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Why Is My Coolant Not Circulating . Had the thermostat, water pump, replaced, flushed backwards to clear any airlocks. Why is my coolant reservoir empty but not overheating? The largest online 914 community! from www.914world.com These can be external or internal faults causing blockages. You can feel the hose vibrating and increasing in temperature when it is flowing. To solve this issue, you will first need to fill warm water in both the hoses and then bleed the system once again.

Why Isn't My Coolant Circulating . The coolant does not drain back into the radiator, it is drawn in when the radiator cools and creates a low pressure in. Had the the cooling system pressure cleaned and tested, was told it is all working fine. Coolant not circulating... Page 2 VW T4 Forum VW T5 Forum from www.vwt4forum.co.uk You have to check for any damaged water pump or if your radiator is clogged. The radiator is full of water but it isn't circulating through the upper radiator hose. Draining the cooling system and removing the suspect radiator hose could determine if the hose itself is the source of the problem.