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Engine cooling vs. heater

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Old Aug 4, 2011 | 03:02 PM
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Default Engine cooling vs. heater
Trying to add shut off valve to heater hose going into core. Will this mess up engine cooling? Anybody done this?
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Old Aug 4, 2011 | 03:12 PM
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It is done all the time and will not mess anythig up. Engine cooling will not be affected as long as it is working normally.
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Old Aug 4, 2011 | 05:10 PM
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Thanks! I guess that it's just a small diverter hose to the heater, and most of the coolant goes into the engine then back to the radiator over and over again, right?
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Old Aug 4, 2011 | 09:33 PM
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The OEM heater control valve shuts off the coolant flow so adding a manual valve wont affect anything. Ive done it several times.
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Old Aug 5, 2011 | 09:02 AM
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Thanks
Home depot parts are under the hood now. Temp gauge looks normal. No leaks so far. Hot air not blowing anymore. Fingers crossed. Need to take a longer drive to really test, then I can forget about it.
Of course, it's been 95degrees+ and muggy here for 3 weeks, and today it finally cooled off to 85. Not like Jax, though.
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Old Aug 5, 2011 | 03:25 PM
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Sounds like you have a problem with the blend door. Earlier years had a vacuum controlled valve, but I think 89 was the first year without.
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Old Aug 5, 2011 | 05:00 PM
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I think you're right. When I get the AC fixed, I'll take the inline valve out, and get the system back in order, including the blend door. Meanwhile, hope I'm good to go.
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