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Old 09-02-2017, 07:42 PM   #6
PGSigns
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Join Date: Jan 2011
Location: Hayes Va
Posts: 4,569
Re: 5/8" heater core hose blowing off!!!

With out the thermostat in there it is going to get hot. Water goes through to fast and lots of air can stay in the system. What causes the high pressure is water turning to steam. Put a thermostat in it and refill the system. Should work better after that.
Jimmy
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1966 BBW long fleet Daily driver
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