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Ya Know, this is gettin' old.


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Guest shane280z

Hi. My experience once with a 302 that was overheating was a poorly sealing radiator cap. That was it. I had to put one on rated for much higher pressure then 21 Lbs and lucky me got one from a friends race shop rated at 28 Lbs. That put an end to the overheating because of a poor sealing cap. You say basically 'all is good... WaterPump , ThermoStat, Hoses without leaks, and a good headgasket . What I would do is use a Radiator Vacuum Presure Tester rated for the pressure of your current 4row radiator and thereby check the entire cooling system for leaks resulting from air pockets to a blown head to a seiged waterpump bearing to a faulty thermostat. This is the ONLY test instrument that I am aware that will present you with 100per-cent accurate information as to what may really be going on here. Goodluck.

HappyTrails. shane-

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  • 2 months later...
Guest cw280z

i had a 66 stang (289) that would boil over fast. turned out to be a cracked block after alot af cusing and frustration. hope that not your prob.

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