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Radiator Expansion Tank


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You pour water &/or coolant into it through the lid on the top. If you look at the side of it, it has a marking for Full.

I wouldn't worry about it to much. As long as there's some water in there it'll be ok. I find they never have a consistent level in them & it also depends on the engine temp etc.

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Hi mate, yeah i have the same problem, my expansion tank level seems to fluctuate frequently but my radiator is always full.. i keep worrying myself thinking theres a problem as i always have to top up the expansion tank. but i never have to top up my rad, is this a good thing? or should the expansion always staff at the full mark?

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