Auxiliary Air Valve | <– Date –> <– Thread –> |
From: Rick Lindsay (rolindsay![]() |
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Date: Wed, 31 Dec 2008 13:23:08 -0800 (PST) |
Here are the pictures I promised. Here is the Auxiliary Air Valve mounted on the coolant expansion tank, http://www.aubard.us/Mondial/HPIM1316.JPG . These next two pictures are of the valve removed from the car and on the bench, http://www.aubard.us/Mondial/HPIM1337.JPG and http://www.aubard.us/Mondial/HPIM1338.JPG . After cleaning up the unit with brake cleaner it looks like this, http://www.aubard.us/Mondial/HPIM1342.JPG and http://www.aubard.us/Mondial/HPIM1344.JPG . In the first picture you can see a little oil remaining near the nut. These kinds of pictures are good for spotting details. The inside of the valve is still rather oily, even after cleaning. At ambient temperature of almost 60 degrees F, about 20% of the port is open, http://www.aubard.us/Mondial/HPIM1340.JPG , as is seen in this image. After applying control voltage for about 1 minute, the port closes completely, http://www.aubard.us/Mondial/HPIM1343.JPG . And in this picture you can see not only the closed port but also the Bosch part number, http://www.aubard.us/Mondial/HPIM1341.JPG - and oily residue still inside. I have since placed the AAV in the freezer at about 25 degrees F, for more than an hour. The diaphragm should be 100% open - and it isn't. Here's how it looks at 25 degrees F, http://www.aubard.us/Mondial/HPIM1346.JPG . Its open no more so than at 59 degrees F! My guess is that before I cleaned up the valve, the diaphragm didn't move at all. I'll continue to clean and flush away the oily debris inside thereby hopefully freeing the movement to open fully. If it will not do so, a new AAV will be in my future. regards, Rick
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Auxiliary Air Valve Rick Lindsay, December 31 2008
- Re: Auxiliary Air Valve Todd Walke, December 31 2008
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