21181057 Connector Kit | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta coolant-hose connector kit used when matching an early D4 or D6 cylinder head and heat-exchanger installation. Volvo specifies the kit for exchange long blocks through engine serial 2006033257 and when a replacement cylinder head is supplied without the original pipe connection. The kit restores the hose connection between the cylinder head, freshwater circuit and heat exchanger without reusing damaged early fittings.

🚤 Compatibility

• Engine Family: D
• HP Range: 180-435 HP
• Year Range: Approximately early to mid-2000s
• Serial Range: SN-2006033257

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta D4 / D6 coolant connector repair kit
• Serial-controlled application through 2006033257
• Required with specified exchange long blocks
• Adapts replacement cylinder heads supplied without the pipe connection
• Includes connector and sealing hardware
• Engine type: Volvo Penta common-rail inline 4- or 6-cylinder marine diesel

📋 Kit Contents

• 21181057 coolant-hose connector body - 1
• 21181057 pipe / hose connection adapter - 1
• 21181057 O-ring and sealing-ring set - 1 set
• 21181057 retaining and mounting hardware - 1 set
• Volvo Penta does not publish separate service numbers for the internal kit pieces; all included components are serviced under kit number 21181057

🔌 Function

The kit creates a sealed coolant connection between the cylinder-head outlet and heat-exchanger plumbing.

⚠️ Common Signs of Failure

• Coolant leaks around the cylinder-head hose connection
• Original connector is corroded, cracked or missing
• Replacement cylinder head lacks the required pipe fitting
• O-ring cannot seal because the connector bore is damaged
• Coolant hose alignment is incorrect after long-block replacement

🛠️ Service Notes

• Classified as dangerous goods for carriage - confirm shipping arrangements before ordering

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21181057 → Supersedes 3801172

OEM / Related Numbers

• 3801172 earlier number superseded by this part

OEM Reman Alternatives

• Exchange long-block installations through serial 2004026999

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D6-370A-C, D6-350A-A, D6-350A-B, D6-330A-D, D6-330D-E, D6-370D-E, D6-370D-B, D6-330D-B, D6-370D-A, D6-330D-C, D6-330A-C, D6-370D-C, D6-330D-D, D6-370D-D, D6-370A-D, D6-330A-E, D6-370A-E, D6-330I-D, D6-310I-B, D6-280I-B, D6-280I-C, D6-280I-D, D6-280I-E, D6-310I-D, D6-435I-D, D6-310I-E, D6-280I-A, D6-310I-A, D6-310D-B, D6-310D-D, D6-310D-C, D6-310D-E, D6-370I-A, D6-370I-B, D6-330I-B, D6-330I-C, D6-370I-C, D6-370I-D, D6-310A-B, D6-280A-C, D6-310A-C, D6-310A-A, D6-280A-D, D6-310A-D, D6-280A-E, D6-310A-E, D6-310I-C, D6-280A-A, D6-280A-B, D6-400A-E, D6-435D-A, D6-435D-D, D6-435D-E, D6-435I-A, D6-435I-C, D6-435I-E, D6-435D-C, D6-330I-E, D6-370I-E, D6-330A-B, D6-370A-B
• Volvo Penta D4-260A-B, D4-260A-A, D4-260A-C, D4-260A-D, D4-260A-E, D4-260D-B, D4-260D-C, D4-260D-D, D4-260D-E, D4-260I-A, D4-260I-B, D4-260I-C, D4-260I-D, D4-260I-E, D4-300A-A, D4-300A-C, D4-300A-D, D4-300A-E, D4-300D-A, D4-300D-C, D4-300D-D, D4-300D-E, D4-300I-A, D4-180I-C, D4-225I-C, D4-180I-D, D4-225I-D, D4-180I-E, D4-225I-E, D4-210A-A, D4-210A-B, D4-225A-B, D4-225A-C, D4-225A-D, D4-300I-C, D4-300I-D, D4-300I-E, D4-225A-E, D4-210I-A, D4-210I-B, D4-180I-B, D4-225I-B