After changing thermostat 25$,
water pump 500$, water crossover gasket and egr tube 933$, pressure tested at 40 lbs. block tested 40$ and UV tested 6$,
the car still loosing coolant but runs stable at 197 degrees at idle, but still overheat on the highway.
on the highway it will reach 230 degrees and the fans will do their work and bring the heat down to about 201, but when the heat rise again about 5 minutes later it does not stop until the ac off sign appears.
So I stopped let the car cool down (20 minutes) and put 1 gallon of coolant, aa i notice boiling in the surge tank,
and when I touch the radiator it is not warm at all
but the coolant top steel tube connecting on the top of the radiator is very very hot.
Question : How come the radiator is still cold when the coolant is at 255 degrees,
And why is the coolant steel tube is so hot when it is so close to the rad. ?
Thanks in advance, By the way I am surfing on the web for a rebuilt engine just in case of .....