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Heater Core Bypass Needed?

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Old Feb 16, 2019 | 01:14 PM
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Default Heater Core Bypass Needed?
Hello,

I do not have a heater core in my car at the moment. I deleted all the AC stuff and need to get a cover and blower, but wont do that for a while.


Do I need to run a short hose from the water pump outlet to the inlet on the intake manifold to bypass the heater core, or can I just plug these?

Do I need that circulation? Any harm in not having this bypass?

Thanks.

Dom
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Old Feb 16, 2019 | 01:30 PM
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1/2" NPT pipe plugs are fine.
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Old Feb 16, 2019 | 01:32 PM
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a hose would be better ,the flow is good
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Old Feb 16, 2019 | 02:12 PM
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My heater core broke on a different car and I just used a deep well socket that was closed to the inner diameter of the hoses and two clamps for a temporary fix.
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Old Feb 16, 2019 | 03:05 PM
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Zillions of generators and boat engines have plugs there. No worries.
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Old Feb 16, 2019 | 03:37 PM
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Absolutely no need for a bypass. Also, they look goofy. I've been running my 77 for ten years with pipe plugs in the manifold and water pump.
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Old Feb 16, 2019 | 08:26 PM
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Just plug it on a Chevy. The cars had a hot water shut off valve anyway,,
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Old Feb 17, 2019 | 03:28 AM
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And water is shut off when it is too hot outside to run heat.
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