAMD103A
• Volvo Penta TAMD75P-A
• Volvo Penta TD1030VE
• Volvo Penta TD121G-87
• Volvo Penta TD610M
• Volvo Penta TD630ME
• Volvo Penta TD730ME
• Volvo Penta TID71A
• Volvo Penta TWD1030ME
• Volvo Penta TWD1031VE
• Volvo Penta TWD1231VE
• Volvo Penta TWD630ME
• Volvo Penta TWD730ME