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Registered
Join Date: Aug 2003
Location: Cypress (Houston), TX
Posts: 25
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Vacuum?
Even if there were vacuum problems, shouldn't he get heat to the center vent? The heater control valve defaults to open.
I have a heater issue with my 87 as well but haven't looked at it much yet. I'm thinking if hot water is flowing through the core (should be able to feel the heat in the return line under the plastic cover for the windshield washer motor, near the expansion valve), then maybe the mixing motor under the drivers side dash isn't working right. Topping off the coolant is next though.
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86.5 928 meteor-metallic auto
89 S4 928
87 5 speed
82 blk/blk auto
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