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Automann · Cooling System
572.2021
In stock · ships from Knoxville
This is a coolant surge tank (expansion tank) cap engineered for Volvo and Mack heavy-duty trucks.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 18 applications
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All confirmed applications for this part number.
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Verify by original Volvo part numbers 20968843 or 21314359 on your existing cap or surge tank.
Part data verified against 2 catalog sources
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It seals the cooling system and maintains the factory-set pressure to raise the coolant boiling point, preventing dangerous boil-overs and ensuring the water pump operates without cavitation. Replacing a worn or weak cap is a low-cost way to avoid overheating, coolant loss, and potential head gasket failure.
Part Number: 572.2021
SURGE TANK CAP
Unit: ea
Dealer: Post Onsite
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