My car over heats . no water in the oil .no loss of fluid that i can tell just pressure in the radiator?

the car cools if i turn the heat on . mass pressure in the radiator but dose not come out the over flow.can sealant work for me,or is my problem simple like a thermostat?My car over heats . no water in the oil .no loss of fluid that i can tell just pressure in the radiator?
It could be your thermostat or your water pump. There are a couple of things that you can do to check the water pump or thermostat.





1.) With the engine completely cool, locate the water pump and put your hands on the pulley. If you can move it up or down or side to side, then that means the bearings are bad and the pump needs to be replaced.





2.) With the engine running grab your top radiator hose and squeeze it shut. Let go. If you don't feel any pressure when you release the hose then your pump is bad. You can also check this by popping the cap off of your radiator and look to see if you see the water flowing.





3.) To check the thermostat boil a pot of water. I know, sounds funny but I'm serious. Put your thermostat in it and continue to boil. You should see the thermostat open up. If it doesn't, then it's bad.





Hope this helped.My car over heats . no water in the oil .no loss of fluid that i can tell just pressure in the radiator?
If there is no fluid at all in the overflow you are low on coolant. If there is fluid in the overflow and it stays at cold, your thermostat could be stuck closed. If the thermostat doesnt open the coolant never passes through the radiator so it wont cool the engine, or heat the coolant enough for it to overflow into the jug. The radiator should be underpressure, the higher pressure gives water a higher boiling point. Id try a new thermostat they are usually less than $10, or if you dont want to spend the money take it completely out of the car and see if it still overheats
Take to a mechanic Quick. Over heating can destroy your engine,
go the garage and get em to look at it BUT try trustworthy mechanic's or you will get told to buy this and that , just to get them paid for fixing it








i would say THERMOSTAT
If you have electric fans, check to see if they come on when they are supposed to. If they are ok, then perhaps you have a plugged up radiator, bad thermostat, or bad water pump.
Check both the upper and lower hose, if they are both hot when the car overheats then it's not the thermostat, if they are not both hot then replace the thermostat. You may also have a cracked head or blown the head gasket so that the oil and coolant don't mix.
First: Check the radiator - not the overflow. Needs to be full of 50/50 mix - not just water.

sunshine