motor is fresh built w/ turbo kit on. did a street part throttle tune and car temp seem to be over heating. when car temp guage reach around the upper area of H. there seem to be no overflowing of coolant, no leaking from coolant reserve tank, not losing any coolant. have new coolant, themo, fan switch.

 

did you bleed the coolant system? I did that on a fresh rebuild. definitely check it out. led me right to a blown head gasket

 

did you get a bigger radiator/fan combo? also is your front mount blocking alot of the airway to the radiator?

 

You might have a bad sensor.

 

i bleed the coolant system and notice that my heater hose bypass that goes into the dash is not working properly. the air blowing inside the car is just cool air. found the bypass switch moving but the screw that hold the arm is not. try tighten the screw but still goes loose. will not let hot coolant going inside dash area. can this be a cause for over heating?
i have a factory dual core radiator w/ an aftermarket 12in fan w/ switch. the front mount intercooler look to be blocking the airway for the radiator.
i though that the sensor might be bad, but before driving the car the temp is at normal.

 

ok i have fix the heater hose problem, replace the coolant temp guage, and replace with new coolant and bleed the system. the car still over heat while driving normal. both hose on the radiator seem to be very hot and the upper hose seem to be bubbing inside when squeeing. seems like boiling inside?? can my head be warp? the last thing i can think of is taking the head to go resurface. can a leakdown test help slove and problem like this?

 

yes do a leakdown test with the radiator cap off. look for bubbles.