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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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Old 05-15-2012, 07:10 PM
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collardgreens collardgreens is offline
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Location: rochester NY
Join Date: Sep 2009
Posts: 251
Mein Auto: 01 540/6
M62tu water pump new/old

Took my water pump off, I was thinking about replacing it but it seems fine.

Should the impeller spin freely/quickly on a new pump?

When I turn mine it feels solid and turns fine but will not spin more than I turn it.

Just wondering how much play the impeller should have. Should it spin freely like a pulley when I spin it around.
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Old 05-15-2012, 08:13 PM
JimLev JimLev is offline
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Location: MA
Join Date: Dec 2003
Posts: 4,219
Mein Auto: 540/6, S60 Volvo, Tribeca
It won't continue to turn. There is a shaft seal which keeps the coolant from leaking, and the shaft from free wheeling when you spin it.

2000 540/6 Slightly tweeked...everywhere
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Old 05-15-2012, 10:21 PM
Jared@EAC Jared@EAC is offline
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Location: Ohio
Join Date: Oct 2008
Posts: 575
Mein Auto: 00 540i/6
Agreed. It will not continue to turn. It should spin with little effort and have no shaft play though.
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