1996 2WD 4.3 Heater core

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12-03-2018, 05:22 PM

AZputter

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Join Date: Dec 2018

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1996 2WD 4.3 Heater core

Anybody know the max PSI back pressure that can be applied attempting to unclog a heater core while in-sit-u without causing damage?

12-04-2018, 11:34 AM

rriddle3

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Location: Fort Worth,Texas

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*moved to '2nd gen tech'*

12-10-2018, 07:02 PM

DonL

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Location: Ontario canada

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I've hooked up the hose and have gone full blast without any damage. But could be luck of the draw. I've also gone both ways after unclogging to get any remaining out. Again could be luck of the draw...

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