Do i have to bleed the coolant on my 1993 thunder bird after i replace the thermostat

If it isn't circulating more then likely you have a air pocket somewhere

check your vacuum actuated heater valve assembly under the hood for proper function .possible malfunctioning thermostat

gauge might be faulty

Sounds like it's leaking from the water pump. There are weep holes in the water pump and when the bearing in the water pump has worn out, coolant will start to leak from the holes.

Replace the water pump after you inspected it for any signs of leak. Good luck and thank you for using Fixya.

If your car is not loosing coolant, it might be a stuck thermostat, or a louse impeller on the water pump shaft. To find it out, start the car, and while in idle open the coolant bleeding valve. if you will see a coolant jet popping out then the water pump is O.K. Stop the engine and after cooling, then it is worth to remove thermostat, inspect and if necessary replace it with a new one.

bad thermostat and coolant maybe low. when a engine gets to hot at certain boiling point it evaporates

No bleed valve. If you want to get the air out of the system, just run the car until it's hot and the thermostat opens, and then run it some more so that the coolant is fully distributed. The air will get to the top of the engine - the filler cap. Then after it's cool you can refill the engine, and the overfill tank.

Try to bleed the system. Also keep an eye on the coolant level. If it drops and you see no leaks the you could have a blown head gasket. Also replace the thermostat and hoses.

Thanks for the quick reply. What you have is a thremostat that is stuck in the "open" position. This would explain why the temp gauge reads low. Also, this condition will also cause the engine to seem like it is "revving up". Why? Because the OverDrive will not engage until the temperature of the coolant is 172 degrees F. When the coolant reaches that temp, the OD solenoid gets power from the ECU, dependant on the temp mentioned above...NOW, when the temp of the coolant DROPS below 172 (as in having a seized open thermostat), the solenoid is de-energized by the ECU, and the trans shifts OUT of OD. Downshifting to the next lower gear cause the RPMs to incerase. In any case, replace the thermostat, and whilst you are doing this, replace the coolant, also. If you have RED coolant, that is factory Toyota coolant. Is is a GOOD IDEA to continue using the red coolant if you already have it in your cooling system. Buy the stat and the coolant at a Toyota dealer. Do NOT buy an "aftermarket" stat. The cheaper ones do NOT have the air "wiggle" valve built into the stat. Install the stat with the little "wiggle valve" pointing straight up; "12 o'clock". Add 50-50 coolant water mix, Bleed the air from the cooling system & you will be fine.

stop working on the front brakes you have a weel cylnder in the back hung up and its pushing all the fluid to the right front tire