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Super Moderator
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Discussion Starter #1
Changing out the water pump and the new one looks like it's missing something. The old pump has this plug, new one doesn't. The old pump has no hole on the top, the new one does.

 

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Premium Member
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278 Posts
Some pumps have a weep hole, but you also say it has a hole on the top. here's the pump from tdiparts, I can see a seal there

 
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Maybe you can pop the old one out and reuse it? What brand is the pump?
 

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Discussion Starter #4
It's a bosch...I am thinking that I may just use it since the weep hole on the top and the hole on the bottom both lead to the same "chamber". Maybe the plug is because the same pum is used on another application and they plug it for this. Maybe twice the weep holes?
 

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Discussion Starter #5
Confirmed, the new pump is defective, the other bosch pumps sitting on the dealer shelf don't look like this one, they all have the plug.
 
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