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Discussion Starter #1
Hi, new to the forum. I am looking at a 2005 Z4. Can the roof pump be inspected visually without disassembling anything or removing the top? Look for water stains? I don't see any seal I could move back and look down in there.

I was thinking I could poke the drains from the bottom but not water would only tell me half the story. I want to see if there are any signs the pocket filled up with water and flooded the motor/pump assembly.

Thanks for any insight!
 

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Its hard to see down there even if you know what you are looking for. Easiest way to check the drain plugs is pour a litre of water down each side, it should flow straight out under the sills in front of the back wheels.
 

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Discussion Starter #3
Well hopefully the seller is ok with that! :)
 

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If you push the bottom edge of the head liner back in the area just by the driver's shoulder you can see the pump housing if you use a flashlight. If the pump motor is really corroded there's sometimes some rust stains you can see. Note that you can have a perfectly clean looking motor housing and still have a severely corroded motor.
 

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If you push the bottom edge of the head liner back in the area just by the driver's shoulder you can see the pump housing if you use a flashlight.
To be pedantic, the motor sits on the left of the car just in case you are UK based.
 

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Discussion Starter #6
If you push the bottom edge of the head liner back in the area just by the driver's shoulder you can see the pump housing if you use a flashlight. If the pump motor is really corroded there's sometimes some rust stains you can see. Note that you can have a perfectly clean looking motor housing and still have a severely corroded motor.
Thanks, let me give that a try.
 
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