So I noticed 2 weeks ago that my wife’s LX570 coolant overflow reservoir only had about a half inch in the bottom. It’s never overheated or had the temp gauge elevated - although we’ve only owned it 3-4 months. It’s a 2014 with 170,000 miles.
PPI was done at a Toyota dealership with an additional inspection done at a Lexus dealer a month after we bought it (2 months ago). Everything checked out and no mention was made of the cooling system.
Radiator looks fairly new and is not OEM. So I figured they just had not put enough coolant in. I filled the reservoir up and 2 weeks later it’s back down to just a half inch. I filled it up last night while the engine was still slightly warm and filled it up the the F. I let it sit overnight and the coolant is all the way down to the L line. (Pictures below). There are no signs of leaking anywhere around the radiator or on or under the reservoir. No signs of leaking under the vehicle or puddles of any kind.
I ran the engine and brought it up to temperature and the coolant level rose about 1” in the reservoir tank.
Hoses appear in good condition, the upper radiator hose is not collapsed and the radiator cap looks in good condition as well.
Coolant level inside the radiator is up to the very top, bright pink and looks good.
There does seem to be a very slight sweet Smokey smell coming from the reservoir side of the engine. It’s very slight but not what I’m used to smelling with either of my 100’s or the 80 that I’ve had. Definite not the smell of oil burning like you’d get with a valve cover gasket leak. I’ve never owned a vehicle with any radiator or cooling system issues or coolant leaks so I may just be missing something.
Any ideas of what to look for or where my coolant could be going?
PPI was done at a Toyota dealership with an additional inspection done at a Lexus dealer a month after we bought it (2 months ago). Everything checked out and no mention was made of the cooling system.
Radiator looks fairly new and is not OEM. So I figured they just had not put enough coolant in. I filled the reservoir up and 2 weeks later it’s back down to just a half inch. I filled it up last night while the engine was still slightly warm and filled it up the the F. I let it sit overnight and the coolant is all the way down to the L line. (Pictures below). There are no signs of leaking anywhere around the radiator or on or under the reservoir. No signs of leaking under the vehicle or puddles of any kind.
I ran the engine and brought it up to temperature and the coolant level rose about 1” in the reservoir tank.
Hoses appear in good condition, the upper radiator hose is not collapsed and the radiator cap looks in good condition as well.
Coolant level inside the radiator is up to the very top, bright pink and looks good.
There does seem to be a very slight sweet Smokey smell coming from the reservoir side of the engine. It’s very slight but not what I’m used to smelling with either of my 100’s or the 80 that I’ve had. Definite not the smell of oil burning like you’d get with a valve cover gasket leak. I’ve never owned a vehicle with any radiator or cooling system issues or coolant leaks so I may just be missing something.
Any ideas of what to look for or where my coolant could be going?