Water pump replacement - mystery plug

Localschauss

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In the process of replacing the water pump on my lr4. The original pump has a plug vs the replacement which has an additional hook up. From what I read online for any of the replacement quides the reference hooking up a small elbow to that area. My radiator plumbing doesn't have anywhere that I could see this would go to. Do I just plug it? Or what do I need to make this work?
 

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ktm525

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This is the new configuration. It ties into the rad hose. Only real way to get it is to order complete assembly. There is a brass version available. Did your old pump not have it??

Screenshot 2022-06-26 231112.jpg
 

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Localschauss

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Thanks - my old pump just has a plug where this would connect. Any chance sebody has a diagram of how the coolant routing should be, on the older style?
 

ktm525

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I couldn't find a real good picture in the manual. It is a bleed port with check valve that ties back into the regular system. I believe it prevents air buildup in the pump.

Screenshot 2022-06-27 082423.jpg
 

Localschauss

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This is the new configuration. It ties into the rad hose. Only real way to get it is to order complete assembly. There is a brass version available. Did your old pump not have it??

View attachment 22358

I couldn't find a real good picture in the manual. It is a bleed port with check valve that ties back into the regular system. I believe it prevents air buildup in the pump.

View attachment 22360


Thank you
No my old pump just has a plug where this connection would go and routing doesn't appear to have anywhere that this bled port could connect.
My y-conenctor had the top connect back to radiator and one leg conenct to the top of the thermostat and the other leg going to somewhere behind pump.
 

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djkaosone

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Funny, the gray y-pipe that bends down to the right is a dead y split. The hose is supposed to go to a black plastic n i p p l e that goes to the water pump. You can't just buy that piece, but someone recently made the brass replacement version.

In hind sight, whomever did that made a genius field repair.
 

Localschauss

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Funny, the gray y-pipe that bends down to the right is a dead y split. The hose is supposed to go to a black plastic n i p p l e that goes to the water pump. You can't just buy that piece, but someone recently made the brass replacement version.

In hind sight, whomever did that made a genius field repair.
Great thank you, are yous ating reroute this hose to the front of the pump as per the attached marked up picture?
 

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djkaosone

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Exactly... here's an old pic of what it should look like.

20220512_195125.jpg
 

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