engine overheats

Can be a number of reasons. it can be a coolant leak into the cylinder and this can be checked with a head check, which is a simple chemical test to see if exhaust gasses are in the cooling system. most work shops can do this simple test quickly. other reasons can be a faulty thermostat a blocked radiator or a faulty water pump. if you get the radiator checked, have it removed and core cleaned, as a back flush will not do the job here. it may have a number of blocked core tubes restricting coolant circulation.

Thanks a lot for your help!
Actually, I worked with conventional air removing method that was not effective to remove the air in the radiator and reduce the pressure in the radiator.
How to remove the air in the radiator? Is normal air removing method effective?
Thanks for your comment and instruction!

Run with cap off air should make its way to the top, if you can have the front of the car slightly elevated as this can help

Thanks! I did it but does not work!

Hello and welcome to the site

It sounds like you have a blown head gasket, here is a test to help confirm the problem.

https://www.2carpros.com/articles/head-gasket-blown-test

Please run this test and get back to us we are interested to see what it is.

Cheers, Ken

Thanks a lot Ken!

Problem was solved by replacement of coolant sensor and fan relays.
Thanks for many helps every one.

Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken