21836402 Valve Kit | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta serviced valve assembly used in the radiator-cooling circuit of selected TAD16 and TWD16 generator engines. It is positioned in the water-pump, thermostat-housing and radiator pipe group and controls coolant flow through the applicable auxiliary branch.

🚤 Compatibility

Typically suits:

• Volvo Penta TWD1643GE
• Volvo Penta TWD1652GE
• Volvo Penta TWD1653GE
• Volvo Penta TWD1663GE

• Engine Family: TWD
• HP Range: Approximately 500-800 HP
• Year Range: Approximately 2010s

⚙️ Key Features

• Genuine complete coolant valve assembly
• Used in the 16-litre radiator-cooling pipework
• Factory-calibrated internal valve mechanism
• Supplied as a complete service unit
• Engine and cooling-system serial configuration must be checked
• Engine type: Volvo Penta inline 6-cylinder 16-litre generator diesel

📋 Kit Contents

• Complete coolant valve assembly - Volvo Penta 21836402
• Internal valve, seat, seals and body components are serviced only as kit 21836402; Volvo does not publish separate internal component numbers
• Connection hoses, flange screws and external clamps shown around the valve are separate installation parts

🔌 Function

The valve regulates or isolates coolant flow through the specified radiator-cooling branch, supporting stable warm-up and operating temperature.

⚠️ Common Signs of Failure

• Engine temperature fluctuates
• Coolant circulation through the branch is restricted
• Valve sticks open or closed
• Coolant leaks from the valve body or seals
• Internal corrosion or deposits prevent correct movement

🛠️ Service Notes

• Supplied as a kit for radiator-cooled Volvo Penta TWD16 generator-set engines. It consolidates the earlier separately-listed coolant valve, connection pipe and hose connection, so order the kit rather than chasing the superseded numbers.
• Drain the cooling system down past the joint before opening it, and catch the coolant — it is worth keeping only if it is clean and still within its service life.
• Fit every new sealing ring and gasket the kit supplies. Hardened rings off the old assembly will not reseal.
• Tighten fixings and hose clamps to the figures in the workshop manual for your engine, then refill, bleed the system, run the engine up to temperature and check the joints both hot and cold.
• Parts for this area of the cooling system are split by engine serial number, so check yours against the parts list before ordering.

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21836402 → Supersedes 21544701 → Supersedes 3886586

OEM / Related Numbers

• 3889524 earlier number superseded by this part
• 3885230 earlier number superseded by this part
• 21544701 earlier number superseded by this part
• 3886586 earlier number superseded by this part
• 946652 - related coolant hose
• 984735 - related flange screw
• 969033 - related coolant hose
• 961666 - related hose clamp
• 21412639 - related thermostat references in the same cooling assembly
• 21613426 - related thermostat references in the same cooling assembly
• 21412642 - related thermostat references in the same cooling assembly

📦 Condition

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