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Subject Where is the smoke coming from? If from the small hole in
     
Posted by LitlElvis on August 18, 2020 at 11:17 AM
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In Reply To Driver side recirc. valve leaking. posted by Tanley (ATL) on August 16, 2020 at 09:11 AM
     
Message the casting under the diaphragm cap, this may be normal due to a small amount of pressure escaping past the internal guide and valve stem into this cavity. It would not be normal if a large volume of air is escaping through this hole, which would indicate a ruptured diaphragm.

     
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