98 Mazda 626 overheating. Blew off hose and was

The thermostat probably seized. Check the oil for water or large amount of water coming out of the exhaust for a blown head gasket.

!st check and make sure the water is flowing in the radiator, then check
the timeing, Mazda will run hot if the timeing is rong.

follow top radiator hose to the top of engine you will find it under the thermostat housing make sure you put new one in the correct direction thermostat will usally say to radiator somewhere on the lip

I would check the thermostat. It should be in the housing that the upper radiator hose connects to. I would take the thermostat and put it in a pan of water on a stove, if the thermostat doesn't start to open before the water begins a rolling boil, the thermostat is probably stuck closed.

it is at the lower hose

If you have a 4 cyl. it is located in the front of the motor, on the left hand side, right beneath the exhaust manifold..There is a Hose connected to it...Now if you have a V6, then it is located on the back of the motor, just follow that hose on the top right side of the radiator..you have to take the air filter, and the box out to get to it..

The thermostat is located on the engine block, where the upper radiator hose connects to the engine. You'll see a large elbow-like component that is attached to the engine with 2 bolts.
Just follow that upper radiator hose and you got the location. When you remove that housing (elbow-like component), you'll see the thermostat.
Make sure you note which end of the thermostat is up and which end is down. Don't reverse the install.

, ckeck the upper hose to see if it is hot , than ckeck the bottom hose , is it cool , the temp sould be about the same .if it is super hot on top and cold at the bottom hose , the raditor may be blocked, and the coolant is not flowing. you can try to flush the radiator . look to see if there metal shaving in the coolant . if there is the radiator is breaking down. this happen to me , my car would over heat change radiator car is a,ok easy fix . radiator barn .com

The upper radiator hose runs into the thermostat housing. Remove the front of the housing and you will find the thermostat.

The thermostat on the 2002 Mazda 626 2.5 liter V6 is located at the opposite end of the lower radiator hose (near the block). It is nestled between the air-cleaner assembly and the intake manifold (on the driver side). You have to first remove the air-cleaner housing (The top half has several things attached to it; you don't have to completely remove the top half - just sort of move it aside after it hans been unencumbered; the bottom half must be completely removed as this is the area you will be working in.) The thermostat housings' top half can then be ubolted from the bottom half but you can not remove it or pull it aside to gain access to the actual thermostat until you unbolt the ignition coil pack. Mazda uses a strange metal sleeve to protect the lower radiator hose (I assume that's what it's for). There are three bolts holding the pack on (if I remember correctly, two of them hold the sleeve in place as well). After you free the sleeve you can then move the thermostat housings' top half aside and pull the thermostat out. Good luck putting it all back together - it's sort of like a jigsaw puzzle. BTW this is by far the hardest thermo I've ever had to replace.