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I'm swapping my standard heater with a deluxe heater from my parts car. I'm thing to figure out what that tube was for that went to the valve to the heater. Danchuk says it was replaced and not needed:
"Chevy proved it when they dropped the tube from production and went with the clip." http://www.danchuk.com/ItemForm.aspx?item=013

What was that little thing for?

Is the valve there to control heat temp? There is no info in the shop manual about the heater so I have to guess. My guess that it varies the amount of coolant to the heater core and that will control the temperature.


I also looked at the Assembly Manual and the defroster baffle is has the same number for the standard and deluxe heater. But Danchuk says the baffle they sale is for deluxe only. Won't my standard defrost baffle work?
http://www.danchuk.com/ItemForm.aspx?item=12376
 

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Trifive Automotive Electrical Wiring Expert
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27,084 Posts
The capillary tube did change the water flow through the valve along with the cable from the control lever. I think it works like a govenor, you set the cable to a certain place and the capillary tube moves a pistor to open and close the valve from that setting. I have one off my car and I used a hair dryer to heat the tube and could see the piston move. I suppose it was meant to maintain an even temperature.
 
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