VOLKSWAGEN COMMERCIAL CADDY 1.6 Year: 1992 - 06 Engine: HM
Thread Size: 48mm
Original Equipment Quality
When the coolant temperature drops, the coolant will contract and create a vacuum. At this time, the vacuum valve opens and draws coolant from the reservoir tank back into the radiator; bringing it to the proper level. The radiator cap seals the cooling system preventing any air to enter the system.
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