Volvo Penta Coolant Hose 21162074

Volvo Penta Coolant Hose – Part Number 21162074

The Volvo Penta Coolant Hose (OEM Part No. 21162074) is a genuine OEM replacement hose for the Volvo Penta cooling system. Current parts diagram references place this hose in the expansion tank assembly, where it routes coolant between the expansion tank and the surrounding cooling circuit. It is a small but critical component — a failed or deteriorated hose at this position can cause coolant loss and overheating.

Part Details

• Part Number: 21162074
• Brand: Volvo Penta
• Official Product Type: Coolant Hose
• MPN: 21162074
• System: Engine Cooling System / Expansion Tank Assembly
• Approximate Weight: 0.038 kg

Compatible Applications

• Volvo Penta marine engines – fitment is confirmed by exact diagram position in the expansion tank cooling circuit
• Confirm part number 21162074 against your engine serial number and the Volvo Penta cooling system parts diagram before ordering
• Fitment can vary by engine family, cooling system layout, and serial number range — especially on engines that have had prior hose, tank, or fitting changes

System & Diagram Position

This hose is part of the expansion tank assembly within the Volvo Penta engine cooling system. It appears in the cooling system diagram alongside the expansion tank, pressure cap, hose clamps, and related fittings. Confirm the exact diagram position for your engine before ordering — nearby hoses can look similar once removed from the engine.

Parts Desk Insights

Best use case: This is the correct replacement when the original hose at the expansion tank position shows cracking, swelling, hardening, soft spots, or coolant seepage. It’s also a smart proactive replacement when servicing the expansion tank assembly — if the tank or pressure cap is being removed, replacing the hose at the same time avoids a repeat job later.

Common issues: Cooling system hoses are easy to mis-order because adjacent hoses can look nearly identical once they’re off the engine. Matching the exact Volvo Penta diagram position is much more reliable than comparing hose length and bend angle by eye. If you’re unsure which hose is which, photograph the routing before removal and cross-reference the part number on the diagram.

Related Parts

• Volvo Penta Expansion Tank Pressure Cap 1542591
• Volvo Penta Expansion Tank Pressure Cap 1674083
• Volvo Penta D6 Expansion Tank Pressure Cap 23321023
• Volvo Penta Expansion Tank Kit 24705965
• Volvo Penta Expansion Tank Kit 24768602
• Volvo Penta Cooling Hose 21114718

Service Interval

Inspect all cooling system hoses annually. Replace immediately if cracking, swelling, hardening, soft spots, or coolant seepage is present. It is good practice to replace cooling hoses whenever the expansion tank or surrounding assembly is disturbed during service. Consult your Volvo Penta service manual for engine-specific cooling system service intervals.

Technical FAQ

Q: How do I confirm this is the right hose for my engine?
A: Cross-reference part number 21162074 with your engine serial number and the Volvo Penta cooling system parts diagram. The safest approach is to match the exact diagram position rather than comparing hose dimensions by eye.

Q: Is this a genuine OEM hose?
A: Yes. This is a genuine Volvo Penta OEM coolant hose, not an aftermarket substitute.

Q: Should I replace the hose clamps at the same time?
A: Yes. It is best practice to inspect and replace hose clamps whenever a cooling hose is replaced to ensure a proper seal and avoid repeat coolant leaks.

Q: What are the signs that this hose needs replacing?
A: Look for cracking, swelling, hardening, soft spots, abrasion damage, or any visible coolant seepage at the hose connections. Age-related deterioration can occur even without obvious external damage.