overheating only during warmup

[quote:c39ea8e729="mwizard69"]I have a 1994 dodge spirit with 4 cyl engine it has only 75,000 miles. When you first start driving the car the temp gage gets pegged on the hot side for between 30 seconds and 2 minutes then the cooling system seems to start working. The temps return to normal and no more problem until the car is off long enough for the engine to cool I have replaced the thermostat twice and flushed the radiator. Neither repair helped. The electric fans also seem to work fine. What else could possibly cause this problem? The problem has also been intermittent stopping for a week or more at a time.[/quote:c39ea8e729]

Did you bleed the cooling system?

You asked how to do it, so here it is:

BLEEDING COOLING SYSTEM:

Always bleed air from cooling system after replacing coolant. Set heater for maximum heat. Remove radiator cap. Loosen drain plug and remove drain bolt (if equipped) from engine block. Drain coolant reservoir. Fill coolant reservoir to MAX mark with 50/50 water-coolant mixture. Loosen bleed bolt and fill radiator up to base of filler neck. Close bleed bolt when coolant flows out without bubbles. Tighten bleed bolt. With radiator cap removed, start and operate engine to normal operating temperature. Add coolant if necessary and check for leaks.

You see were nice people well here it is go apply it