2002 2.3 Heater Core Clamp Off? - Saab 9-5 Bulletin Board - Saabnet.com
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2002 2.3 Heater Core Clamp Off?
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Posted by Joe [Email] (#444) [Profile/Gallery] (more from Joe) on Thu, 24 Jun 2021 11:05:25 Share Post by Email
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I just repaired the flap arm on the driver’s side (by cutting open the heater box) and apparently did not get everything perfectly aligned. The AC now works but the driver side is consistently 8° to 10° warmer than the passenger side. The passenger side will be in the 40s and the driver side will be in the 50s. I’m assuming this is some sort of issue with the blend door.

I have the McKay coolant bypass valve removal hoses in place so there is coolant going through the heater core at all times and I know from having repaired it it does put a fair amount of heat in the heater box all the time. It’s just this big piece of 180° metal heating up the whole inside. If I use a vice grip to clamp one of the heater core hoses as an experiment, is anything going to explode/over pressurize? Is it going to cause a problem with the flow for the rest of the system? Thanks for any input.


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