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Old26Buick

48 Ford rad. hose keeps blowing off

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I have a 48 Ford that the left rad. hose keeps coming off the cylinder head.  It will idle for 1/2 hour and no leaks, If I give it full throttle for a couple  minutes the hose blows off. Have tighten the hose as much as I can and even remove 160 degree thermostat. Thanks for any help.

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With the hose off and coolant level to the top of the head outlet, run the engine and look for bubbles. You may have a blown head gasket.

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If you see large or small bubbles when you perform the test that I described, you have a blown head gasket. When you pull the head, make sure that you check for cracks around the valves and along the edges of the cylinders.

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