car overheating, have changed thermostat and flushed radiator and used bars leak headgaskt fix....

Did you have reason to believe you have a blown head gasket? That junk you put in to seal it has clogged your cooling system...there is no product in a bottle that will fix a head gasket. And no such thing as a small head gasket leak. It gunks everything up

It was constantly overheating before and losing coolant but nevr saw where it was going. So we flushed the radiayor and tried thus stuff to see if it would work. It was doin great for a couple weeks and now it overheats but dont lose much coolant.

The part about right turns is a mystery to be sure. Anyway, maybe try another radiator flush....that stuff really does get everywhere, small passages in radiator. But if the radiator has a petcock drain, see if it drains out reasonably quick, a good flow. If it does not flow out, with drain valve open, then the cores are clogged.

Modern cars are very prone to developing air pockets internally when refilling the cooling system. Then the coolant won't flow properly and you'll have problems. When turning right some coolant may be flowing just from the movement of the car and relieving the problem momentarily. Bars leak has been around since the 1960s or longer, if it clogged the system they would have figured that out long ago and stopped marketing it.That's definitely not the problem. Sometimes starting it cold with the rad cap off and letting it warm up will allow the air to escape. Of course you will need to add more coolant at that point as well. Or, you may need to get a repair shop to fill your system. They have equipment to make sure there are no air pockets in the system as it is refilled..