Toyota radiator losing water but reservoir stays full

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Toyota radiator losing water but reservoir stays full

Unread post by Guest » Sun Nov 21, 2021 4:48 pm

My 2006 Toyota Voxy radiator fluid goes down each time I drive it but the reservoir remains full. I have to add water daily. I have replaced the radiator cap, the water pump, the cooling fan sensor and finally the radiator itself. Same problem!

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carriedi
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Re: Toyota radiator losing water but reservoir stays full

Unread post by carriedi » Mon Nov 22, 2021 2:24 pm

you should have your cooling system pressure tested for a leak. the cooling system is a closed system. when the coolant gets hot it expands into the reservoir and when it cools it contracts back into the radiator. If you have a leak anywhere in the system the pressure will vent out the leak and when it contracts it will contract at the leak. It won't pull from the reservoir. It could be as simple as a loose hose clamp or could be as serious as a blown head gasket.

See if you can have the cooling system pressure tested and find out if there is a leak and where the leak is at.

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