Can anyone explain why coolant is flowing into the expansion bottle on my Rascal van when the coolant is hot, as it should, but is not being drawn back into the radiator as the engine cools.
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Could be a faulty radiator cap or the 'dip tube' at the expansion tank cap is either missing or leaking.
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Is it filling up and losing water from cap?.Or is the coolant level remaining the same.?
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