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Old 03-10-2012, 04:18 PM   #1
pwrunt3pte
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how to flush coolant without heater hose? Can I use the waterpump bypass?

i want to flush my coolant. I don't have a heater core installed in the truck. the prestone kit wants you to put a tee fitting in the heater hose and hookup a garden hose to it. I don't have any heater hoses. I do have the waterpump bypass hooked up. its a small 90 degree hose that goes from the front of the intake manifold to the top of the waterpump. i was thinking of taking the bypass hose off and adding a longer piece of heater hose and hooking it backup and putting the tee fitting in there. I believe that would allow me to pump out the old coolant. any suggestions? Has anyone tried it like this? thanks
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Old 03-10-2012, 05:49 PM   #2
OrrieG
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Re: how to flush coolant without heater hose? Can I use the waterpump bypass?

should work, remember to get it up to temp so the thermostat opens up, or remove it so you get a full flush. when you hit it with the flushing water it will cool enough to close the t stat again, that is why I usually remove mine, gasket is cheap.
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Old 03-11-2012, 07:42 AM   #3
Handfull 54
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Re: how to flush coolant without heater hose? Can I use the waterpump bypass?

Dont forget to drain both sides of the block. Keep flushing the system until the water runs clear.
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Old 03-11-2012, 07:55 AM   #4
pwrunt3pte
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Re: how to flush coolant without heater hose? Can I use the waterpump bypass?

thanks everyone for the input
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