Overheating question on a 1999 Toyota Sienna?

It is not your thermostat because when they go bad the car would still have heat inside. You said that the coolant level is good so the only thing left would be the water pump. It could be that the belt that drives the water pump is bad and slipping or the impeller inside the water pump can be broke free from the shaft and not moving water. When the impeller breaks free like this the pump does not make noise when it is turning and does not always leak coolant from the weep hole so If it was my vehicle I would start by checking the belt and then replacing them both because at 190,000 miles it should have been changed either way a long time ago. Hope that I have been helpful.

1999 Toyota Sienna

99 Toyota Sienna

i might say NO if the vehicle's customary miles have been city yet considering that's street... it variety of looks like he maintained the vehicle (subsequently 365000 miles on it) and probable in no way raced it. in basic terms verify for any oil leaks. attemptcontinual it and sense the tranny shift and how the engine works (if the engine makes any improper noise then it rather is going to desire a sparkling engine). although if that's in stable order, purchase it, it rather is going to final probable for yet another 25-30000 miles if pushed VERY carefully and guard good. yet in many cases at this large of a mileage maximum automobiles served their use and are waiting for an engine transplant or a final holiday or tow to the junkyard... on the different hand its toyota. stable success bro

Catastrophic engine sludge is possibly the problem. Most toyota cars produce engine sludge which overheats the engine, and then blows it. There have been thousands of reports of it. Toyota denies it and prefers to blame it on the driver not taking care of the car. Good luck.

Your issues are as follows you bought a Toyota and it has 190,000 miles. Buy a new car.

Quite obvious that car was not properly maintained as problems would have been noticed in 3000 mile checkup and also you are 90,000 miles over average so getting a new one since this not maintained like book says is cheapest bet although your van is worthless at 90,000 miles over is a .10 dedut on every mile which is 9000.00 and van is not worth it. Sell private.

have the cooling system checked at a mechanic shop.it sounds like a radiator or maybe the head gasket

Looking for a good answer on this too

Was asking myself the same thing