Over heating with no signs of leaks. I have a 2001 Toyota Land Cruser that just started to over heat. Liquid is full in radiator and top hose draining back into radiator is hot. No leaking any where I can see.

Worst case, you could have a blown head gasket. Look for water in the engine oil or oil in the coolant water. May have to go to a mechanic for a compression check or a dye check.

While engine running put your hand over engine and feel the air blowing through your radiator if cold replace your thermostat, thermostat not opening.Hope this helps.

Could be a couple of things your thermostat could be faulty or sticking.your radiator or heater core could be getting plugged up to where theres not enough flow or your water pump is goin and last but id check first your belt need to be tighter could be slippin or one more your fan clutch which is just behing the fan could be weak an not driving the fan hard enough.

When the engine has reach certain temperature the thermostat opens up to allow the coolant to circulate. To check this, warm up the engine to normal operating temperature. The bottom and the top hose should be about the same temperature indicating coolant circulates freelly. If you gonna check this touching the hoses be carefull as they get really hot. Another cause of overheating is dirty radiators. If lets say you had been putting tap water in your radiator, it will get dirty over time caused by sediment in the tap water, and rust. Coolant has anti rust properties in them to prevent rusting of the cooling system. An indicator of dirty radiator is overheating at frwy speed. Another possible cause is a bad radiator fan, which have tendency to overheat when the vehicle is stopped, or in traffic, and city driving. The least possible cause is an over retarted timing. Newer cars usually don't have problem with timing being retarted since time is not adjustable, and this type of everheating is more common on older cars, which is usually caused when someone adjust the timing back to far. although you said there is no visible leaks, and the coolant pretty much stays the same I rule out a possible leak which can cause the coolant level to get to low which can cause overheating problem.