1986 Ford Mustang radiatot fluid bloing back into resivor

1986 FORD MUSTANG
10,000 MILES • 6 CYL • 2WD • AUTOMATIC
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RONSR2207
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fluid from rad bubbling back into res, installed new rad, thermostat, flused sys,still have same prob. it started to overheat after a/c was serviced. whats next?
Jul 25, 2008 at 8:51 AM
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DOCFIXIT
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With cap off running do you see bubbles ?
How is fan operation?
Let us know
Jul 25, 2008 at 9:06 AM
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RONSR2207
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[quote="Docfixit"]With cap off running do you see bubbles ?
How is fan operation. still can see bubbles, is head cracked?
Jul 27, 2008 at 4:50 PM
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DOCFIXIT
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More likely failed headgasket. Put a pressure tester on rad pumpup pull plugs. Let set couple hours crank if water comes out plug hole gasket bad.
Jul 28, 2008 at 8:56 AM