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Old 08-12-2006, 02:39 PM   #1
smills78gmc
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Radiator Question

What does this port do? The one under the overflow but over the tranny lines
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Old 08-12-2006, 02:42 PM   #2
smills78gmc
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Re: Radiator Question

The ports for the intake is on the other side and the one for the water pump is below the tranny lines at the bottom. It has been 8 months since I removed the radiator so my memory is foggy. Please help
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Old 08-12-2006, 02:44 PM   #3
79BIG10
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Re: Radiator Question

that's the return line from your heater core. You will have a line from the top of the intake to the heater core port on the firewall then the return goes back into the radiator port you have there. I've added a valve where the supply line to the heater core can be shut off during summer. This keeps the cab a little bit cooler. Just make sure to do the supply side from the intake and not the other side after the heater core to the radiator. This would cause the heater core to burst. Also if you install it make sure to run it open about once a month to keep it flushed out.
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Old 08-12-2006, 04:17 PM   #4
smills78gmc
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Re: Radiator Question

Does that mean there is no heater hose that attaches to the water pump?
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Old 08-12-2006, 04:34 PM   #5
Prerunner1982
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Re: Radiator Question

It can go from the intake or the water pump, as long as the other port is blocked off. Mine come off the intake....
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Old 08-12-2006, 04:48 PM   #6
smills78gmc
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Re: Radiator Question

Ok, I see. Thanks guys
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