Volvo Surge Tank Coolant Cap - 20968843 21314359 572.2021

• Precise Pressure Control: Engineered with a heavy-duty internal relief spring to maintain the exact factory pressure specifications, raising the coolant boiling point and preventing engine overheating.
• Prevents Coolant Loss: Features a highly durable, heat-resistant internal gasket that creates a perfect, airtight seal against the surge tank neck, stopping costly and dangerous coolant leaks.
• Heavy-Duty Construction: Molded from industrial-grade, thermal-resistant polymers designed to survive the brutal under-hood temperatures and constant vibration of a Class 8 commercial truck.
• Vital Preventative Maintenance: A cheap and easy replacement that prevents water pump cavitation, blown hoses, and massive head gasket failures caused by a depressurized cooling loop.
• Direct Aftermarket Replacement: Provides a seamless, true drop-in replacement for Volvo factory part numbers 20968843 and 21314359 without the dealership markup.

Protect your heavy-duty engine from catastrophic overheating and coolant loss with this premium Volvo Surge Tank Coolant Cap by FleetPro Parts & Tires. A failing or weakly sprung reservoir cap will cause your cooling system to lose pressure, lowering the boiling point of your coolant and leading to dangerous overheating during heavy hauls. We stock these heavily right here in our Hanover Park, Illinois warehouse to ensure lightning-fast shipping for fleets, diesel repair shops, and owner-operators nationwide.

Prevent Engine Overheating: The Volvo Surge Tank Coolant Cap Advantage

This Volvo Surge Tank Coolant Cap (Part # 572.2021) is strictly engineered to hold the exact factory-specified system pressure for Volvo commercial trucks. Manufactured from heavy-duty, heat-resistant polymers and featuring a resilient inner sealing gasket, it safely manages the extreme thermal expansion and contraction cycles of your diesel engine's coolant. By maintaining the correct pressure threshold, this cap prevents boil-overs and ensures your water pump operates without cavitation.

As we continue to build the largest inventory of commercial truck parts in Illinois, we prioritize cooling system hardware that offers reliable, "bolt-on" performance. This cap is a professional-grade aftermarket replacement for Volvo factory part numbers 20968843 and 21314359. Manufactured by Automann to Fleet Standard levels, upgrading this simple but vital component is the cheapest insurance policy against a blown head gasket and massive downtime.

Vehicle Fitment & Compatibility

This heavy-duty surge tank cap is precision-engineered for the following commercial applications:

• Make: Volvo
• Component Group: Engine & Cooling / Radiator & Surge Tanks
• Application: Pressurized Coolant Expansion / Surge Tank

Direct Replacement & Cross-Reference Numbers:

This cap serves as a direct exact-fit replacement for the following part numbers:

• Volvo Factory Numbers: 20968843, 21314359
• Automann Aftermarket: 572.2021

Technical Specifications

• Component Type: Coolant Surge Tank Cap / Expansion Tank Cap
• Function: Pressure Relief & System Sealing
• Product Level: Fleet Standard
• Brand: Automann (Distributed by FleetPro Parts & Tires)