View Single Post
  #18  
Old 11-30-2010, 08:54 AM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 21,279
Mein Auto: 02 BMW 525i M54 auto 130K
Can you make any sense of this?

To further dig into the inner complexities of the expansion tank, I cut into that incomplete plastic bulkhead separating the expansion chamber from the measurement chamber.


What was revealed confuses me.

Inside was a small rectangular fixed-in-place structure, directly above the distal bottom hose opening, whose purpose eludes me.


This box-like open structure over the distal hose is "pinned" down by a post coming down from the top of the surge tank; and this box has a hole in the top corner of it.


BTW, above all this, there is another hole in the upper neck of the expansion tank. This is where I see water flowing when the auxiliary water pump is running.


Can you make any sense of what the purpose and operation of these structures is?
Attached Thumbnails
Click image for larger version

Name:	bulkhead_1.JPG
Views:	14334
Size:	49.9 KB
ID:	256576   Click image for larger version

Name:	bulkhead_2.JPG
Views:	15469
Size:	78.7 KB
ID:	256577   Click image for larger version

Name:	bulkhead_3.jpg
Views:	582
Size:	63.2 KB
ID:	256578   Click image for larger version

Name:	bulkhead_4.JPG
Views:	14625
Size:	56.7 KB
ID:	256579  
Reply With Quote