Coolant topup disappearing

[su888]

One thing that keeps bugging me is the coolant is always sitting on minimum - I've topped it up to maximum a number of times but it seems to disappear overnight with no apparent wet patches underneath.

Tried a drain and reflush and same problem.

Anyone experienced such a sensation?

[mrmouse3]

my sr5 does that just had the water pump replaced last thursday, it sits just on the low mark, once she warms up it sit on full, but i never had this problem before i replaced the water pump it was always just below the full mark, going to get some coolant tomorrow and top it up to see what happens

[bloke&tackle]

Mine was doing the same thing after the water pump was replaced by a Toyota dealer.
They didn't bleed the system properly, I just kept adding coolant every couple of days, took about 3 litres total before the level settled.

[andy666]

All vehicles tend to find their "natural" coolant level somewhere between the max and min marks. For example my hilux drops to about 1/2 way and sits there.
remember it's a minimum mark not an Empty mark. Leave it a few days a few days and recheck. if it hasn't dropped any lower then don't worry, that's your hiluxs natural level. If it does drop below the min mark then you do have a problem and should be checked out.

[Wing]

do a pressure test, the prado at my work place got a pissing radiator. We didn't find any mark on ground. It leaked only when moving. Toyota did a pressure test and was able to pin point the leaking location to me. A pressure test can confirm whether your system is leaking or not.

I bought my hilux second hand two years ago, the coolant stays there without adding a single drop after 30000 k.

[Ggn25]

As others said , get it pressure tested. Also look around for a white or light pink residue sprayed around the belts and pulleys . It can sometimes be better to see a water pump leak from underneath . The breather hole is on the bottom of the housing and often spotted from underneath as this surprises a lot of owners as they didn't know or notice issues even though the level is down .