VolvoEngine Parts

20585482 — Expansion Tank 20585482 For Volvo Penta Tad721Ge Engine

This is an expansion tank, also known as an overflow or coolant reservoir, which holds excess coolant and allows for expansion and contraction due to temperature changes. It is constructed from durable plastic designed to withstand engine bay temperatures and coolant chemicals, unlike a brittle or cracked tank that leaks. Operators might observe coolant level dropping unexpectedly, white residue around the tank, or a persistent sweet smell of coolant.

Expansion Tank 20585482 For Volvo Penta Tad721Ge Engine – Part No 20585482 – Volvo Spare Part
Part Specifications
BrandVolvo
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeCoolant Expansion Tank
MaterialHigh-density polyethylene (HDPE)
ApplicationEngine cooling system overflow
Service LifeReplace as needed based on inspection
CompatibilityVolvo Penta TAD721GE
ConditionNew — OEM specification aftermarket

Failure Symptoms

A cracked or leaking expansion tank will first manifest as a gradual loss of coolant without any visible leaks elsewhere in the system. If ignored, the coolant level will drop significantly, leading to potential engine overheating. The system may also lose its ability to maintain proper pressure, compromising overall cooling efficiency.

Installation Tip

Ensure all mounting points are clean and free of debris before installing the new tank to prevent stress fractures. Do not overtighten the mounting hardware, as this can crack the plastic tank.

Service Note

Check the radiator cap for proper sealing and inspect all coolant hoses for signs of swelling or cracking during expansion tank replacement.