21195401 Plug | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta threaded plug used in the thermostat housing on TAD1340VE through TAD1345VE industrial engines. It closes the designated coolant passage and must retain the correct seal to maintain cooling-system pressure.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD1340VE
• Volvo Penta TAD1341VE
• Volvo Penta TAD1342VE
• Volvo Penta TAD1343VE
• Volvo Penta TAD1344VE
• Volvo Penta TAD1345VE
• Volvo Penta TAD1350VE

• Engine Family: TAD

⚙️ Key Features

• Genuine Volvo Penta thermostat-housing plug
• Confirmed TAD1340VE-TAD1345VE cooling-system family
• Correct thread and sealing face for the OEM housing
• Used with the associated sealing part from the schematic
• Inspect for corrosion whenever the thermostat housing is serviced
• Engine type: Volvo Penta 12.8-litre inline-six industrial diesel

🔌 Function

Seals a service or drilling passage in the thermostat housing so coolant pressure and flow are maintained.

⚠️ 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

• Clean the threads and the seating face before fitting, and make sure the opening itself is clear of old sealant, swarf and corrosion
• Renew the sealing washer or O-ring where one is fitted rather than reusing a flattened one, and only use thread sealant where the workshop manual for your engine calls for it
• Tighten to the figure given in the workshop manual for your engine — plugs in aluminium and other soft castings strip easily, and a plug pulled up hard to cure a leak usually distorts the seat and makes it worse
• Where the plug closes an oil, fuel or coolant passage, run the engine up to temperature afterwards and check the joint under pressure before signing the job off
• Keep removed plugs paired with the holes they came out of during a strip-down — plugs of very similar appearance often differ in thread, reach or sealing type

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 21297163 - thermostat housing
• 21412639 - thermostat
• 1547253 - sealing ring
• 21298915 - sealing strip
• 21525512 - coolant pipe

📦 Condition

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