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Old 10-24-2016, 09:41 AM
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Default Hose size question

My heater hoses and clamps are original year 1991. So I go to Autozone to pick up enough to replace and they come out and look and say could be any of 3 different sizes. I do see that a small foot long or so piece of hose from the water pump is factory curved. They would need a piece of other hoses to match but it's my only ride so I want to buy before cutting hoses. I went to Napa and they think it has 2 different size factory hoses on it. How hard is it to get heater hoses? Lol Any help out there?

5.0 302 1991 Pickup

Last edited by Martian; 10-24-2016 at 09:43 AM.
Old 10-24-2016, 09:48 AM
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Please stick with the forum's default font.
Old 10-27-2016, 03:41 PM
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Heater hoses are 5/8 and 3/4. That curved one is special like a radiator hose, you can't just bend regular hose it will kink.
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Old 10-29-2016, 12:45 PM
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Coolant bypass around the thermostat is probably this one:

http://www.autozone.com/ignition-tun...eVehicle=false
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Old 10-31-2016, 10:23 AM
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Originally Posted by Just call me Sean
Heater hoses are 5/8 and 3/4. That curved one is special like a radiator hose, you can't just bend regular hose it will kink.
So which is 3/4 or 5/8? Or are you saying it could be either?
Old 10-31-2016, 01:21 PM
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5/8 into the heater core, 3/4 out. I have seen some that had all 3/4 though.
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Old 11-01-2016, 02:15 PM
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Originally Posted by Just call me Sean
5/8 into the heater core, 3/4 out. I have seen some that had all 3/4 though.
Wow that's crazy they did that, I guess I will just have to take em off and get someone to give me a ride to get replacements. Thanks
Old 11-01-2016, 09:40 PM
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If there's any numbers left on them they will say what size they are.




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